Gulf of California section 1 "community" fauna: Late/Upper Pleistocene, Mexico
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Crassitella sp.
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1 %-specimens | ||||||
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Echinoidea
- Clypeasteroida
- Mellitidae
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Encope sp.
Agassiz 1840
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Thecostraca
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Cirripedia indet.
Rafinesque 1816
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Gastropoda
- Naticidae
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Polinices recluzianus
(Deshayes 1839)
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1 %-specimens | ||||||
| recombined as Glossaulax reclusiana | |||||||
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Gastropoda
- Neogastropoda
- Conidae
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Conus sp.
Linnaeus 1758
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1 %-specimens | ||||||
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Bivalvia
- Cardiida
- Veneridae
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Chione gnidia
(Broderip and Sowerby I 1829)
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95 %-specimens | ||||||
| recombined as Chionopsis gnidia | |||||||
| see common names | |||||||
Geography
| Country: | Mexico | State/province: | Sonora |
| Coordinates: | 31.8° North, 114.1° West (view map) | ||
| Paleocoordinates: | 31.8° North, 114.1° West | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | local area |
Time
| Period: | Quaternary | Epoch: | Pleistocene |
| Stage: | Late/Upper Pleistocene | 10 m.y. bin: | Cenozoic 6 |
| Key time interval: | Late/Upper Pleistocene | ||
| Age range of interval: | 0.12900 - 0.01170 m.y. ago |
Stratigraphy
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: Pleistocene fluvial, eolian, and deltaic deposits exposed in sea cliffs, overlain by coquina bed (dated at 125,00 bp) | |||||
Lithology and environment
| Primary lithology: | burrows,bioturbation,green unlithified argillaceous sandstone | ||
| Includes fossils? | Y | ||
| Lithology description: green, bioturbated, muddy snadtsone with abundant carbonate-cemented Thalassinoides burrows | |||
| Environment: | offshore | Tectonic setting: | rift |
| Geology comments: active trans-tensional rift basin | |||
Taphonomy
| Modes of preservation: | mold/impression |
| Degree of concentration: | dispersed |
| Size of fossils: | macrofossils |
| Spatial orientation: | life position |
| Preservation of anatomical detail: | excellent |
| Articulated whole bodies: | some |
| Disassociated major elements: | many |
| Fragmentation: | none |
| Bioerosion: | occasional |
| Encrustation: | occasional |
| Spatial resolution: | autochthonous |
Collection methods and comments
| Collection methods: | bulk,field collection |
| Reason for describing collection: | taphonomic analysis |
| Collection method comments: No comments on collection metholodolgy | |
Metadata
| Also known as: | Section 1 - community shell bed type | ||
| Database number: | 34923 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2003-10-19 21:37:16 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | group members | Released: | 2004-10-19 21:37:16 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 9379. | 1% 4820 | K.H. Meldahl and A. H. Cutler. 1992. Neotectonics and taphonomy; Pleistocene molluscan shell accumulations in the northern Gulf of California. Palaios 7(2):187-197 [A. Miller/A. Hendy/A. Hendy] |