Southern Blue Buttes (USNM 14122) (Paleocene of the United States)

Where: McKenzie County, North Dakota (47.8° N, 102.8° W: paleocoordinates 52.2° N, 82.5° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Bear Den Member (Golden Valley Formation), Clarkforkian (56.8 - 55.8 Ma)

• bed-level stratigraphic resolution

Environment/lithology: "channel"; sandstone and conglomeratic shale

• Sandstone; dominantly interchannel shale/siltstone (conglomeritic)

Size class: macrofossils

Preservation: adpression

Reposited in the USNM

Collection methods: quarrying,

Primary reference: L. J. Hickey. 1977. Stratigraphy and paleobotany of the Golden Valley Formation (Early Tertiary) of western North Dakota. The Geological Society of America Memoir 150:1-183 [H. Sims/S. Ostrowski/J. Cassara]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 10981: authorized by Hallie Sims, entered by Summer Ostrowski on 08.07.2001

Creative Commons license: CC BY (attribution)

Taxonomic list

Angiospermae
 Fagales - Betulaceae
Corylus acutertiaria Hickey 1977 hazel
 Saxifragales - Cercidiphyllaceae
Cercidiphyllum genetrix Newberry 1868 katsura
 Coniferales - Cupressaceae
Glyptostrobus europaeus Brongniart 1833 Chinese swamp cypress
Metasequoia occidentalis Chaney 1951 dawn redwood