Where: Oregon (44.9° N, 117.3° W: paleocoordinates 21.3° N, 52.0° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Martin Bridge Formation, Lacian (221.5 - 215.6 Ma)

• Lower Norian

• group of beds-level stratigraphic resolution

Environment/lithology: offshore; lithified shale

Size class: macrofossils

Primary reference: C. A. McRoberts. 1993. Systematics and biostratigraphy of halobiid bivalves from the Martin Bridge Formation (Upper Triassic), Northeast Oregon. Journal of Paleontology 67(2):198-210 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 61744: authorized by Wolfgang Kiessling, entered by Uta Merkel on 28.06.2006

Creative Commons license: CC BY (attribution)