Also known as ETE Locality 1515, Agate Spring Quarry 3, Den Site

Where: Sioux County, Nebraska (42.4° N, 103.9° W: paleocoordinates 43.3° N, 98.8° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Marsland Formation (Hemingford Group), Harrisonian (24.8 - 18.5 Ma)

• ETE dating method: time_unit, ETE age comment: .

•= Upper Harrison beds

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial; sandstone

Size class: macrofossils

Collection methods: ETE Size: .; ETE reference list: 478, ; ETE museum list:

Primary reference: R. M. Hunt. 1990. Taphonomy and sedimentology of Arikaree (lower Miocene) fluvial, eolian, and lacustrine paleoenvironments, Nebraska and Wyoming; a paleobiota entombed in fine-grained wolcaniclastic rocks,. In: Lockley, M.G. and Rice, A., eds. Volcanism and Fossil Biotas. Boulder, Colorado, Geological Society of America, Special Paper 244 69-111 [A. Behrensmeyer/A. Behrensmeyer/M. Kosnik]more details

Purpose of describing collection: taphonomic analysis

PaleoDB collection 22641: authorized by Anna Behrensmeyer, entered by Anna Behrensmeyer on 27.03.2001, edited by John Alroy and Jonathan Marcot

Creative Commons license: CC BY (attribution)