Urbandale coal mine: Pennsylvanian, Iowa

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Pinopsida - Cordaitanthales - Cordaitanthaceae
Nucellangium glabrum seed/fruit Andrews 1949
see common names

Geography
Country:United States State/province:Iowa County:Polk
Coordinates: 41.6° North, 93.6° West (view map)
Paleocoordinates:3.0° South, 27.2° West
Basis of coordinate:based on nearby landmark
Time
Period:Carboniferous Epoch:Pennsylvanian
10 m.y. bin:Carboniferous 4-5
Key time interval:Pennsylvanian
Age range of interval:323.20000 - 298.90000 m.y. ago
Stratigraphy
Stratigraphy comments: "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"
Lithology and environment
Primary lithology: coal
Secondary lithology: coal ball
Includes fossils?Y
Taphonomy
Modes of preservation:permineralized
Size of fossils:macrofossils
Preservation of anatomical detail:excellent
Disassociated minor elements:some
Collection methods and comments
Collection methods:peel or thin section,field collection
Reason for describing collection:taxonomic analysis
Collection method comments: "The specimens on which the present descriptions are based were collected by Mr. Frederick O. Thompson"
Metadata
Database number:39076
Authorizer:H. Sims Enterer:J. Cassara
Modifier:J. Cassara Research group:paleobotany
Created:2004-05-19 15:22:34 Last modified:2004-05-19 18:22:34
Access level:the public Released:2004-05-19 15:22:34
Creative Commons license:CC BY
Reference information

Primary reference:
10559. 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]