ammonites
Central Whiskey Canyon, Bolander Group, Collection 92a-b (Carboniferous of the United States)

Where: Sierra County, New Mexico (33.2° N, 107.3° W: paleocoordinates 2.8° S, 40.4° W)

• outcrop-level geographic resolution

When: Bolander Group, Desmoinesian (313.8 - 305.9 Ma)

• Des Moines Series is divided into the Bolander Group and Armendaris Group; the latter contains 3 formations. Unit 92a = 24.0 ft. Unit 92b = 10.0 ft.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, gray, cherty/siliceous limestone and chert

• Unit 92a: Limestone, light-gray, hard, dense; fine-grained beds alternating with light-gray coarse-grained beds; white calcite veins common except near base; large nodules and irredular masses of chert throughout; lower 3 feet gray, red tinted, coarse grained, fossiliferous. Unit 92b: Chert; 1 solid bed stained with manganese; some silicified limestone, with traces of fusulinids on surface.

Size class: macrofossils

Primary reference: J. L. Gehrig. 1958. Middle Pennsylvanian Brachiopods From the Mud Springs Mountains and Derry Hills, New Mexico. State Bureau of Mines and Mineral Resources, Memoir 3 1-24 [T. Olszewski/K. Nell] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 10058: authorized by Tom Olszewski, entered by Katrina Nell on 12.02.2001