Woodring Loc. 76 - Madden Basin [lower Alhajuela Fm]: Middle Miocene, Panama
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Bivalvia
- Ostreida
- Gryphaeidae
|
||||||||||
|
Hyotissa haitensis
(Sowerby 1850)
|
Woodring 1982 | C category | ||||||||
|
Bivalvia
- Pectinida
- Pectinidae
|
||||||||||
|
Nodipecten clydonus n. sp.
Woodring 1982
|
Woodring 1982 | F category | ||||||||
| synonym of Nodipecten colinensis | ||||||||||
|
Amusium toulae
(Brown and Pilsbry 1911)
|
Woodring 1982 | F category | ||||||||
|
Flabellipecten gatunensis
(Toula 1909)
|
Woodring 1982 | C category | ||||||||
| recombined as Leopecten gatunensis | ||||||||||
| SUBSPECIES: Flabellipecten gatunensis gatunensis | ||||||||||
|
Bivalvia
- Arcida
- Arcidae
|
||||||||||
|
Arca imbricata
Bruguière 1789
|
R category | |||||||||
| recombined as Lamarcka imbricata | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Panama |
| Coordinates: | 9.2° North, 79.6° West (view map) |
| Paleocoordinates: | 8.8° North, 77.8° West |
| Basis of coordinate: | estimated from map |
| Geographic resolution: | outcrop |
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: | Alhajuela | Member: | lower Alhajuela | ||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: The Caimito Formation in Madden Basin includes both Oligocene and lower Miocene deposits. The thickness in the basin appears to be 450 m. The deposits now referred to the Caimito Formation were initially designated the Culebra Formation, Emperaqdor Limestone, Caimito Formation, and Gatun Formation. Five members are tentatively recognized in the Caimito Formation. Two members are grouped as the lower part, the upper three members form the upper part. In stratigraphic order these include: basal calcareous sandstone-siltstone member (200 m) overlies the Bohio Formation, or laps onto the Gatuncillo Formation; the pyroclastic-clay member (50 m); Chilibrillo Limestone member (150 m); calcareous sandstone member (30 m); Alhajuela Sandstone member (85 m). The lower part of the Caimito Fm (2 basal members) is late Oligocene, the upper part (3 upper members) is early Miocene; Alhajuela Sandstone revised to formation rank in subsequent publications. From the lower member of the formation. | |||||
Lithology and environment
| Primary lithology: | fine,coarse,tuffaceous poorly lithified sandstone |
| Includes fossils? | Y |
| Lithology description: Massive, fine-coarse-grained tuffaceous sandstone. | |
| Environment: | coastal indet. |
| Geology comments: No paleoenvironmental data reported. | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | surface (in situ),field collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | USNM |
| Taxonomic list comments:Exhaustive for gastropoda and bivalvia. | |
Metadata
| Database number: | 93043 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2009-12-24 12:44:38 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | the public | Released: | 2009-12-24 12:44:38 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 13235. | W. P. Woodring. 1973. Geology and paleontology of canal zone and adjoing parts of Panama: Description of Tertiary mollusks (additions to gastropods, scaphopods, pelecypods: Nuculidae to Malleidae). United States Geological Survey Professional Paper 306(E):453-539 [A. Miller/A. Hendy/A. Hendy] |
Secondary references:
| 13359 | W. P. Woodring. 1982. Geology and paleontology of canal zone and adjoing parts of Panama: Description of Tertiary mollusks (Pelecypods: Propeamussiidae to Cuspidariidae). United States Geological Survey Professional Paper 306(F) [A. Miller/A. Hendy/A. Hendy] |