M1236 - Lake Creek section (Jurassic of the United States)

Also known as M1236

Where: Alaska (55.7° N, 161.1° W: paleocoordinates 40.4° N, 98.9° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Staniukovich Formation, Tithonian (152.1 - 145.0 Ma)

• Exposures only fair to poor, but the best locally available. Beds dip consistently southwest. Collection from Staniukovich Formation near base of section. Staniukovich Formation locally exceeds 850 feet and comprises sandstones with some siltstone and claystone in upper part. Listed as Portlandian in age = Tithonian.

• bed-level stratigraphic resolution

Environment/lithology: marine; fine-grained, medium, brown, gray, green, argillaceous sandstone and brown, gray, green siltstone

• No paleoenvironmental data reported.
• Sandstone and siltstone, gray green to brown or tan, weathering yellowish tan, medium- to fine grained, moderately well sorted, argillaceous, locally feldspathic with few streaks of shaly siltstone and claystone.

Size class: macrofossils

Collection methods: quarrying,

• Collections examined by D. Jones (USGS), 1962. Collections are reposited at USGS Menlo Park, or presumably USNM (not reported)

Primary reference: C.A. Burk. 1965. Geology of the Alaska Peninsula-island arc and continental margin (Part 1). Geological Society of America Memoir 99(1) [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 44066: authorized by Austin Hendy, entered by Austin Hendy on 31.08.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Bivalvia
 Pectinida - Buchiidae
Buchia piochii
Buchia piochii Gabb 1864 scallop
Cephalopoda
 Coleoidea -
Coleoidea indet.
Coleoidea indet. Bather 1888