Where: Delta County, Michigan (42.2° N, 83.9° W: paleocoordinates 24.5° S, 59.6° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Trenton Formation, Rocklandian to Rocklandian (457.3 - 449.6 Ma)

• Probably Chandler Falls

• formation-level stratigraphic resolution

Environment/lithology: limestone

Size class: macrofossils

Reposited in the UMMP

Primary reference: E.C. Stumm and E.G. Kauffman. 1958. Calymenid trilobites from the Ordovician rocks of Michigan. Journal of Paleontology 32(5):943-960 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 75970: authorized by Pete Wagner, entered by Pete Wagner on 07.11.2007

Creative Commons license: CC BY (attribution)