Diatom Locality 14 I 80-39D, Castle Creek (Miocene of the United States)

Also known as USGS 14 I 80-39D

Where: Owyhee County, Idaho (43.1° N, 116.3° W: paleocoordinates 43.5° N, 114.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Chalk Hills Formation, Late/Upper Miocene (11.6 - 5.3 Ma)

• bed-level stratigraphic resolution

Environment/lithology: lacustrine; siltstone and ash

• This section consists of 64 m of sand, diatomaceous silt, and layers of volcanic ash and basaltic cinders. The samples were collected 34 m and 12 m below the top of the section (text-fig. 1

Size class: microfossils

Primary reference: E. Theriot and J. P. Bradbury. 1987. Mesodictyon, a New Fossil Genus of the Centric Diatom Family Thalassiosiraceae from the Miocene Chalk Hills Formation, Western Snake River Plain, Idaho. Micropaleontology 33(4):356-367 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 191559: authorized by Pete Wagner, entered by Pete Wagner on 01.02.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

Diatomophyceae
 Centrales - Thalassiosiraceae
Mesodictyon undulatum n. sp. Theriot and Bradbury 1987