SCAR-IASC Open Science Conference, Saint Petersburg, Russia, 2008,  Ashworth, A.C., Lewis, A.R. and Marchant, D.R., Extinction of the Antarctic tundra biome. (accepted).

American Geophysical Union, San Franscisco, CA, 2007, Ashworth, A.C., Lewis, A.R., and Marchant, D.R., Major mid-Miocene climate change in the Transantarctic Mountains, Eos Trans. AGU,
88 (52), Fall Meet. Suppl., Abstract C42A-03

Geological Society of America, Denver, CO, 2007, Lewis, A.R., Marchant, D.R., Ashworth, A.C., Hemming, S.R., and Machlus, M.L., Major middle Miocene global change and the extinction of tundra communities. Abstracts with Programs 39 (6), 183-15, p. 498.

Geological Society of America, Denver, CO, 2007, Ashworth, A.C., Lewis, A.R., and Marchant, D.R., Mid-Miocene extinction in Antarctica. Abstracts with Programs 39 (6), 216-7, p. 586.

Xth International Symposium on Antarctic Earth Sciences (ISAES), Santa Barbara, CA, 2007, A.C. Ashworth, A.R. Lewis, D.R. Marchant, R.A. Askin, D.J. Cantrill, J.E.   Francis, M.J. Leng, A.E. Newton, J.I. Raine, M. Williams, and A.P. Wolfe, The Neogene biota of the Transantarctic Mountains. Online Proceedings of the ISAES X, eds. A. K. Cooper and C. R. Raymond et al., U.S. Geological Survey and The National Academies, USGS Open-File Report 2007-1047, Extended Abstract 071.

Xth International Symposium on Antarctic Earth Sciences (ISAES), Santa Barbara, CA, 2007,  Lewis, A.R., Marchant, D.R., Ashworth, A.C., Hemming, S.R., and Machlus, M.L.  Major middle Miocene climate change and the extinction of tundra communities: Evidence from the Transantarctic Mountains, Online preceedings of the ISAES X, edited   by A. K. Cooper and C. R. Raymond et al., U.S. Geological Survey and The National Academies, USGS Open-File Report 2007-1047, Extended Abstract 135.

Xth International Symposium on Antarctic Earth Sciences (ISAES), Santa Barbara, CA, 2007, McDonald, C.M., Francis, J.E., Compton, S.G.A., Haywood, A., Ashworth, A.C.,Hinojosa, L.F., Smellie, J., Herbivory in Antarctic Fossil Forests: evolutionary and palaeoclimatic significance. U.S. Geological Survey and The National Academies, USGS Open-File Report 2007-1047, Extended Abstract. Extended Abstract 059.            

FossilsX3, 4th International Congress of Palaeoentomology, Vitoria-Gasteiz, Spain, 2007, Ashworth, A. C., Neogene Insects from Antarctica. Abstract Book, p. 60.

International Carabidologists' Meeting, Carnegie Museum of Natural History, Pittsburgh, PA., 2006, Ashworth, A. C., The first ground beetle from Antarctica (Carabidae:Trechinae): a biogeographic gem.

Botany 2006, California State University, Chico, CA., 2006, Hage, Megan M., Fawley, Marvin W., Ashworth, Allan C., Hutchison, Ronald S., Fawley, Karen P.,
2006, Soil cyanobacteria and eukaryotic algae from microbiotic crust near the Beardmore Glacier, Antarctica.

Geological Society of America North-Central Section Meeting, Akron, OH., 2006, Kummer, Troy and Ashworth, Allan, Modeling a growth series for an Antarctic freshwater snail.

AMQUA XIX, Bozeman, MT., 2006, Newbrey, Michael, Lepper, Kenneth Ashworth, Allan, and Kummer, Troy, 2006, Reassessment of the fishes, paleoenvironment, and age of the Ree Heights fossil fish locality, South Dakota .

Society of Vertebrate Paleontology, Ottawa, Ontario, 2006.7. Newbrey, M.G., M.V.H. Wilson, and A.C. Ashworth 2006 Evidence for two taxa of Hiodontidae in the Cretaceous Dinosaur Park Formation, Alberta. Journal of Vertebrate Paleontology 26 (supplement to 3), p.105A.

Fourth International Meeting on Mesozoic Fishes, Madrid, Spain, 2005, Newbrey, M.G., Wilson, M.V.H., and Ashworth, A. C., Growth characteristics of Cretaceous and Cenozoic North American Esociformes: Implications for systematics. In Fourth International Meeting on Mesozoic Fishes - Systematics, Homology, and Nomenclature, Extended Abstracts; edited by F.J. Poyato-Ariza; Madrid, Servicio de Publicaciones de la Universidad Autónoma de Madrid / UAM Ediciones. pp. 201-204.

Geological Society of America, Minneapolis, 2005. Mink, R. and Ashworth, A. C. Morphometric and survivability experiments on Ranunculus (Buttercup) achenes related to
their occurrence in the Meyer Desert Formation, Sirius Group, Antarctica http://gsa.confex.com/gsa/2005NC/finalprogram/abstract_87048.htm

Palaeontological Association, Lille, France. 2004. Jane Francis, Alan Haywood, Allan Ashworth, Steven Roof and David Cantrill. Neogene climates near the South Pole: evidence from fossil plants and climate-vegetation models http://palass.org/pages/annual2004/talk_abstracts_2004.pdf

American Geophysical Union, San Franscisco, 2004. Roof, S. R., Ashworth, A. C., Cantrill, D. J. and Francis, J. E . Evidence of Active Warm Based Neogene Glaciation in the Transantarctic Mountains.

Geological Society of America, Denver, 2004. Ashworth, A.C. The biogeographic significance of Antarctic Neogene insects. Abstracts with Programs 36(5):30-4.

Society of Vertebrate Paleontology, Denver, 2004. Newbrey, M. G., Ashworth, A. C. and Wilson, M.V.H. 2004. Geographic trends in North American freshwater fish from the Cretaceous to the Pliocene.

Society of Vertebrate Paleontology, St. Paul, Minnesota, 2003. Newbrey, M. G. and Ashworth, A.C. Fish community dynamics, growth of Yellow Perch, and correlations with climate and fire in an early Holocene Lake in North Dakota.

9th International Symposium on Antarctic Earth Sciences, Potsdam, Germany, 2003. Ashworth, A. C., Askin, R., Cantrill, D., Kuschel, G., Preece, R., and Thompson, F. C., The Neogene terrestrial biota of Antarctica (in press).

INQUA Congress, Reno, Nevada, 2003. Ashworth, A. C., The Quaternary record for extinction and speciation in the Coleoptera (in press).

INQUA Congress, Reno, Nevada, 2003. Newbrey, M. and Ashworth, A., 2003, A new method to estimate early Holocene mean annual temperature using growth characteristics of fossil Perca flavescens (yellow perch) (in press).

Entomological Society of America, Ft. Lauderdale, Florida, 2002, Ashworth, A. C. Quaternary extinctions: an apparent misnomer when applied to the Coleoptera Program p. 43.

Geological Society of America, Denver, Colorado, 2002, Ashworth, A. C., Cantrill, D. J., Kuschel, G., Preece, R.C., and Thompson, F.C. Extinction of the Antarctic Terrestrial Biota, Abstracts with Programs 34, 104-15, p.239.

International Association for Great Lakes Research, Winnepeg, Manitoba, 2002. Yansa, C. H., Ashworth, A. C., and Fisher, T. G., Early Holocene plant and animal colonization of the southern basin of glacial Lake Agassiz, Abstracts from the 45th Conference on Great Lakes Research, 126.

Geological Society of London/Geological Society of America, Edinburgh, Scotland., 2001. Ashworth, A. C. The Late Neogene environment of the interior of Antarctica (Paper #7636)

Geological Society of America, Boston, Massachusetts, 2001. Ashworth, A. C., A Cenozoic fossil insect assemblage from Antarctica, 2000. Abstracts With Programs, 33, A-267.

Geological Society of America, Reno, Nevada, 2000. Ashworth, A. C., Gutenkunst, M. and Nelson, R. E., 2000, The climate during the last advance of the Puget Sound glacier (Vashon Stade, Fraser glaciation) based on fossil beetles from Seattle. Abstracts With Programs A-404.

8th International Symposium on Antarctic Earth Sciences, Wellington, New Zealand,1999. Ashworth, A.C., The fossils of the Meyer Desert Formation, Sirius Group, Transantarctic Mountains. Programme & Abstracts, p. 28

8th International Symposium on Antarctic Earth Sciences, Wellington, New Zealand,1999. Askin, R. A., Ashworth, A. C., Harwood, D.M., Webb, P.N., and Wilson, G.S., Palynological Survey of Sirius Group and related Neogene sediments in the Transantarctic Mountains. Programme & Abstracts, p.30

American Association of Petroleum Geologists, San Antonio, Texas, 1999. Ashworth, A.C, Response of beetles to global change, the past is a clue to the future.

North Dakota Academy of Sciences, Grand Forks, 1999. Ashworth, A.C. Paleoclimatology - North Dakota Prairie pothole Region. Climate change in North Dakota since the last glaciation - review of the paleontological record.

Geological Society of America, Toronto, Canada. 1998. Ashworth, A. C. Recent fossil discoveries from the Meyer Desert Formation, Sirius Group (Pliocene), Transantarctic mountains, Abstracts With Programs, A-36.

Geological Society of America, Toronto, Canada. 1998. Yansa, C. H. and Ashworth, A. C. Holocene vegetation in southeastern North dakota during the Moorhead phase of Glacial Lake Agassiz, Abstracts With Programs, A-168.

American Quaternary Association, Puerto Vallarta, Mexico. 1998. Ashworth, A. C. The beetles response to the last glaciation in the mid-latitudes of South and North America.  Program and Abstracts of the 15^th Biennial Meeting, 3-5.

Globenet Workshop, Helsinki, Finland, 1998 (invited). Ashworth, A. C. Response of beetles to global change: past and future change.

Pole-Equator-Pole (PEP), Merida, Venezuela, 1998, Ashworth, A.C. A Comparison of the Beetle Faunas of the Last Glaciation from the Mid-latitudes of North and South America.

Geological Society of America, Columbus, 1998 Askin, R. A. and Ashworth, A. C. Palynomorphs from peat and lacustrine beds in the Sirius group of the central Transantarctic Mountains.

Geological Society of America, Salt Lake City, 1997. Ashworth, A.C., Miller, N. G., Schmidt, V. G., and Willenbring, J. W. The Sixmile Creek site, Ithaca, New York, and potential problems with mid-Wisconsinan regional paleoclimatic interpretations. Abstracts With Programs, 29: A-37.

II Southern Connections Congress, Southern Temperate Biota and Ecosystems, Past, Present, and Future, Valdivia, Chile, 1997. Ashworth, A.C. The beetle fauna during the last glaciation in the Chilean lake region. Noticiero de Biologia 5(1): 87.

II Southern Connections Congress, Southern Temperate Biota and Ecosystems, Past, Present, and Future, Valdivia, Chile, 1997. Ashworth, A.C., Harwood, D.M., Webb, P. N., and Mabin, M.G.C. The paleontology of the Pliocene Meyer Desert Formation, Sirius Group, Dominion Range, Antarctica. Noticiero de Biologia 5(1): 134.

Geological Society of America, Denver, Colorado, 1996, A.C. Ashworth. A preliminary report on the terrestrial biota of the Meyer Desert Formation, Sirius Group, Transantarctic Mountains. Abstracts with Programs 28: A-224.

Geological Society of America, Ames, Iowa, 1996, A.C. Ashworth. The record of extinction in Quaternary beetle faunas. Abstracts With Programs p. 28.

NATO Advanced Workshop "Past and future rapid environmental changes: The spatial and evolutionary responses of terrestrial biota", Crieff, Scotland, 1995. A.C. Ashworth. The response of beetles to Quaternary climate changes.

XIV International Quaternary Congress, Berlin, Germany, 1995. A.C. Ashworth. The importance of landscape differences in the response of beetles to climate change at the end of the Pleistocene: comparisons between North and South America. INQUA Abstracts p. 15.

III International Symposium of Carabidology, Kauniainen, Finland, 1995, A.C. Ashworth. The response of arctic Carabidae to climate change: fossils as a key to understanding the future.

7th International Symposium on Antarctic Earth Sciences, Sienna, Italy, 1995. P. Webb, D. Harwood, A. Ashworth, R. Hill, M. Mabin, and B. McKelvey. "Late Cenozoic Beardmore Valley and Paleofjord", Abstracts p. 402.

National Science Foundation Workshop "Pliocene Antarctic Glaciation", Woods Hole Oceanographic Institution, 1995. A.C. Ashworth, P.N. Webb, and D.M. Harwood. Vertebrate, Arthropod, and Plant Fossils from the Meyer Desert Formation, Sirius Group, Dominion Range, Antarctica

National Science Foundation Workshop "Pliocene Antarctic Glaciation", Woods HoleOceanographic Institution, 1995. P.N. Webb, D.M. Harwood, A.C. Ashworth, R.S. Hill, M.G.C. Mabin, and B.C. McKelvey. "Late Cenozoic Beardmore Valley and Paleofjord"

Geological Society of America, Lincoln, Nebraska, 1995. A.C. Ashworth, R.F. Biek, E.C. Murphy, and G. W. Shurr. Little faults and folds on the prairie: evidence for Neogene tectonism in North Dakota.

American Association for the Advancement of Science, Washington, D.C., 1995. R. Reiss, D.P. Schwert, A.C. Ashworth. Testing biogeographic models using molecular evolutionary genetics of the arctic/alpine beetle Amara alpina

United States Geological Survey Workshop "Pliocene High-Latitude Climate Records", Herndon, Virginia, 1994. A.C. Ashworth, D.M. Harwood, P.N. Webb. Beetle and seed fossils from the Meyer Desert Formation, Sirius Group: new records for Antarctica. USGS Open-File Report # 94-588, p.3.