Rose Creek Locality: Early/Lower Cenomanian - Middle Cenomanian, Nebraska
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
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Citrophyllum doylei n. sp. leaf
Upchurch and Dilcher 1990
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Rosidae order unknown | ||||||||||
Anisodromum wolfei n. gen., n. sp. leaf
Upchurch and Dilcher 1990
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Rosidae order unknown | ||||||||||
Reynoldsiophyllum nebrascense n. sp. leaf
Upchurch and Dilcher 1990
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Magnoliidae order unknown; magnoliid-grade foiage | ||||||||||
Acritodromum ellipticum n. gen., n. sp. leaf
Upchurch and Dilcher 1990
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Magnoliidae order unknown; magnoliid-grade foiage | ||||||||||
Didromophyllum basingerii n. gen., n. sp. leaf
Upchurch and Dilcher 1990
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Magnoliidae order unknown; magnoliid-grade foiage | ||||||||||
Longstrethia varidentata n. gen., n. sp. leaf
Upchurch and Dilcher 1990
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Magnoliidae, cf. Illiciales | ||||||||||
Pabiania variloba n. gen., n. sp. leaf
Upchurch and Dilcher 1990
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cf. Atherospermataceae, Gomortegaceae, Gyrocarpaceae, Lauraceae, Hernandiaceae, and Hortoniaceae | ||||||||||
Pandemophyllum kvacekii n. gen., n. sp. leaf
Upchurch and Dilcher 1990
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cf. Lauraceae | ||||||||||
Pandemophyllum attenuatum n. sp. leaf
Upchurch and Dilcher 1990
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cf. Lauraceae | ||||||||||
Densinervum kaulii n. gen., n. sp. leaf
Upchurch and Dilcher 1990
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cf. Chloranthaceae | ||||||||||
Magnoliopsida
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Dicotylophyllum expansolobum n. sp. leaf
Upchurch and Dilcher 1990
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Magnoliopsida subclass unknown | ||||||||||
Dicotylophyllum angularis n. sp. leaf
Upchurch and Dilcher 1990
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Magnoliidae order unknown; magnoliid-grade foiage | ||||||||||
Dicotylophyllum myrtophylloides n. sp. leaf
Upchurch and Dilcher 1990
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Magnoliopsida subclass unknown | ||||||||||
Dicotylophyllum rosafluviatilis n. sp. leaf
Upchurch and Dilcher 1990
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Magnoliopsida subclass unknown | ||||||||||
Dicotylophyllum aliquantuliserratum n. sp. leaf
Upchurch and Dilcher 1990
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Magnoliopsida subclass unknown | ||||||||||
Angiospermae
- Magnoliales
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Magnoliales informal New Genus A leaf
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cf. Winteraceae, Degeneriaceae, Eupomatiaceae, Annonaceae | ||||||||||
Angiospermae
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Magnoliidae informal New Genus B leaf
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synonym of Magnoliid | ||||||||||
Magnoliidae order unknown; magnoliid-grade foiage | ||||||||||
Angiospermae
- Laurales
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Pandemophyllum sp. leaf
Upchurch and Dilcher 1990
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cf. Lauraceae | ||||||||||
Crassidenticulum decurrens leaf
(Lesquereux 1892)
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n. comb., cf. Chloranthaceae | ||||||||||
Landonia calophylla n. gen., n. sp. leaf
Upchurch and Dilcher 1990
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cf. Amborellaceae, Monimiaceae, Gomortegaceae, Hernandiaceae | ||||||||||
see common names |
Geography
Country: | United States | State/province: | Nebraska | County: | Jefferson |
Coordinates: | 40.1° North, 97.2° West (view map) | ||||
Paleocoordinates: | 38.2° North, 59.5° West | ||||
Basis of coordinate: | estimated from map | ||||
Altitude: | 1450 feet | ||||
Geographic resolution: | small collection |
Time
Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
Stage: | Cenomanian | 10 m.y. bin: | Cretaceous 5 |
*Period: | Middle Cretaceous | *Epoch: | Gallic |
*International age/stage: | Early/Lower Cenomanian - Middle Cenomanian | ||
Key time interval: | Early/Lower Cenomanian - Middle Cenomanian | ||
Age range of interval: | 100.50000 - 93.90000 m.y. ago | ||
* legacy (obsolete) database fields |
Stratigraphy
Formation: | Dakota | Member: | Janssen Clay | ||
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: Isolated clay lens |
Lithology and environment
Primary lithology: | gray unlithified claystone |
Secondary lithology: | sandstone |
Includes fossils? | Y |
Lithology description: Upchurch & Dilcher 1990 (6420); the Janssen Clay Member, which comprises largely sandstones, grey claystones, and lignites. Nearly all identifiable leaf remains occur within a 2-m-thick interval of light gray, jointed, overbank mudstones. | |
Environment: | fluvial indet. |
Geology comments: Fluvial ox bow lake type |
Taphonomy
Modes of preservation: | adpression,original carbon |
Size of fossils: | macrofossils |
Preservation of anatomical detail: | good |
Temporal resolution: | snapshot |
Spatial resolution: | parautochthonous |
Collection methods and comments
Collection methods: | surface (in situ),chemical,field collection |
Reason for describing collection: | taxonomic analysis |
Metadata
Database number: | 20815 | ||
Authorizer: | H. Sims | Enterer: | H. Lindon |
Modifier: | H. Sims | Research group: | paleobotany |
Created: | 2002-06-07 13:26:04 | Last modified: | 2012-04-19 16:18:19 |
Access level: | the public | Released: | 2002-06-07 13:26:04 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
6420. | G. R. Upchurch and D. L. Dilcher. 1990. Cenomanian Angiosperm Leaf Megafossils, Dakota Formation, Rose Creek Locality, Jefferson County, Southeastern Nebraska. U.S. Geological Survey Bulletin 1915 [H. Sims/H. Lindon/H. Lindon] |