Marks (1951) Loc. # 7500-A (Progreso Fm): Early Miocene, Ecuador
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Bivalvia
- Pectinida
- Pectinidae
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Pecten amenensis
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Bivalvia
- Lucinida
- Lucinidae
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Lucinisca sp.
Dall 1901
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Anodontia stainforthi
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Bivalvia
- Hiatellida
- Hiatellidae
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Panope cf. coquimbensis
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Bivalvia
- Cardiida
- Anatinellidae
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Anatina undulata
(Gould 1851)
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Bivalvia
- Cardiida
- Veneridae
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Dosinia delicatissima
Brown and Pilsbry 1913
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Clementia dariena
(Conrad 1855)
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Pitar aff. cosanguineus
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Pitar (Lamelliconcha) sp.
Dall 1902
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Bivalvia
- Cardiida
- Tellinidae
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Tellina amenensis
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Bivalvia
- Carditida
- Crassatellidae
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Eucrassatella peruviana
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Gastropoda
- Turritellidae
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Turritella altilirata
Grzybowski 1899
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Turritella infracarinata
Grzybowski 1899
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Gastropoda
- Neotaenioglossa
- Calyptraeidae
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Crucibulum ecuadorense
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Gastropoda
- Neogastropoda
- Thaisidae
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Chorus cruziana
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Gastropoda
- Naticidae
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Polinices coronis
(Hanna and Israelsky 1925)
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| see common names | |||||||
Geography
| Country: | Ecuador | State/province: | Guayas |
| Coordinates: | 2.3° South, 80.4° West (view map) | ||
| Paleocoordinates: | 3.5° South, 76.3° West | ||
| Basis of coordinate: | based on nearby landmark | ||
| Geographic resolution: | outcrop |
Time
| Period: | Neogene | Epoch: | Miocene |
| 10 m.y. bin: | Cenozoic 5 | ||
| Key time interval: | Early Miocene | ||
| Age range of interval: | 23.03 - 15.98 m.y. ago |
Stratigraphy
| Formation: | Progreso | ||||
| Local section: | Progreso | ||||
| Local order: | bottom to top | ||||
| Regional section: | Progreso | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: From Progresso Fm, which is of Middle Miocene age, overylies the Subibaja Fm (lower Early Miocene). The thickness of the formation is about 200 ft throughout its outcrop area. It is regionally correlated with the Variegated, Upper Zorritos, Cardalitos (Peru) and Onzole and Borbón (Ecuador) formations. | |||||
Lithology and environment
| Primary lithology: | pebbly,tuffaceous,green poorly lithified argillaceous,silty,conglomeratic,calcareous sandstone |
| Includes fossils? | Y |
| Lithology description: Clay, silty, green sandstone; soft, silty, and silty shale, with local accumulations of bentonite, bentonitic shale, tuff, pebbly sandstone, oyster-rich sandstone with duriable calcareous cement, and fine conglomerate. | |
| Environment: | coastal indet. |
| Geology comments: Shallow marine and brackish water with typical tropical assemblage. | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection excludes: | all microfossils |
| Collection methods: | field collection |
| Reason for describing collection: | biostratigraphic analysis |
| Museum repositories: | PRI |
| Collection method comments: Fossil material derived from the International Ecuadorian Petroleum Company (subsidiary of Standard Oil Co.) and was collected by the author (then employed by oil company) during field exploration and drilling operations. All type and voucher material reposited in PRI collections. | |
| Taxonomic list comments:Exhaustive for gastropoda and bivalvia. | |
Metadata
| Database number: | 61065 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2006-05-29 11:18:42 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | the public | Released: | 2006-05-29 11:18:41 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 17441. | J. G. Marks. 1951. Miocene stratigraphy and paleontology of Southwestern Ecuador. Bulletins of American Paleontology 33(139):1-448 [A. Miller/A. Hendy] |