PPP# 485 - Cativa [lower Gatun Fm]: Tortonian, Panama

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Mytilida - Mytilidae
? Septifer sp. Récluz 1848
6 specimens
Bivalvia - Ostreida - Ostreidae
Ostreola sp. Monterosato 1884
27 specimens
Bivalvia - Pectinida - Pectinidae
Amusium sp. (Röding 1798)
7 specimens
Aequipecten sp. Fischer 1886
8 specimens
Bivalvia - Arcida - Arcidae
Anadara (Rasia) sp. (Gray 1857)
2 specimens
Bivalvia - Pholadida - Teredinidae
Teredo sp. Linnaeus 1758
73 specimens
Bivalvia - Cardiida - Tellinidae
Psammacoma (Psammacoma) sp. Dall 1900
3 specimens
Bivalvia - Cardiida - Veneridae
Clementia sp. Gray 1847
4 specimens
Dosinia sp. Scopoli 1777
16 specimens
Gastropoda - Neogastropoda - Olividae
Oliva (Oliva) sp. Bruguière 1789
6 specimens
Gastropoda - Turritellidae
Turritella sp. Lamarck 1799
22 specimens
see common names

Geography
Country:Panama State/province:Colon
Coordinates: 9.4° North, 79.9° West (view map)
Paleocoordinates:9.1° North, 78.5° West
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period: Neogene Epoch: Miocene
Stage: Tortonian 10 m.y. bin: Cenozoic 6
Key time interval: Tortonian
Age range of interval: 11.63 - 7.246 m.y. ago
Age estimate: 10.9 Ma (other)
Stratigraphy
Formation:Gatun Member:lower Gatun
Stratigraphic resolution:bed
Stratigraphy comments: STRATIGRAPHIC RELATIONS: The Gatun Fm rests unconformably on formations of different ages in different parts of the Panama Canal Basin. To the east of Colon, the Gatun Fm rests nonconformably on unamed Cretaceous volcanics. To the west of Colon, including several islands in Lake Gatun, the Gatun Fm rests with angular unconformity on the upper Oligocene Caimito Fm. BIOSTRATIGRAPHY: The Middle Gatun Fm is early Late Miocene (8.8-8.3 MA) according to Collins et al. (1999). Local section name: Sabanita to Payardi. AGE: Tortonian based on more recent dating (Hendy, 2012). Sr dating for nearby sections indicates an age of approximately 11.3 Ma (Hendy, unpublished data).
Lithology and environment
Primary lithology:bioturbation unlithified siltstone
Secondary lithology:bioturbation unlithified siltstone
Includes fossils?Y
Includes fossils?Y
Lithology description: GENERAL LITHOLOGY: From Collins et al. (1999), the Middle Gatun Fm consists of alternating siltstone and sandstone with occasional 4-5 m units of interbedded sandstone and conglomerate. Pervasive bioturbation is extensive. LITHIFICATION: lithification data not reported, but assumed to be unlithified based on observation of specimens in Woodring (1957-1982).
Environment:coastal indet.
Geology comments: ENVIRONMENT: from Collins et al. (1999), open, inner neritic.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection excludes:all microfossils,some macrofossils
Collection methods:bulk,sieve,field collection
Reason for describing collection:paleoecologic analysis
Museum repositories:NMB
Collection method comments: COLLECTORS: unknown (PPP staff) collected on 6/12/88. REPOSITORIES: Naturhistorisches Museum Basel (NMB),
Taxonomic list comments:COVERAGE: Exhaustive for gastropoda, bivalvia and scaphopoda. NOMENCLATURE: modern nomenclature, though only identified to subgenus resolution.
Metadata
Also known as:NMB Loc. 17866
Database number:79987
Authorizer:A. Hendy Enterer:K. Bulinski
Modifier:A. Hendy Research group:marine invertebrate
Created:2008-03-31 18:50:59 Last modified:2013-11-25 13:37:23
Access level:authorizer only Released:2009-03-31 18:50:59
Creative Commons license:CC BY
Reference information

Primary reference:
17667. L. S. Collins and A. G. Coates. 1999. A paleobiotic survey of Caribbean faunas from the Neogene of the Isthmus of Panama. Bulletins of American Paleontology (357) [A. Miller/A. Hendy/A. Hendy]