Yale Point, AZ (A5-10): Late/Upper 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
- Ammonoidea
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Ammonoidea indet.
Zittel 1884
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1 specimen | |||||||||
| "small smooth": originally entered as "Ammonite"; changed by JA 30.6.04 | ||||||||||
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Cephalopoda
- Ammonitida
- Scaphitidae
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Worthoceras sp.
Adkins 1928
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2 specimens | |||||||||
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Cephalopoda
- Ammonitida
- Baculitidae
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Sciponoceras sp.
Hyatt 1894
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31 specimens | |||||||||
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Cephalopoda
- Ammonitida
- Hamitidae
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Stomohamites sp.
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2 specimens | |||||||||
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Cephalopoda
- Ammonitida
- Acanthoceratidae
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Metoicoceras sp.
Hyatt 1903
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2 specimens | |||||||||
| originally entered as "Metiococeras sp." | ||||||||||
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Euomphaloceras sp.
Spath 1923
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7 specimens | |||||||||
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Bivalvia
- Lucinida
- Lucinidae
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Lucina sp.
Bruguière 1797
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35 specimens | |||||||||
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Bivalvia
- Pholadida
- Corbulidae
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Corbula sp.
Bruguière 1789
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5 specimens | |||||||||
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Bivalvia
- Poromyida
- Poromyidae
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Liopistha sp.
Meek 1864
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2 specimens | |||||||||
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Bivalvia
- Ostreida
- Gryphaeidae
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Exogyra acroumbonata
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1 specimen | |||||||||
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Pycnodonte newberryi
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77 specimens | |||||||||
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Bivalvia
- Ostreida
- Ostreidae
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Ostreidae indet.
Rafinesque 1815
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3 specimens | |||||||||
| originally entered as "Oyster indet." | ||||||||||
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Bivalvia
- Pectinida
- Plicatulidae
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Plicatula sp.
Lamarck 1801
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2 specimens | |||||||||
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Bivalvia
- Pectinida
- Pectinidae
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Camptonectes sp.
Meek 1864
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4 specimens | |||||||||
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Bivalvia
- Myalinida
- Inoceramidae
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Inoceramidae indet.
Giebel 1852
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1 specimen | |||||||||
| originally entered as "informal Inoceramid indet."; changed by JA 21.2.07 | ||||||||||
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Inoceramus pictus
Sowerby 1829
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1 specimen | |||||||||
| recombined as Inoceramus (Inoceramus) pictus | ||||||||||
| "pictus gracilestiatus" - originally entered as "Inoceramus pictus gracilestiatus" | ||||||||||
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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
- Naticidae
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Euspira concinna
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6 specimens | |||||||||
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Gastropoda
- Cerithiopsidae
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Cerithiopsis sp.
Hanley 1849
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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: | Late/Upper Cenomanian - Late/Upper Cenomanian | ||
| Key time interval: | Late/Upper 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: | 10 (Unit 19) | ||
| 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 lithified calcareous "shale" | ||
| Environment: | marine indet. | Tectonic setting: | cratonic basin |
| Geology comments: Moderately poorly 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: | 3084 | ||
| Authorizer: | C. Marshall | Enterer: | S. Low |
| Modifier: | M. Clapham | Research group: | marine invertebrate |
| Created: | 1999-07-23 20:06:03 | Last modified: | 2017-07-27 18:13:21 |
| Access level: | the public | Released: | 1999-07-23 20:06:03 |
| 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] |