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North-Central Section - 50th Annual Meeting - 2016

Paper No. 30-4
Presentation Time: 8:00 AM-12:00 PM

THE BIOTA OF THE CAMBRIAN WEEKS FORMATION LAGERSTäTTE, HOUSE RANGE, UTAH


HEGNA, Thomas1, CHRISTENSEN, Justin2, LIMING, Nick1, PETERS-KAFFENBERGER, Corrin1, STARR, Hunter1, TURNER, Andrew2, GAINES, Robert3, ORTEGA-HERNÁNDEZ, Javier4, VAN ROY, Peter5 and LEROSEY-AUBRIL, Rudy6, (1)Department of Geology, Western Illinois University, Tillman Hall 115, 1 University Circle, Macomb, IL 61455, (2)Geology Department, Western Illinois Univ, 1 University Circle, Macomb, IL 61455, (3)Geology Department, Pomona College, 185 E. 6th St, Claremont, CA 91711, (4)Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EQ, United Kingdom, (5)Department of Geology and Geophysics, Yale University, 210 Whitney Avenue, New Haven, CT 06520, (6)Division of Earth Sciences, School of Environmental & Rural Science, University of New England, Armidale, NSW, 2351, Australia, ta-hegna@wiu.edu

Recent fieldwork has expanded knowledge of the fauna from the Cambrian (Guzhangian Stage) Weeks Formation. The thin-bedded lime mudstones interbedded with shales yield rare soft-bodied fossils in the shaley partings, as well as well-preserved, articulated trilobites. Within the lime mudstones, there is a diverse shelly fauna dominated by trilobites and inarticulate brachiopods. The non-trilobite arthropod fauna is composed about 20 species (almost 40 with agnostids) and includes aglaspidids sensu lato, anomalocaridids, bradoriids, ‘megacheirans’, and several taxa of uncertain affinities. The non-arthropod fauna has become significantly more diverse with the discovery of new lophotrochozoans and several species of sponges.

Session No. 30--Booth# 43

T30. The Contribution of Taphonomy for Understanding the Fossil Record (Posters)
Tuesday, 19 April 2016: 8:00 AM-12:00 PM
Illinois Ballroom AB (I Hotel and Conference Center)
Geological Society of America Abstracts with Programs. Vol. 48, No. 5
doi: 10.1130/abs/2016NC-275556
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