Chattanur [Quilon Limestone]: Early/Lower Miocene, India
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Anthozoa
- Scleractinia
- Pocilloporidae
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Stylophora pulcherrima
d'Achiardi 1875
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Bivalvia
- Arcida
- Arcidae
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Anadara theobaldi
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Trisidos protortuosum
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Bivalvia
- Nuculida
- Nuculidae
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Nucula warsarensis
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Gastropoda
- Neogastropoda
- Conidae
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Conus (Leptoconus) hanza
(Noetling 1901)
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Gastropoda
- Rostellariidae
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Dientomochilus subrimosus
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Tubothalamea
- Miliolida
- Soritidae
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Archaias malabaricus
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see common names |
Geography
Country: | India |
Coordinates: | 8.9° North, 76.7° East (view map) |
Paleocoordinates: | 1.8° North, 72.8° East |
Basis of coordinate: | stated in text |
Geographic resolution: | outcrop |
Time
Period: | Neogene | Epoch: | Miocene |
10 m.y. bin: | Cenozoic 5 | ||
Key time interval: | Early/Lower Miocene | ||
Age range of interval: | 23.03000 - 15.98000 m.y. ago |
Stratigraphy
Formation: | Quilon Limestone | ||||
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: STRATIGRAPHIC RELATIONS: From the Quilon Limestone, which overlie unconformably Archean granites, and are regionally overlain by the Late Miocene Wakalay beds. THICKNESS: From 1-1.25 ft thick limestone within section of about 40 ft thick. AGE: Early MIocene based on multiple sources, including ostracod biostratigraphy (Khosla and Nagori, 1989) and vertebrate (Sahni and Mitra, 1980). STRATIGRAPHIC POSITION: From entire formation, which is found at the base of this section. |
Lithology and environment
Primary lithology: | gray,yellow,blue poorly lithified argillaceous "limestone" |
Includes fossils? | Y |
Lithology description: SPECIFIC LITHOLOGY: Limestone, impure, argillaceous, highly indurated, dull yellowish to bluish grey. The upper and lower parts are less compact and present less difficulty in extraction of fossils. LITHIFICATION: Ranging from lithified to poorly lithified. | |
Environment: | carbonate indet. |
Geology comments: ENVIRONMENT: Carbonate facies. Environment not discussed in text (at least that is available at present), but appears to be relatively shallow water. |
Taphonomy
Modes of preservation: | body |
Size of fossils: | macrofossils |
Collection methods and comments
Collection excludes: | some genera |
Collection methods: | surface (in situ),survey of museum collection |
Reason for describing collection: | biostratigraphic analysis |
Collection method comments: COLLECTOR: Unknown. REPOSITORY: Presumably BMNH. | |
Taxonomic list comments:COVERAGE: Limited to representative forms of gastropoda and bivalvia. NOMENCLATURE: Not an authoritative publication and somewhat antiquated, though nevertheless, consistent use of subgenera and species-resolution assignments permit nomenclatural vetting. |
Metadata
Also known as: | 58 D/9, C.2 | ||
Database number: | 77652 | ||
Authorizer: | A. Hendy | Enterer: | A. Hendy |
Modifier: | A. Hendy | Research group: | marine invertebrate |
Created: | 2008-01-16 10:24:52 | Last modified: | 2013-11-25 13:37:23 |
Access level: | authorizer only | Released: | 2009-01-16 10:24:52 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
26237. | F. E. Eames. 1950. On the ages of certain Upper Tertiary beds of Peninsula India and Ceylon. Geological Magazine 87:233-252 [A. Hendy/A. Hendy] |