Also known as Haystack Valley Member

Where: Wheeler County, Oregon (44.8° N, 119.7° W: paleocoordinates 44.5° N, 110.8° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Haystack Valley Member (John Day Formation), early Late Arikareean (29.5 - 18.5 Ma)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; brown siltstone

Size class: macrofossils

Primary reference: R. M. Hunt, Jr. and E. Stepleton. 2004. Geology and paleontology of the upper John Day beds, John Day river valley, Oregon: lithostratigraphic and biochronologic revision in the Haystack Valley and Kimberly areas (Kimberly and Mt. Misery quadrangles). Bulletin of the American Museum of Natural History 282:1-90 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 36765: authorized by John Alroy, entered by John Alroy on 14.02.2004, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)