Where: Oregon (44.1° N, 120.3° W: paleocoordinates 43.8° N, 109.5° W)

• coordinate stated in text

When: Big Basin Member (John Day Formation), Early/Lower Oligocene (33.9 - 28.4 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: lacustrine; tuffaceous shale

Size classes: macrofossils, mesofossils

Preservation: mold/impression, adpression

Primary reference: T. D. A. Cockerell. 1927. Tertiary Fossil Insects from Eastern Oregon. In R. Kellogg, J. Merriam, C. Stock, R. Chaney, H. Mason (eds.), Additions to the Paleontology of the Pacific Coast and Great Basin Regions of North America 346:64-65 [M. Clapham/A. Aguilar/P. Holroyd]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 117157: authorized by Matthew Clapham, entered by Alex Aguilar on 16.09.2011

Creative Commons license: CC BY (attribution)