Yale Point, AZ (A5-6): 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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Gastropoda
- Naticidae
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Eunaticina textilis
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4 specimens | |||||||||
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Euspira concinna
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2 specimens | |||||||||
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Gastropoda
- Aporrhaidae
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Drepanocheilus ruidium
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17 specimens | |||||||||
| originally entered as "Drepanochilus ruidium" | ||||||||||
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Gastropoda
- Cerithiopsidae
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Cerithiopsis sp.
Hanley 1849
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1 specimen | |||||||||
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Gastropoda
- Turritellidae
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Turritella sp.
Lamarck 1799
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2 specimens | |||||||||
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Bivalvia
- Lucinida
- Lucinidae
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Lucina sp.
Bruguière 1797
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36 specimens | |||||||||
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Bivalvia
- Poromyida
- Poromyidae
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Liopistha sp.
Meek 1864
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4 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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Bivalvia
- Ostreida
- Ostreidae
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Ostreidae indet.
Rafinesque 1815
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15 specimens | |||||||||
| originally entered as "Oyster indet." | ||||||||||
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Bivalvia
- Ostreida
- Gryphaeidae
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Exogyra acroumbonata
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28 specimens | |||||||||
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Pycnodonte newberryi
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36 specimens | |||||||||
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Bivalvia
- Pectinida
- Pectinidae
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Camptonectes sp.
Meek 1864
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1 specimen | |||||||||
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Bivalvia
- Myalinida
- Inoceramidae
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Inoceramus pictus
Sowerby 1829
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1 specimen | |||||||||
| recombined as Inoceramus (Inoceramus) pictus | ||||||||||
| "pictus pictus" - originally entered as "Inoceramus pictus pictus" | ||||||||||
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Bivalvia
- Solemyida
- Solemyidae
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Solemya obscura
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1 specimen | |||||||||
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Cephalopoda
- Ammonoidea
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Ammonoidea indet.
Zittel 1884
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1 specimen | |||||||||
| originally entered as "Ammonite"; changed by JA 30.6.04 | ||||||||||
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Cephalopoda
- Ammonitida
- Baculitidae
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Sciponoceras sp.
Hyatt 1894
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13 specimens | |||||||||
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Cephalopoda
- Ammonitida
- Scaphitidae
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Worthoceras sp.
Adkins 1928
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1 specimen | |||||||||
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Cephalopoda
- Ammonitida
- Acanthoceratidae
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Euomphaloceras sp.
Spath 1923
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2 specimens | |||||||||
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Metoicoceras sp.
Hyatt 1903
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4 specimens | |||||||||
| originally entered as "Metiococeras sp." | ||||||||||
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Cephalopoda
- Ammonitida
- Placenticeratidae
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Placenticeras sp.
Meek 1876
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4 specimens | |||||||||
| 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: | 6 (Unit 15) | ||
| 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: | gray,green calcareous "shale" | ||
| Includes fossils? | Y | ||
| Environment: | marine indet. | Tectonic setting: | cratonic basin |
| Geology comments: Moderately indurated, poorly to moderately laminar. 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: | 3080 | ||
| Authorizer: | C. Marshall | Enterer: | S. Low |
| Modifier: | M. Clapham | Research group: | marine invertebrate |
| Created: | 1999-07-23 19:27:48 | Last modified: | 2017-07-27 18:12:45 |
| Access level: | the public | Released: | 1999-07-23 19:27:48 |
| 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] |