Urbandale coal mine (Carboniferous of the United States)

Where: Polk County, Iowa (41.6° N, 93.6° W: paleocoordinates 3.0° S, 27.2° W)

• coordinate based on nearby landmark

When: Pennsylvanian (323.2 - 298.9 Ma)

• "the precise stratigraphical equivalence of the Urbandale coal is not known but presumably the material is a little younger than floras known from Illinois No. 6 coal or from above the upper Freeport coal of Pennsylvania"

Environment/lithology: coal and coal ball

Size class: macrofossils

Preservation: permineralized

Collection methods: peel or thin section,

• "The specimens on which the present descriptions are based were collected by Mr. Frederick O. Thompson"

Primary reference: H. N. Andrews, Jr. 1949. Nucellangium, a new genus of fossil seeds previously assigned to Lepidocarpon. Annals of the Missouri Botanical Garden 36:479-505 [H. Sims/J. Cassara/J. Cassara]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 39076: authorized by Hallie Sims, entered by Jason Cassara on 19.05.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

 Cordaitanthales - Cordaitanthaceae
Nucellangium glabrum Andrews 1949