Where: Delta County, Michigan (45.7° N, 87.0° W: paleocoordinates 19.5° S, 55.4° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Ogontz Member (Stonington Formation), Richmondian (449.5 - 443.7 Ma)

• member-level stratigraphic resolution

Environment/lithology:

Size class: macrofossils

Primary reference: R. J. Elias and D. Lee. 1993. Microborings and growth in Late Ordovician halysitids and other corals. Journal of Paleontology 67(6):922-934 [S. Holland/T. Hanson/T. Hanson] more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 28027: authorized by Steven Holland, entered by Tori Hanson on 20.01.2003