Pierre Shale

87 occ. 44 taxa (9 genera) 2 countries

Description

The Pierre Shale is a geologic formation or series in the Upper Cretaceous which occurs east of the Rocky Mountains in the Great Plains, from Pembina Valley in Canada to New Mexico.

Genera

9 genera

Platecarpus

Marine reptiles

Valid 10 occ. · 101 Ma

Valid 1 occ. · 101 Ma

Valid 1 occ. · 101 Ma

click to enlarge

A broken concretion with fossils inside; Late Cretaceous Pierre shale, near Ekalaka, Montana. © Wilson44691 · Public domain · Wikipedia

Temporal range

Triassic

Jurassic

Cretaceous

Paleogene

Neogene

252 201 145 66 0 Ma

Geological group / Member

Montana / Sharon Springs 31

Montana 13

Montana / Gammon Ferruginous 7

Pembina 6

Montana / Pembina 5

Montana / DeGrey 5

Sharon Springs 3

Montana / Virgin Creek 2

Top countries

🇺🇸 United States 73

🇨🇦 Canada 14

Depositional environments

Marine indet. 67

deep-water indet. 14

offshore 2

offshore indet. 2

Terrestrial indet. 2

Top collectors

J. Clark 5

W. D. and P. F. Turbull 5

B. Brown 4

H. Martin 3

J. D. Bump 3

Univ. Nebraska 3

Amherst College 2

D. R. Crandell 2

J. H. Charles 2

University of Kansas Geological Expedition 2

A. Peterson 1

B. F. Mudge 1

Collection activity by decade

1860s 1

1870s 2

1880s 1

1890s 2

1900s 8

1910s 1

1940s 7

1960s 3

1980s 1

1990s 5

2000s 3

2010s 2