Dr. Arthur (Art) Sweet passed away peacefully at his home on March 5, 2017 at the age of 74. Art was one of Canada’s gifted geologists and palynologists and his death is a loss to the country and the scientific community. He will be missed by all of those whose lives he touched.
Art was born in Lloydminster, Sask. in November, 1942. Berry picking, grouse hunting and fishing during his childhood on the family farm by Gull Lake, Alberta, stimulated his active interest in the natural world. Plowed fields yielded interesting rocks, and traditional farming gave him knowledge that informed his future life in urban Calgary.
Art started his education, to Grade 6, in one-room schoolhouse, later earning a B.Sc. from the University of Alberta, Edmonton, in 1963. He worked as a geological assistant and science teacher until completing his Ph.D. in 1972 at the University of Calgary, majoring in palynology under the guidance of Dr. Len Hills. From 1969 to 1971, he was granted the Izaak Walton Killam Memorial Award for doctoral students of outstanding caliber, while completing his thesis on Azolla and Azollopsis. In 1972, Art started as a Research Scientist at the Geological Survey of Canada, for a year in Ottawa and then in Calgary at the Institute of Sedimentary and Petroleum Geology (now GSC-Calgary), where he remained throughout his career. Art married his wife, Alberta, in 1966 and they have three children, David, Patrick and Karilynn and seven grandchildren.
At the GSC, Art first worked on Late Jurassic and Early Cretaceous terrestrial palynofloras for the coal group. He was soon drawn to study the incredible diversification of angiosperms in the Cretaceous, and the post ‘K-T’ boundary flora of the Paleogene. His objective was to understand angiosperm pollen phylogenies and to develop more refined biostratigraphies for western and northern Canada, often with synergistic collaboration from paleomagnetic studies. Art’s encyclopedic memory, for both literature and for pollen and spore specimens that he had seen, made him a scientist well suited to explore this diverse and formative interval of angiosperm development. The ‘Cretaceous-Tertiary’ boundary and contiguous strata particularly fascinated him. Many end-of-hallway coffee conversations dealt with the perturbations of floras around the world-changing Cretaceous-Paleogene boundary event. The iridium anomaly provided a precise correlation, and Art made detailed investigations of many sections in western and northern Canada, including co-leader of a Canadian Continental Drilling Project, while he meticulously documented palynological evidence of floral transitions preceding, and following the boundary. He elucidated both stratigraphic and latitudinal changes in flora and vegetation. In later years, his biostratigraphic knowledge was applied to derive a record of now-eroded sedimentary rock that once covered the Slave Craton, evidence being derived from fossiliferous sedimentary clasts within kimberlites. His most recent focus was the Albian through Paleogene strata of Bylot Island and the Yukon and Northwest Territories. From 2002-2008, he served as GSC’s Chief Paleontologist and Paleolab Leader.
A contributor of geologically essential age and environmental information, Art authored or co-authored at least 119 professional publications and 127 abstracts and/or posters at scientific meetings. GSC paleontologists support the research of GSC’s stratigraphers and mappers by reporting on referred samples. Art authored 390 GSC internal Paleontology Reports on some 4700 samples. These internal reports are substantial research documents in their own right. Art recorded the slide and microscope coordinates of important specimens from his research, leaving a detailed record of evidence for the future. Art personally collected 12,516 outcrop and well samples between 1967 and 2015. The tally of publications, reports and samples documents his contribution to Canadian geology, to ‘K-T’ boundary studies, and to the research and careers of his collaborators and colleagues, inside and outside the GSC.
Art’s office was located opposite the palynology laboratory and he was the principal scientist supervising the palynology lab. Working with lab technicians, he always aimed for the optimum preparation of samples; often having samples reprocessed a number of times.
Art Sweet’s scientific career is shown by his bibliography, but this misses the personal side of Art. Clearly, he was immensely dedicated to his discipline of palynology and geology. At the start of the working day, it was routine to find Art already in his office, having arrived at 3 or 4 AM; likewise, if chance had one driving by the GSC in the evening, one would regularly see his office light on. Evenings at home we often spent writing papers, or reviews for journals. He seemed to pack two careers of dedicated work into one lifetime. He continued to work past formal retirement age until ill-health began to limit him.
In spite of his scientific accomplishments, Art was self-effacing. He was generous to others with his time and expertise, and invariably kind and thoughtful to colleagues, students, and new-comers. He helped many people start their careers. His open office door was pasted with jokes and a sign, “A clean desk is a sign of absolutely nothing else to do”. Hospitality was often extended to out of town visitors. Art wanted to make sure that people were comfortable, had a place to stay, a home-cooked meal, perhaps even a pit roasted pig.
Few days went by when Art did not have a colleague or visitor seeking advice from his extensive knowledge of Mesozoic and Cenozoic stratigraphy and palynology, or an application of his expertise. He was gracious and kind through innumerable interruptions, the best sort of mentor students, or junior colleagues, could have. For students, “Art….created a story with every pollen grain and made even a lack of evidence exciting… every student/casual [employee] over 15 years gain[ed] an appreciation for the science….he did this in such a subtle and humble way.” (K. Boyce, 27 March 2017). Art developed particularly long lasting, fruitful relationships in science. He is honoured by the naming of two species: a fungal spore, Diplodites sweetii, (Kalgutkar et al.,1993. Review of Palaeobotany and Palynology, v 77, p. 107-118) “in recognition of his outstanding contribution to Tertiary palynology and his significant role in the understanding and interpretation of the K-T boundary”; and the pollen Parviprojectus sweetii (White, 2009. Geological Survey of Canada, Bulletin 594), dedicated for his “career-long fascination with triprojectate pollen”.
Art loved making ‘flower power’ posters for scientific meetings, and had a strong artistic aptitude in their creation. And he seemed to thrive on the pre-meeting pressure of poster preparation, still sitting at his microscope mere days before departure, interacting with a student doing the computer graphics. Work and discussions were fueled by frequent cups of instant coffee, his drunk from a blackened melamine mug (“one shake or two” he would ask when preparing a visitor’s instant coffee).
Self-sufficiency was a core value derived from Art’s childhood, and he bought a prairie pioneer knowledge to his food growing and storage. Alberta, Art and children had a rich, productive garden in Calgary – it was more than a hobby. They understood the need to nourish the soil. In the fall Art often had a truckload of leaves, collected by the landscaper from the GSC grounds, delivered to his driveway. Dug into the garden, the leaves produced a deep, friable, fertile soil. And who but Art would think of leaving potatoes out on the ground for a prairie winter, covered only by a blanket and a pile of leaves; lift the blanket and grab a potato.
Art and Alberta also had a 30 year-long bee keeping business. Coffee conversation often turned to bees, with a hint of competition between Art and John Utting, over whose bees were most productive, and whose honey was best.
Art said that he would like to think his as a “life of service and a life of science”. His children list values that he instilled in them: ‘family first, work hard, be self-sufficient, be kind and humble, sit up straight and smile’.
Arthur R. Sweet, Ph.D. Bibliography
This bibliography has been compiled from Dr. Sweet’s own bibliography and from records compiled by Dr. Dennis Braman. Abstracts and poster presentations have been omitted.
Sweet, A.R. 1972. Taxonomy, Evolution, and Stratigraphic Value of Azolla and Azollopsis in the Upper Cretaceous and Early Tertiary. Unpublished Ph.D. Thesis. University of Calgary, 403 p.
Sweet, A.R. and Hills, L.V. 1971. A study of Azolla pinnata, R. Brown. American Fern Journal, v. 61, p. 1-13.
Hills, L.V., Smith, R.E. and Sweet, A.R. 1971. Upper Devonian megaspores of Northeastern Banks Island, N.W.T. Bulletin of Canadian Petroleum Geology, v. 19, p. 799-811.
Wall, J.H., Sweet, A.R. and Hills, L.V. 1971. Paleoecology of the Bearpaw and contiguous Upper Cretaceous Formations in the C.P.O.G. Strathmore Well, Southern Alberta. Bulletin of Canadian Petroleum Geology, v. 19, p. 691- 702.
Hills, L.V. and Sweet, A.R. 1972. .The use of “Quaternary O” in megaspore palynological preparations. Review of Palaeobotany and Palynology, v. 13, p. 229-231.
Sweet, A.R. and Chandrasekharem, A. 1973. Vegetative remains of Azolla schopfii Dijkstra from Genesee, Alberta. Canadian Journal of Botany, v. 51, p. 1491-1496.
Sweet, A.R. and Hills, L.V. 1974. A detailed study of the genus Azollopsis Hall, 1968. Canadian Journal of Botany, v. 52, p. 1625-1642.
Hills, L.V., Klovan, J.E. and Sweet, A.R.. 1974. Juglans eocinerea n. sp., Beaufort Formation (Tertiary), southwestern Banks Island, Arctic Canada. Canadian Journal of Botany, v. 52, p. 65-90.
Hills, L.V., Chi, B.I. and Sweet, A.R. .1975. The genus Ocksisporites Chaloner. Review of Palaeobotony and Palynology, v. 19, p. 101- 115.
Sweet, A.R. and Hills, L.V. 1976. Early Tertiary species of Azolla subg. Azolla sect. Kremastospora from western and Arctic Canada. Canadian Journal of Botany, v. 54, p. 334-351.
Sweet, A.R. 1979. Jurassic and Cretaceous megaspores; In Contributions of Stratigraphic Palynology, Mesozoic Palynology. American Association of Stratigraphic Palynologists, v. 2, p. 1-30.
Sweet, A. R. and Jerzykiewicz, T. 1985. The Cretaceous-Tertiary boundary. Geos, v. 14, no. 4, p. 6-9.
Jerzykiewicz, T. and Sweet A.R. 1986. The Cretaceous-Tertiary boundary in the central Alberta Foothills: I. Stratigraphy. Canadian Journal of Earth Sciences, v. 23, p. 1356-1374.
Sweet, A. R. 1986. The Cretaceous-Tertiary boundary in the central Alberta Foothills: II. Miospore and pollen taxonomy. Canadian Journal of Earth Sciences, v. 23, p. 1375-1388.
Sweet, A.R. and Jerszykiewicz, T. 1987. Sedimentary facies and environmentally controlled palynological assemblages; their relevance to floral changes at the Cretaceous-Tertiary boundary. In P.J. Currie and E.H. Koster (eds.), Fourth Symposium on Mesozoic Terrestrial Ecosystems, Short Papers, Occasional Papers of the Tyrrell Museum of Palaeontology, no. 3, p. 206-211.
Lerbekmo, J. F., Sweet, A. R. and St. Louis, R. M. 1987. The relationship between the iridium anomaly and palynological floral events at three Cretaceous-Tertiary boundary localities in Western Canada. Geological Society of America Bulletin, v. 99, p. 325-330.
Sweet, A.R. and McIntyre, D.J. 1988. Late Turonian marine and nonmarine palynomorphs from the Cardium formation, north- central Alberta Foothills, Canada. In James, D.P. and Leckie, D.A. (eds.), Sequences, stratigraphy, sedimentology: surface and subsurface, Canadian Society of Petroleum Geologists, Memoir 16, p. 499-517.
Jerzykiewicz, T. and Sweet, A.R. 1988. Sedimentological and palynological evidence of regional climatic changes in the Campanian to Paleocene sediments of the Rocky Mountain Foothills, Canada. Sedimentary Geology, v. 59, p. 29‑76.
Sweet, A.R., Jerzykiewicz, T., McIntyre, D.J., McNeil, D.H., Braman, D.R. and Lerbekmo, J.F. 1989. Proposal for three coreholes intersecting the Cretaceous-Tertiary boundary in the southern interior plains of Canada. In Scientific Drilling: Sedimentary Basins, Canadian Continental Drilling Program, CCDP Report 89-3, p. 8-9.
Sweet, A.R. 1990. Palynofloras and climates of the Santonian to Paleocene of midcontinental North America. Proceedings of the Symposium “Paleofloristic and paleoclimatic changes in the Cretaceous and Tertiary”, Praque, p. 99-103.
Sweet, A.R., Braman, D.R. and Lerbekmo, J.F. 1990. Palynofloral response to K-T Boundary events – A transitory interruption within a dynamic system. In Sharpton, V.L. and Ward, P.D. (eds.), Global catastrophes in Earth history; an interdisciplinary conference on impacts, volcanism and mass mortality. Geological Society of America, Special Paper, 247, p. 457-469.
Sweet, A.R. and Cameron, A.R. 1991. Palynofacies, coal petrographic facies and depositional environments: Amphitheatre Formation (Eocene to Oligocene) and Ravenscrag Formation (Maastrichtian to Paleocene), Canada. International Journal of Coal Geology, v. 19, p. 121-144.
McIver, E.E., Sweet, A.R. and Basinger, J.F. 1991. Sixty‑five million year old flowers bearing pollen of the extinct triprojectate complex ‑ a Cretaceous‑Tertiary boundary survivor. Review of Palaeobotany and Palynology, v. 70, p. 77-88.
Sweet, A.R. 1992. The Cretaceous/Tertiary boundary: an extraordinary geological event. Wat on Earth, Spring 1992, p. 9-10.
Sweet, A.R. and Braman, D.R. 1992. The K-T boundary and contiguous strata in Western Canada: interactions between paleoenvironments and palynological assemblages. Cretaceous Research, v. 13, p. 31-79.
Ridgeway, K., DeCelles, P.G., Cameron, A.R. and Sweet, A.R. 1992. Cenozoic syntectonic sedimentation and strike-slip basin development along the Denali Fault System, Yukon Territories. Yukon Geology, 3, p.1-26.
Nichols, D.J. and Sweet, A.R. 1993. Biostratigraphy of Upper Cretaceous non marine palynomorphs in north-south transect of Western Interior Basin. In Caldwell, W.G.E. and Kauffman, E.G., eds., The Evolution of the Western Interior Basin, Geological Association of Canada Special Paper 39, p. 539-584.
Russell, D.A., Russell, D.E. and Sweet, A.R. 1993. The End of the Dinosaurian Era in the Nanxiong Basin. Vertebrata Palasiatica, p. 139-145.
Dawson, F.M., Evans, C.G., Marsh, R., Richarson, R., Power, B., Sweet, A.R. and Edwards, W.A.D. 1994. Uppermost Cretaceous and Tertiary strata of the Western Canada sedimentary basin. In . Grant D. Mossop and Irina Shetsen (compilers), Geological Atlas of the Western Canada Sedimentary Basin Canadian Society of Petroleum Geologists/Alberta Research Council (Calgary/Edmonton, Alberta, Canada), p. 387-406.
Long, D.G.F., and Sweet, A.R. 1994. Age and depositional environment of the Rock River coal basin (NTS 95D/11 and 14), Yukon Territory, Canada. Canadian Journal of Earth Sciences, 31: 865-880.
Sweet, A.R. 1994. Relationships between depositional environments and changes in palynofloras across the K-T boundary interval. In A. Traverse (ed.), Sedimentation of Organic Particles, Cambridge University Press, p. 461-488.
Hoffman, G.L.; Stockey, R.A. and Sweet, A.R. 1995. A Spirodela-like plant from the Paleocene Joffre Bridge locality. American Journal of Botany, v. 82, p. 87.
Lerbekmo, J.F., Sweet, A.R. and Braman, D.R. 1995. Magnetobiostratigraphy of late Maastrichtian to early Paleocene sediments of the Hand Hills, south-central Alberta, Canada. Bulletin of Canadian Petroleum Geology, v. 43, p. 35-43.
Ridgway, K.D., Sweet, A.R. and Cameron, A.R. 1995. Climatically induced floristic changes across the Eocene-Oligocene transition in the northern high latitudes, Yukon Territory, Canada. Geological Society of America Bulletin, v. 107, p. 676-696.
Catuneanu, O., Sweet, A.R. and Miall, A.D. 1996. Hingeline of foreland basins; mapping techniques and tectonic significance; the case study of the Campanian‑Paleocene Western Interior. Studii si Cercetari de Geologie (1990). v. 41, p. 125‑142.
Lerbekmo, J.F., Sweet, A.R. and Duke, M.J.M. 1996. A normal polarity subchron which embraces the K/T boundary: a measure of sedimentary continuity across the boundary and sychroneity of boundary events. In G. Ryder, D. Fastovsky and S. Gartner (eds.), Cretaceous-Tertiary Event and other Catastrophes in Earth History. Geological Society of America, Special Paper 307, p. 465-476.
Catuneanu, O., Miall, A.D. and Sweet, A.R. 1997. Reciprocal architecture of Bearpaw T-R sequences, uppermost Cretaceous, Western Canada sedimentary basin. Bulletin of Canadian Petroleum Geology, v. 45, p. 75-94.
Catuneanu, O., Sweet, A.R. and Miall, A.D. 1997. Hinge-line of the western Canada foreland basins as reflected within the uppermost Cretaceous Bearpaw sequences. Revue Roumaine de Geologie, v. 41; p. 87‑104.
Ridgway, K.D., Trop, J.M. and Sweet, A.R. 1997. Thrust-top basin formation along a suture zone, Cantwell basin, Alaska Range: Implications for development of the Denali fault system. Geological Society of America, Bulletin, v. 109, p. 505-523.
Sweet, A.R. 1997. Reflections on the Cretaceous-Tertiary boundary plant record: discussion. Geoscience Canada, v. 24, p.205-206.
Sweet, A.R., Braman, D.R. and Lerbekmo, J.F. 1999. Sequential palynological changes across the composite Cretaceous – Tertiary (K-T) boundary claystone and contiguous strata, western Canada and Montana, U.S.A. Canadian Journal of Earth Sciences, v. 36, p. 743-768.
Braman, D. R. and Sweet, A.R. 1999. Terrestrial palynomorph biostratigraphy of the Cypress Hills, Wood Mountain and Turtle Mountain areas (Late Cretaceous-Paleocene), western Canada. Canadian Journal of Earth Sciences. v. 36, p. 725-741.
Braman, D. R., Sweet, A.R. and Lerbekmo, J.F. 1999. Upper Cretaceous-lower Tertiary lithostratigraphic relationships of three cores from Alberta, Saskatchewan and Manitoba, Canada. Canadian Journal of Earth Sciences, v. 36, p. 669-683.
Catuneanu, O. and Sweet, A.R. 1999. Maastrichtian-Paleocene foreland basin stratigraphies, Western Canada: a reciprocal sequence architecture. Canadian Journal of Earth Sciences, v. 36, p. 685-703.
Catuneanu, O., Sweet A.R. and Miall, A.D. 1999. Concept and styles of reciprocal stratigraphies: Western Canada foreland system. Terra Nova, v. 11, p. 1-8.
Harrison, J.C., Mayr, U., McNeil, D.H., Sweet, A.R., McIntyre, D.J., Eberle, J.J., Harington, C.R., Chalmers, J.A., Dam, G. and Nohr-Hansen, H. 1999. Correlation of Cenozoic sequences of the Canadian arctic region and Greenland. Bulletin of Canadian Petroleum Geology, v. 47, p. 223-254.
Lerbekmo, J.F., Sweet, A.R. and Davidson, R.A. 1999. Geochemistry of the Cretaceous-Tertiary (K-T) boundary interval: south-central Saskatchewan and Montana. Canadian Journal of Earth Sciences, v. 36, p. 717-724.
Ridgway, K.D., Trop, J.M. and Sweet, A.R. 1999. Stratigraphy, depositional systems, and age of the White Mountain Basin, Denali Fault System, southwestern Alaska. Short Notes on Alaska Geology, 1999, p. 77-84.
Trop, J.M., Ridgway, K.D., Sweet, A.R. and Layer, P.W. 1999. Submarine fan deposystems and tectonics of a Late Cretaceous forearc basin along an accretionary convergent plate boundary, MacColl Ridge Formation, Wrangell Mountains, Alaska. Canadian Journal of Earth Sciences, v. 36, p. 433-458.
Sweet, A.R., Klassen, R.W., Lemmen, D.S. and Tokaryk, T.T. 2000. Guide to the Geology, Paleontology and Geomorphology of Grasslands National Park. In K. Smith Fargey, S. Duquette Larson, S. J. Grant, P. Fargey and C. Schmidt (eds.), Grasslands National Park Field Guide.. Prairie Wind and Silver Sage-Friends of Grasslands Inc., p.1 – 49.
Catuneanu, O., Sweet, A.R., and Maill, A.D. 2000. Reciprocal stratigraphy of the Campanian-Paleocene Western Interior of North America. Sedimentary Geology, v. 134, p. 235-255.
Lerbekmo, J.F., and Sweet, A.R. 2000. Magnetostratigraphy and biostratigraphy of the continental Paleocene in the Calgary area, southwestern Alberta. Bulletin of Canadian Petroleum Geology, v. 48, p. 285-306.
Sweet, A.R. 2001. Plants, a yardstick for measuring the environmental consequences of the Cretaceous-Tertiary boundary event. Geoscience Canada, v. 28, p. 127-138.
Sweet, A.R. and Braman, D.R. 2001. Cretaceous-Tertiary palynofloral perturbations and extinctions within the Aquilapollenites Phytogeographic Province. Canadian Journal of Earth Sciences, v. 38, p. 249-269.
Long, D.G.F., Lowey, G.W. and Sweet, A.R. 2001. Age and setting of dinosaur trackways, Ross River area, Yukon Territory (105F/15). In D.S. Emond and L.H. Weston (eds.), Yukon Exploration and Geology 2000, Exploration and Geological Services Division, Yukon, Indian and Northern Affairs Canada, p. 181-198.
Belcher, C.M., Collinson, M.E., Sweet, A.R., Hildebrand, A.R. and Scott, A.C. 2003. Fireball passes and nothing burns; the role of thermal radiation in the Cretaceous-Tertiary event: evidence from the charcoal record of North America. Geology (Boulder), v. 31, p. 1061-1064.
Belcher, C.M., Collinson, M.E., Sweet, A.R., Hildebrand, A.R. and Scott, A.C. 2004. Reply to Comment by Robertson et al., on A Fireball passes and nothing burns”. Comment and Reply: Geology (Boulder), v. 32, p. e50-e51.
Trop, J.M., Ridgway, K.D. and Sweet, A.R. 2004. Stratigraphy, palynology, and provenance of the Colorado Creek Basin, Alaska, USA: Oligocene transpressional tectonics along the central Denali Fault System. Canadian Journal of Earth Sciences, v. 41, p. 457-480.
Stasiuk, L.D., Sweet, A.R. and Issler D.R. 2006. Construction of burial history of eroded Mesozoic strata using kimberlite shale xenoliths, volcaniclastic and crater facies, Northwest Territories. Canada. International Journal of Coal Geology, v. 65, p. 129-145.
Wolfe, A.P., Edlund, M.B., Sweet, A.R. and Creighton, S.D. 2006. A first account of organelle preservation in Eocene nonmarine diatoms: Observations and paleobiological implications. Palaios, v. 21, p. 298-304.
Langenberg, C.W., Berhane, H., Sweet, A.R., Marchioni, D. and Heaman, L.M. 2007. Regional correlations of the Ardley coal zone, Alberta Earth Sciences Report 2007-05, 31p.
Chin, K., Bloch, J., Harwood, D., Sweet, A.R., Justin, T., Jaelyn, E., Stephen, C., Jakub and W., David, H. 2008. Life in a temperate polar sea; a unique taphonomic window on the structure of a Late Cretaceous arctic marine ecosystem. Proceedings – Royal Society Of London, Biological Sciences, v. 275, p. 2675-2685.
Lerbekmo, J.F. and Sweet, A.R. 2008. Magnetobiostratigraphy of the continental Paleocene upper Coalspur and Paskapoo formations near Hinton, Alberta. Bulletin of Canadian Petroleum Geology, v. 56, p. 118-146.
Lerbekmo, J.F., Heaman, L.M., Baadsgaard, H., Muehlenbachs, K., Evans, M.E., and Sweet, A.R. 2008. Normal polarity magnetosubchrons in 24r and the age of the Paleocene- Eocene boundary. Canadian Journal of Earth Sciences, v. 45, p. 781-793.
Eccles, D.R., Heaman, L.M. and Sweet, A.R. 2008. Kimberlite-sourced bentonite, its paleoenvironment and implication for the Late Cretaceous K14 kimberlite cluster, northern Alberta, Geology of northeastern British Columbia and northwestern Alberta; diamonds, shallow gas, gravel, and glaciers. Canadian Journal of Earth Sciences, v. 45, p. 531-547.
Grasby, S.E., Chen, Z., Hamblin, A.P., Wozniak, P.R.J. and Sweet, A.R. 2008. Regional characterization of the Paskapoo bedrock aquifer system, southern Alberta. Canadian Journal of Earth Sciences, v. 45, p. 1501-1516.
Eccles, D.R.; Sweet, A.R.; Creaser, R.A. and Heaman, L.M. 2009. A geochronological based approach to characterize the setting of the Buffalo Head Hills kimberlite field, northern Alberta, Canada. In D.R. Lentz, K.G. Thorne and K.-L. Beal (eds.), Proceedings of the 24th International Applied Geochemistry Symposium, v. 1, p. 239-242.
Lowey, G.W., Long, D.G.F., Fowler, M.G., Sweet, A.R. and Orchard, M.J. 2009. Petroleum source rock potential of Whitehorse trough: a frontier basin in south-central Yukon. Bulletin of Canadian Petroleum Geology, v. 57, p. 350-386.
Schulte, P., Alegret, L., Arenillas, I., Arz, J.A., Bown, P.R., Bralower, T.J., Christeson, G.L., Claeys, P., Cockell, C.S., Collins, G.S., Deutsch, A., Goldin, T.J., Goto, K., Grajales-Nishimura, J.M., Grieve, R.A.F., Gulick, S.P.S., Johnson, K.R., Kiessling, W., Koeberl, C., Kring, D.A., MacLeod, K.G., Matsui, T., Melosh, J., Montanari, A., Morgan, J.V., Neal, C.R., Nichols, D.J., Norris, R.D., Pierazzo, E., Ravizza, G., Rebolledo-Vieyra, M., Reimold, W.U., Robin, E., Salge, T., Speijer, R.P., Sweet, A.R., Urrutia-Fucugauchi, J., Vajda, V., Michael T. Whalen, M.T., and Willumsen, P.S. 2010. The Chicxulub asteroid impact and mass extinction at the Cretaceous-Paleogene boundary. Science, v. 327, p. 1214-1218.
Schulte, P., Alegret, L., Arenillas, I., Arz, J.A., Barton, P.J., Bown, P.R., Bralower, T.J., Christeson, G.L., Claeys, P., Cockell, C.S., Collins, G.S., Deutsch, A.; Goldin, T.J.; Goto, K., Grajales-Nishimura, J.M., Grieve, R.A.F., Gulick, S.P.S., Johnson, K.R., Kiessling, W., Koeberl, C., Kring, D.A., MacLeod, K.G., Matsui, T., Melosh, J., Montanari, A., Morgan, J.V., Neal, C.R., Nichols, D.J., Norris, R.D., Pierazzo, E., Ravizza, G., Rebolledo-Vieyra, M., Reimold, W.U., Robin, E., Salge, T., Speijer, R.P., Sweet, A.R., Urrutia-Fucugauchi, J., Vajda, V., Whalen, M.T. and Willumsen, P.S. 2010. Cretaceous Extinctions: Response. Science, v. 328, p. 975-976.
Barke, J., Abels, H.A., Sangiorgi, F., Greenwood, D.R., Sweet, A.R., Donders, T., Reichart, G., Lotter, A.F., and Brinkhuis, H. 2011. Orbitally forced Azolla blooms and Middle Eocene Arctic hydrology: Clues from palynology. Geology Boulder, v. 39, p. 427-430.
Haggart, J.W., Mahoney, J.B., Forgette, M., Carter, E.S., Schroder-Adams, C.J., MacLaurin, C.I. and Sweet, A.R. 2011. Paleoenvironmental and chronological constraints on the Mount Tatlow succession, British Columbia; first recognition of radiolarian and foraminiferal faunas in the Intermontane Cretaceous back-arc basins of western Canada New insights in Cordilleran Intermontane geoscience; reducing exploration risk in the mountain pine beetle-affected area. Canadian Journal of Earth Sciences, v. 48, p. 952-972.
Bercovici, A., Vajda, V. and Sweet A. 2012. Pollen and spore stratigraphy of the Cretaceous-Paleogene mass-extinction interval in the northern hemisphere. Journal of Stratigraphy, v. 36, p. 165-188.
Braman, D.R. and Sweet A.R. 2012. Biostratigraphically useful Late Cretaceous–Paleocene Terrestrial palynomorphs from the Canadian Western Interior Sedimentary Basin. Palynology, v. 36, p. 8-35.
Galloway, J.M., Sweet, A.R., Pugh, A., Schröder-Adams, C.J., Swindles, G.T., Haggart, J.W. and Embry, A.F. 2012. Correlating middle Cretaceous palynological records from the Canadian High Arctic based on a section from the Sverdrup Basin and samples from the Eclipse Trough. Palynology, v. 36, p. 277-302.
Galloway, J.M., Sweet, A.R., Swindles, G.T., Dewing, K., Hadlari, T., Embry, A.F. and Sanei, H. 2013. Middle Jurassic to Lower Cretaceous paleoclimate of Sverdrup Basin, Canadian Arctic Archipelago inferred from the palynostratigraphy. Marine and Petroleum Geology, v. 44, p. 240-255.
Fox, R.C.; Rankin, B.D.; Scott, C.S. and Sweet, A.R. 2014. Second known occurrence of the early Paleocene plesiadapiform Pandemonium (Mammalia: Primates), with description of a new species. Canadian Journal of Earth Sciences, v. 51, p. 1059-1066.
Scott, C.S.; Spivak, D.N. and Sweet, A.R. 2013. First mammals from the Paleocene Porcupine Hills Formation of southwestern Alberta, Canada. Canadian Journal of Earth Sciences, v. 50, p. 355-378.
Hadlari, T., MacLean, B.C., Galloway, J.M., Sweet, A.R., White, J.M., Thomson, D., Gabites, J. and Schröder-Adams, C.J. 2014. The flexural margin, the foredeep, and the orogenic margin of a northern Cordilleran foreland basin: Cretaceous tectonostratigraphy and detrital zircon provenance, northwestern Canada. Marine and Petroleum Geology, v. 57, p. 173-186.
Padilla, A., Eberle, J.J., Gottfried, M.D., Sweet, A.R. and Hutchison, J.H. 2014. A sand tiger shark-dominated fauna from the Eocene Arctic greenhouse. Journal of Vertebrate Paleontology, v. 34, p. 1307-1316.
CONTRIBUTIONS PUBLISHED BY GSC AND OTHER SURVEYS:
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Sweet, A.R. 1972. Palynologic study of coals and associated clastics of the Kootenay Formation, Crowsnest area. Geological Survey of Canada Report of Activities Paper 72-IB, p. 23.
Brideaux, W.W., Chamney, T.P., Dunay, R.E., Fritz, W.H., Hopkins, W.S. Jr., Jeletzky, J.A., McGregor, D.C., Norford, B.S., Norris, A.W., Pedder, A.E.H., Sherrington, P.F., Sliter, W.V., Sweet, A.R., Uyeno, T.T. and Waterhouse, J.B. 1975. Biostratigraphic determinations of fossils from the subsurface of the districts of Franklin and Mackenzie. Geological Survey of Canada, Paper 74-39, 19p.
Brideaux, W.W., Clowser, D.R., Copeland, M.T., Jeletzky, J.A., Norford, B.S.; Norris, A.W., Pedder, A.E.H., Sweet, A.R., Thorsteinsson, R., Uyeno, T.T. and Wall, J. 1976. Biostratigraphic determinations from the subsurface of the districts of Franklin and Mackenzie and the Yukon Territory. Geological Survey of Canada, Paper 75-10, 18p.
Hopkins, W.S., Jr., and Sweet, A.R. 1976. Miospores and megaspores from the Lower Cretaceous Mattagami Formation of Ontario. Geological Survey of Canada, Bulletin 256, p. 55-71.
Hopkins, W.S., Jr., and Sweet, A.R. 1976. A microflora from a short section of the Paleogene Kishenehn Formation, southeastern British Columbia. Geological Survey of Canada, Paper 76-1B, p. 307-309.
Sweet, A.R. 1978. Palynology of the lower part, type section, Tent Island Formation, Yukon Territory. Geological Survey of Canada, Paper 78-1B, p. 31-37.
Sweet, A. R. 1978. Palynology of the Ravenscrag and Frenchman formations. In J.A. Irving, S.H. Whitaker and P.L. Broughton (eds.), Coal Resources of southern Saskatchewan; a model for evaluation methodology, Canadian Geological Survey, Economic Report, v. 30, pt. 1, p. 29-39.
Sweet, A.R. 1980. Appendix 1, Palynology. In Jerzykiewicz, T. and McLean, J.R., Lithostratigraphical and sedimentological framework of coal-bearing Upper Cretaceous and Lower Tertiary strata, Coal Valley area, Central Alberta Foothills. Geological Survey of Canada, Paper 79-12, p. 27-31.
Sweet, A.R. 1985. Appendix 3, Palynology. In Gibson, D.W., Stratigraphy, sedimentology and depositional environments of the coal bearing Jurassic-Cretaceous Kootenay Group, Alberta and British Columbia. Geological Survey of Canada Bulletin 357, p. 91-102.
Jerzykiewicz, T. and Sweet, A. R. 1986. Caliche and associated impoverished palynological assemblages: an innovative line of paleoclimatic research into the uppermost Cretaceous and Paleocene of southern Alberta. Geological Survey of Canada, Paper 86-1B, p. 653-663. Reprinted In Canadian Society of Petroleum Geologists, 1986 Core Conference, October 16 and 17, Core Research Centre, Calgary, p. 7-1 -7-19.
Ricketts, B.D., and Sweet, A.R. 1986. Stratigraphy, sedimentology and palynology of the Kootenay Blairmore transition in southwestern Alberta and southeastern British Columbia. Geological Survey of Canada Paper 84‑15, 41p.
Jerzykiewicz, T. and Sweet, A.R. 1987. Semiarid floodplain as a paleoenvironmental setting of the Upper Cretaceous dinosaurs: sedimentological evidence from Mongolia and Alberta. In Currie, P.M. and Koster, E.H. (Eds.) Fourth Symposium on Mesozoic Terrestrial Ecosystems, Short Papers, Occasional Paper of the Tyrrell Museum of Palaeontology, p. 120-124.
Kalgutkar, R.M. and Sweet, A.R. 1988. Morphology, taxonomy and phylogeny of the fossil fungal genus Pesavis from northwestern Canada. Geological Survey of Canada, Bulletin 379, p. 117-133.
Sweet, A.R. and Braman, D.R. 1989. A distinctive terrestrial palynofloral assemblage from the Lower Campanian Chungo Member, Wapiabi Formation, southwestern Alberta; a key to regional correlation. Geological Survey of Canada, Paper 89-8, p. 32-40.
Sweet, A.R. and Kalgutkar, R.M. 1989. Trichopeltinites Cookson from the latest Maastrichtian of Canada. Geological Survey of Canada, Bulletin 396, p. 223-227.
Sweet, A.R., Ricketts, B.D., Cameron, A.R. and Norris, D.K. 1989. An integrated analysis of the Brackett Coal Basin, Northwest Territories. Geological Survey of Canada, Paper 89-1G, p. 85-99.
Dawson, F.M., Jerzykiewicz, T. and Sweet, A.R. 1989. A preliminary analysis of the stratigraphy and sedimentology of the coal-bearing Wapiti Group northwestern Alberta, In Langenberg, W. (ed), Advances in Western Canadian Coal Geoscience–Forum Proceeding; Alberta Research Council Information Series No. 103, p. 1-11.
Dawson, F.M.; Kalkreuth, W.D. and Sweet, A.R. 1992. Stratigraphy and coal resource potential of the Upper Cretaceous to Tertiary strata of northwestern Alberta. Geological Survey of Canada, Open File Report 2499, 56p.
Stott, D.F., Dixon, J., Dietrich, J.R., McNeil, D.H., Russell, L.S. and Sweet, A.R. 1993. Tertiary; Subchapter 4J. In Sedimentary Cover of the Craton in Canada, D.F. Stott and J.D. Aitken (eds.), Geological Survey of Canada, Geology of Canada, no. 5, p. 439-465.
Dawson, F.M., Kalkreuth, W.D. and Sweet, A.R. 1994. Stratigraphy and coal resource potential of the Upper Cretaceous to Tertiary strata of northwestern Alberta. Geological Survey of Canada, Bulletin 466, 59p.
Catuneanu, O., Sweet, A.R., Lerbekmo, J.F. and Braman, D.R. 1995. Palynological support in understanding third and fourth order stratigraphic cycles in the uppermost Cretaceous/Lowermost Tertiary, Western Canada Basin: an example of reciprocal proximal and distal stratigraphies. In J.S. Bell, T.D. Bird, T.L. Hillier, and P.L. Greener (eds.), Proceedings of the Oil and Gas Forum ’95 – Energy from Sediments, Geological Survey of Canada, Open File 3058, p. 17-22.
Jerzykiewicz, T., Sweet, A.R., and McNeil, D.H. 1996. Shoreface of the Bearpaw Sea in the footwall of the Lewis Thrust, southern Canadian Cordillera, Alberta. Current Research, 1996-A, Geological Survey of Canada, p.155-163.
De Freitas, T.A., Sweet, A. and Thorsteinsson, R. 1997 A problematic Early Cretaceous age for the conglomerates previously assigned to the Eureka Sound Group, east-central Ellesmere Island, Arctic Archipelago. Geological Survey of Canada, Current Research 1997-E, p. 21-32.
De Freitas, T.A. and Sweet, A.R. 1998. New observations on the geology of eastern Ellesmere Island, Canadian Arctic, part I: structure and stratigraphy in the vicinity of Franklin Pierce and Allman Bays. Geological Survey of Canada, Paper 1998-E, p. 21-30.
Sweet, A.R. 1999. Review of `Dinosaur Impressions. Postcards from a Paleontologist’ by P. Taquet. Geoscience Canada, v. 26, p. 49.
Stasiuk, L.D., Sweet, A.R., Issler, D.R. and McIntyre, D.J. 2002. Organic petrology, organic geochemistry, palynology, and petrophysics data from Lac de Gras kimberlites and associated sedimentary rocks and xenoliths. Geological Survey of Canada, Open File Report 4272, cd disk.
Sweet, A.R. 2008. Terrestrial Paleocene palynofloras, eastern Ellesmere Island, Arctic Canada. In Geology of Northeast Ellesmere Island Adjacent to Kane Basin and Kennedy Channel, Nunavut, U. Mayr (ed.), Geological Survey of Canada, Bulletin 592, p. 197-225.
Lane, L.S., Hayman, A., Utting, J. and Sweet, A.R. 2012. Summary of current geochemical, geophysical and biostratigraphic data for Chevron SOBC WM N. Parkin YT D-61 (UWI 300D616630137000), Eagle Plain, Yukon. Geological Survey of Canada, Open File Report 7050.
Wall, J.H., and Sweet, A.R. 1979. Field Trip Cretaceous-Tertiary, Gleichen and Bassano Districts. Canadian Society of Petroleum Geologists, Paleontology Division. 29 p.
Wall, J.H., and Sweet, A.R. 1982. Upper Cretaceous-Paleocene stratigraphy, micropaleontology and palynology of the Bow Valley area, Alberta. Canadian Society of Petroleum Geologists Field Trip (No. 10) Guidebook, 47 p.
Braman, D.R., Currie, P., Hills, L.V., Revel, R.D., Russell, D., Sweet, A.R. and Wilson, M.C. Plains region, Campanian to Paleocene. Field Trip No. 1, Sixth International Palynological Conference Calgary. 60 p.
McIntyre, D.J., Sweet, A.R., and Wall, J.H. 1984. Palynology and micropaleontology of the Foothills belts near Calgary, Cenomanian to Paleocene. Field Excursion No. 3, Sixth International Palynological Conference Calgary. 73 p.
Braman, D.R., Dawson, M., Hills, L. and Sweet, A.R. 1990. Stratigraphy of the post Wapiabi slice: southwestern Saskatchewan and southern Alberta. Canadian Society of Petroleum Geologists, 1990 Annual Convention, Basin Perspectives, 92 pp.
Sweet, A.R., White, J.M. and McIntyre, D.J. 1990. Transect of the Front Ranges and Foothills of the Rocky Mountains. American Association of Stratigraphic Palynologists, 1990 Annual Meeting, Field Guide, 32 pp.
Braman, D.R. and Sweet, A.R. (compilers) 1990. Guide to uppermost Cretaceous-Tertiary strata in southern Saskatchewan and Alberta. Canadian Society of Petroleum Geologists, 1990 Annual Convention, Basin Perspectives, Calgary, 92p.
Braman, D.R. and Sweet, A.R. 1991. Field Guide to Uppermost Cretaceous-Tertiary strata in southern Saskatchewan and Alberta. Event Markers in Earth History, August 26-27, 1991, 55 pp.
Trop, J.M., Ridgway, K.D. and Sweet A.R. 1995. Geologic History of the Lower-Cantwell Formation, Cantwell Basin, South-Central Alaska. In The Geology and Glacial History of Denali National Park and Vicinity, GSA Field Trip #9 Guidebook & Roadlog Cordilleran Section Meeting Fairbanks, Alaska, 21 p., 6 Text-Figs.
Sweet, A.R., Braman, D.R, Catuneanu, O., and Lerbekmo, J.F. 1997. Uppermost Cretaceous‑Paleocene strata in southern Saskatchewan emphasizing reciprocal stratigraphies and the Cretaceous‑Tertiary boundary. In L. McKenzie McAnally (ed.), Upper Cretaceous and Tertiary Stratigraphy and Paleontology of Southern Saskatchewan, Canadian Paleontology Conference Field Trip Guidebook No. 6, p. 45‑69.
Sweet, A.R., Klassen, R.W., Lemmen, D.S. and Tokaryk, T.T. 2000. Guide to the Geology, Paleontology and Geomorphology of Grasslands National Park. In F.K. Smith; L.S. Duquette; S.J. Grant; P. Fargey and C. Schmidt (eds.), Grasslands National Park Field Guide, Prairie Wind and Silver Sage-Friends of Grasslands Inc., p. 1-49.
Catuneanu, O. and Sweet, A.R. 2005. Fluvial Sequence Stratigraphy and Sedimentology of the Uppermost Cretaceous to Paleocene, Alberta Foredeep. Association of Petroleum Geologists with SEPM. 2005 AAPG Annual Convention American, 14 p. and supplementary figures.
J.M. White and D.R. Braman
23 April 2017
Note: this article first appeared in CAP Newsletter 40(1): 5-17, 2017.