Leptaena

By davidcpowers

• January 20, 2019

Taxonomy

Kingdom: Animalia
Phylum: Brachiopoda
Class: Stophomenata
Order: Strophomenida
Family: Rafinesquinidae
Genus: Leptaena
Species: Leptaena sp.
Author Citation Dolman 1828

Geological Time Scale

Eon: Phanerozoic
Era: Paleozoic
Period: Carboniferous
Epoch: Mississippian

Stratigraphy

Big Snowy Group
Kibbey Formation

Provenance

Collector: David C. Powers
Date Collected: 01/13/2019
Acquired by: Field Collection

Dimensions

Width: 1.7 cm
Height: 1.4 cm

Location

highway 89 S above rest-stop before Riceville
Cascade County
Montana
United States

• brachiopod
• kibbey formation
• leptaena
• mississippian
• montana
• mudstone
• rafinesquinidae
• strophomenata
• strophomenida

Comments

I collected this Leptaena brachiopod from the red brown mudstone resting three feet above the top of the first out crop of breccia limestone. The location is above the rest-stop on highway 89 S before Riceville Rd. The formation is the lower part of the Kibbey. Leptaena Brachiopods dominate along with three types of bryozoa and crinoids. Also found clams and a part of a plant fossil. The setting was once a lagoon.