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Community paleoecology of the Jurassic (Bajocian-Oxfordian) Sundance Seaway in the Bighorn Basin of Wyoming and Montana, United States
Kristopher M. Kusnerik* and Steven M. HollandDepartment of Geology, University of Georgia
Athens, Georgia 30602-2501
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Paleogeographic Setting
Modified from Blakey (2014)
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Geologic Setting
Modified from McMullen et al. (2014)
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Goals
![Page 5: Kristopher M. Kusnerik* and Steven M. Holland Department of Geology, University of Georgia Athens, Georgia 30602-2501 kusnerik@uga.edu](https://reader035.vdocument.in/reader035/viewer/2022062802/56649e8e5503460f94b91d30/html5/thumbnails/5.jpg)
13 localities
82 samples
49 taxa
14,550 specimens
Sampling
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Dominance and Diversity
Gryphaea Liostrea
CamptonectesPachyteuthis
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Dominance and Diversity
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Dominance and Diversity
Gryphaea
Pachyteuthis
Liostrea
Camptonectes
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Dominance and Diversity
Camptonectes
Trigonia
Pleuromya Corbicellopsis
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Dominance and Diversity
Camptonectes
Procerithium
Pleuromya
Liostrea
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Dominance and Diversity
CamptonectesKallirhynchia Liostrea Mactromya
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Detrended Correspondence Analysis
•Shallow depth•Extreme salinities•Varied temperature
•Deeper depth•Stable salinity•Stable temperature
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Regional Dominance
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Non-Metric Multidimensional Scaling
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Non-Metric Multidimensional Scaling
Softer, muddier substrate
Harder, shelly substrate
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1. Low diversity, high dominance
2. Salinity, water depth, temperature (deep, stable v. shallow, unstable)
3. Substrate (soft/muddy v. hard/shelly)
Conclusions
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Dr. Steven Holland
Courtney Herbolsheimer, Annaka Clement, Jason Burwell, and Silvia Danise for assistance in the field
Cliff and Row Manuel
Thanks to the Geological Society of America, the American Museum of Natural History, and the University of Georgia for providing
funding
Thanks