Blue Point, AZ (A1-1): Late/Upper Cenomanian, Arizona
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Polychaeta
- Sabellida
- Serpulidae
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Serpula intrica
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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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16 specimens | |||||||||
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Cephalopoda
- Ammonitida
- Acanthoceratidae
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Metoicoceras sp.
Hyatt 1903
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3 specimens | |||||||||
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Bivalvia
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Bivalvia indet.
Linnaeus 1758
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1 specimen | |||||||||
| "infaunal" [originally entered as "Bivalve indet."] | ||||||||||
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Bivalvia
- Ostreida
- Bakevelliidae
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Pseudoptera sp.
Meek 1873
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3 specimens | |||||||||
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Bivalvia
- Ostreida
- Malleidae
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Vulsella sp.
Ršding 1798
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3 specimens | |||||||||
| originally entered as "Volsella sp." | ||||||||||
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Bivalvia
- Ostreida
- Gryphaeidae
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Exogyra levis
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2 specimens | |||||||||
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Exogyra acroumbonata
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4 specimens | |||||||||
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Pycnodonte newberryi
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5 specimens | |||||||||
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Gryphaeostrea sp.
Conrad 1865
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66 specimens | |||||||||
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Bivalvia
- Pectinida
- Limidae
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Lima sp.
Bruguière 1797
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1 specimen | |||||||||
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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 flavus
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4 specimens | |||||||||
| "flavus flavus" - originally entered as "Inoceramus flavus flavus" | ||||||||||
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Bivalvia
- Mytilida
- Mytilidae
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Lithophaga sp.
Röding 1798
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3 specimens | |||||||||
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Bivalvia
- Pholadida
- Corbulidae
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Corbula sp.
Bruguière 1789
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1 specimen | |||||||||
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Bivalvia
- Cardiida
- Mactridae
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Cymbophora sp.
Gabb 1869
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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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1 specimen | |||||||||
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Gastropoda
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Gastropoda indet.
Cuvier 1795
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1 specimen | |||||||||
| originally entered as "Gastropod indet." | ||||||||||
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Gastropoda
- Turritellidae
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Turritella sp.
Lamarck 1799
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5 specimens | |||||||||
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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: | Cocconino |
| Coordinates: | 35.7° North, 110.8° West (view map) | ||||
| Paleocoordinates: | 37.1° North, 74.1° West | ||||
| Geographic resolution: | small collection |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Cenomanian | 10 m.y. bin: | Cretaceous 5 |
| *Period: | Middle Cretaceous - Late/Upper Cretaceous | *Epoch: | Gallic |
| *International age/stage: | Late/Upper Cenomanian - Late/Upper Cenomanian | ||
| Key time interval: | Late/Upper Cenomanian | Zone: | Sciponoceras |
| Age range of interval: | 100.50000 - 93.90000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Mancos Shale | ||||
| Local section: | A1 | Local bed: | 1 (Unit 3) | ||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: 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: | burrows lithified silty,calcareous sandstone | ||
| Environment: | marine indet. | Tectonic setting: | cratonic basin |
| Geology comments: Very fine grained, olive gray, well indurated. Note: Section A1 constitutes interbedded limestones, sandstones, 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: | 2171 | ||
| Authorizer: | C. Marshall | Enterer: | S. Low |
| Modifier: | M. Clapham | Research group: | marine invertebrate |
| Created: | 1999-06-23 15:02:33 | Last modified: | 2017-07-27 18:39:12 |
| Access level: | the public | Released: | 1999-06-23 15:02:33 |
| 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] |