Marks (1951) - Upper Calcareous Mbr, Daule Fm: Middle Miocene, Ecuador
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Gastropoda
- Heterostropha
- Architectonicidae
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Architectonica sexlinearis
(Nelson 1870)
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| synonym of Architectonica nobilis | ||||||||||
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Gastropoda
- Turritellidae
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Turritella infracarinata
Grzybowski 1899
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| recombined as Turritella (Turritella) infracarinata | ||||||||||
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Gastropoda
- Neogastropoda
- Buccinidae
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Hanetia sp.
Jousseaume 1880
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Tritiaria mexicana
(Bose 1906)
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| recombined as Antillophos (Antillophos) mexicanus | ||||||||||
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Gastropoda
- Neogastropoda
- Conidae
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Conus multiliratus
(Olsson 1922)
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| recombined as Conasprelloides multiliratus | ||||||||||
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Bivalvia
- Cardiida
- Cardiidae
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Dinocardium ecuadorialis
(Olsson 1932)
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| recombined as Dinocardium ecuadoriale | ||||||||||
| [entered as Dinocardium ecuadoriale] | ||||||||||
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Bivalvia
- Hiatellida
- Hiatellidae
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Panope cf. coquimbensis
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| corrected as Panopea | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Ecuador | State/province: | Guayas |
| Coordinates: | 1.7° South, 80.3° West (view map) | ||
| Paleocoordinates: | 2.5° South, 77.3° West | ||
| Basis of coordinate: | based on nearby landmark | ||
| Geographic resolution: | local area |
Time
| Period: | Neogene | Epoch: | Miocene |
| 10 m.y. bin: | Cenozoic 5 | ||
| Key time interval: | Middle Miocene | ||
| Age range of interval: | 15.98000 - 11.63000 m.y. ago |
Stratigraphy
| Formation: | Daule | Member: | Blue Siltstone | ||
| Local section: | Jerusalem | ||||
| Regional section: | Daule | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: From lowermost part of upper calcareous mbr, Daule Fm, which is of Middle Miocene age comprises three members, a "basal calcareous" member, a middle "blue siltstone" member, and an "upper calcareous" member. The exact thickness of the unit has not been measured accurately in this section because of structural complications. The upper calcareous member, from which this collecion is derived is several hundred ft thick. Faunal compositions suggests a Middle Miocene age, with affinities to the Progreso Fm, and Middle Miocene formations of Peru. Taxa are share with the Gatun fm, the Tubera Fm, the Cucurrupi Fm of Colombia. | |||||
Lithology and environment
| Primary lithology: | lithified calcareous sandstone |
| Includes fossils? | Y |
| Lithology description: Calcareous indurated sandstone. | |
| Environment: | shoreface |
| Glacial or sequence phase: | regressive |
| Geology comments: Shallow, nearshore, siliciclastic environment, with normal salinity conditions, deposited during regressive phase. | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection excludes: | all microfossils |
| Collection methods: | selective quarrying,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: | 61092 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2006-05-29 16:07:09 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | the public | Released: | 2006-05-29 16:07:08 |
| 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] |