Yale Point, AZ (A5-4): Cenomanian, Arizona
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Neogastropod indet.
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1 specimen | |||||||||
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Cephalopoda
- Ammonitida
- Baculitidae
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Sciponoceras sp.
Hyatt 1894
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2 specimens | |||||||||
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Gastropoda
- Cerithiopsidae
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Cerithiopsis sp.
Hanley 1849
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2 specimens | |||||||||
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Gastropoda
- Aporrhaidae
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Drepanocheilus ruidium
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1 specimen | |||||||||
| originally entered as "Drepanochilus ruidium" | ||||||||||
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Bivalvia
- Solemyida
- Solemyidae
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Solemya obscura
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1 specimen | |||||||||
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Bivalvia
- Ostreida
- Pteriidae
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Phelopteria sp.
Stephenson 1953
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1 specimen | |||||||||
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Bivalvia
- Ostreida
- Ostreidae
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Ostreidae indet.
Rafinesque 1815
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41 specimens | |||||||||
| originally entered as "Oyster indet." | ||||||||||
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Bivalvia
- Ostreida
- Gryphaeidae
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Exogyra acroumbonata
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16 specimens | |||||||||
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Pycnodonte newberryi
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85 specimens | |||||||||
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Bivalvia
- Lucinida
- Lucinidae
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Lucina sp.
Bruguière 1797
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8 specimens | |||||||||
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Bivalvia
- Carditida
- Astartidae
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? Astarte sp.
Sowerby 1816
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1 specimen | |||||||||
| originally entered as "Astarte(?) sp." | ||||||||||
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unclassified
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Mesostoma sp.
Ehrenberg 1837
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1 specimen | |||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Arizona | County: | Navajo |
| Coordinates: | 36.3° North, 109.8° West (view map) | ||||
| Paleocoordinates: | 37.5° North, 72.9° West | ||||
| Geographic resolution: | small collection |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Cenomanian | 10 m.y. bin: | Cretaceous 5 | *Epoch: | Gallic |
| *International age/stage: | Cenomanian - Cenomanian | ||
| Key time interval: | Cenomanian | Zone: | Sciponoceras Ammonite |
| Age range of interval: | 100.50000 - 93.90000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Mancos Shale | ||||
| Local section: | A5 | Local bed: | 4 (Unit 12) | ||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Upper Cenomanian. Bed horizon is the sample number not the lithologic unit number. The lithologic unit numbers that correspond to the sample numbers given can be found in reference for collection (Elder, 87). | |||||
Lithology and environment
| Primary lithology: | black,green lithified calcareous "shale" | ||
| Environment: | marine indet. | Tectonic setting: | cratonic basin |
| Geology comments: Poorly indurated, limestone nodule band 20 cm above base. Note: Section A5 constitutes interbedded limestones and shales, but this sedimentary structure is not reflected in the descriptions of each collection, as each is often a single bed, or a portion thereof. | |||
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | bulk,mechanical,field collection |
| Reason for describing collection: | paleoecologic analysis |
| Collection method comments: Bulk sample disaggregated in lab. | |
Metadata
| Database number: | 3078 | ||
| Authorizer: | C. Marshall | Enterer: | S. Low |
| Modifier: | M. Clapham | Research group: | marine invertebrate |
| Created: | 1999-07-23 19:09:10 | Last modified: | 2017-07-27 18:12:25 |
| Access level: | the public | Released: | 1999-07-23 19:09:10 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 93. | W. P. Elder. 1987. The paleoecology of the Cenomanian-Turonian (Cretaceous) stage boundary extinctions at Black Mesa, Arizona. Palaios 2(1):24-40 [C. Marshall/S. Low/A. Clement] |