Haystack Valley Member (non-specific) ( of the United States)

Also known as John Day Formation

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 (30.8 - 20.4 Ma)

• member-level stratigraphic resolution

Environment/lithology: terrestrial; gray, green tuff and gray, green siltstone

• gray-green ribbed tuff; gray-green siltstone to very fine sandstone; also celadonite bench (siltstone), yellow-green tuffaceous claystone, and gray massive tuff with well-developed paleosol

Size classes: macrofossils, mesofossils

Reposited in the UCMP

Primary reference: D. S. Berman. 1976. A new amphisbaenian (Reptilia: Amphisbaenia) from the Oligocene-Miocene John Day Formation, Oregon,. Journal of Paleontology 50(1):165-174 [C. Bell/C. Bell]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 180567: authorized by Paul Barrett, entered by Terri Cleary on 21.07.2016

Creative Commons license: CC BY (attribution)

Taxonomic list

 Squamata - Rhineuridae
Dyticonastis rensbergeri Berman 1976 worm lizard
UCMP 76883, nearly complete skull with left mandible