Fucoid-ostracod community, Mormon Creek/Cabot Head/Byron/Plectatrypa/Schoolcraft (Silurian of the United States)
Where: Michigan (46.2° N, 86.2° W: paleocoordinates 19.6° S, 50.3° W)
• coordinate based on political unit
• basin-level geographic resolution
When: Llandovery (443.7 - 428.2 Ma)
• "Lower Sil (A+B). Mormon Creek (uppermost Ashgill)/Cabot Head/Byron/Plectatrypa/Schoolcraft Fms."
Environment/lithology: marine; dolomite
• "F.g. dolomite w/ parallel to sl wavy lamination; occ. carbonaceous partings b/w laminae. shallow, poor circ. reduced O2, hypersaline, intermitent exposure. cratonic. BA1"
Primary reference: J. J. Sepkoski Jr. 1998. Rates of speciation in the fossil record. Philosophical Transaction of the Royal Society Biological Sciences 353(1366):315-326 [J. Sepkoski/M. Sommers/A. Clement] more details
Purpose of describing collection: paleoecologic analysis
PaleoDB collection 532: authorized by Arnold Miller, entered by Mike Sommers on 07.01.1999