Esmeraldas Formation: Zanclean, Ecuador

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Gastropoda - Neotaenioglossa - Calyptraeidae
Woodring 1973
Gastropoda - Neogastropoda - Cancellariidae
Woodring 1970
Massyla terryi (Olsson 1942)
Landau et al. 2012
Gastropoda - Neogastropoda - Turridae
Woodring 1970
Gastropoda - Neogastropoda - Cochlespiridae
Woodring 1970
Gastropoda - Neogastropoda - Muricidae
Vokes 1998
Gastropoda - Cassidae
Dalium sp. Dall 1889
Bivalvia - Arcida - Limopsidae
Limopsis sp. Sassi 1827
Bivalvia - Lucinida - Lucinidae
Lucinoma chiripanica (Olsson 1942)
Woodring 1982
unclassified
Bryozoa indet. Ehrenberg 1831
Thecostraca
Cirripedia indet. Rafinesque 1816
unclassified
Scaphopoda - Dentaliida - Dentaliidae
Woodring 1973
Asteroidea
Echinoidea
Anthozoa - Scleractinia - Flabellidae
Flabellum sp. Lesson 1831
unclassified
Chondrites sp. von Sternberg 1833
Zoophycos (Spirophyton) sp. (Massalongo 1855)
see common names

Geography
Country:Ecuador
Coordinates: 1.0° North, 79.8° West (view map)
Paleocoordinates:1.3° North, 78.7° West (Wright 2013)
Basis of coordinate:based on nearby landmark
Geographic resolution:basin
Time
Period: Neogene Epoch: Pliocene
Stage: Zanclean 10 m.y. bin: Cenozoic 6
Key time interval: Zanclean
Age range of interval: 5.333 - 3.6 m.y. ago
Stratigraphy
Formation:Esmeraldas
Stratigraphic resolution:formation
Stratigraphy comments: STRATIGRAPHIC RELATIONS: From the Esmeraldas Fm, which regionally overlies the Borbon Fm (Middle-Late Miocene). AGE: Zanclean, on the basis of microfossil biostratigraphy. STRATIGRAPHIC POSITION: Collection is representative for entire formation.
Lithology and environment
Primary lithology:bioturbation,tuffaceous,green unlithified mudstone
Includes fossils?Y
Lithology description: SPECIFIC LITHOLOGY: Greenish tuffaceous mudstone, containing interbeds of white volcanic ash, graded sand, and in some places graded shell debris. LITHIFICATION: Unlithified, as stated in text.
Environment:deep-water indet.
Geology comments: ENVIRONMENT: Microplanktonic fauna is fairly diverse, which sug- gests water depths in excess of 200 m. The benthonic fora- minifera suggest depths in the 240 to 900-m range. The mol- luscan fauna contains many discrepancies, in the combined presence of shoal-water and deep-water forms. Olsson (1964), strongly influenced by the presence of the "unusual" deep- water species, estimated the depth at 200 fathoms or 365 m. Rosenberg (1981) plotted a histogram of depth distributions, which peaked at 64 m.
Taphonomy
Modes of preservation:body,trace
Size of fossils:macrofossils
Collection methods and comments
Collection excludes:some macrofossils
Reason for describing collection:biostratigraphic analysis
Collection method comments: COLLECTOR: Multiple workers. REPOSITORY: Multiple repositories, not stated.
Taxonomic list comments:COVERAGE: Limited to charactersitic or unusual macrofossils and ichnofossils. NOMENCLATURE: Not an authoritative publication, and with genus-resolution identifications.
Metadata
Database number:90857
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:A. Hendy Research group:marine invertebrate,micropaleontology
Created:2009-08-19 17:55:09 Last modified:2025-02-22 15:12:02
Access level:the public Released:2009-08-19 17:55:09
Creative Commons license:CC0
Reference information

Primary reference:
30557. P. F. Hasson and A. G. Fischer. 1986. Observations on the Neogene of Northwestern Ecuador. Micropaleontology 32(1):32-42 [A. Hendy/A. Hendy]

Secondary references:

43491 B. Landau, R. E. Petit, and C. M. Silva. 2012. New Cancellariidae (Mollusca, Gastropoda) from the Miocene Gatun Formation of Panama, with eleven new species. Journal of Paleontology 86(6):907-930 [A. Hendy/A. Hendy]
18707 E. H. Vokes. 1998. Neogene Paleontology in the Northern Dominican Republic 18. The Superfamily Volutacea (in part) (Mollusca: Gastropoda). Bulletins of American Paleontology 113(354):1-54 [A. Hendy/A. Hendy]
13236 W. P. Woodring. 1970. Geology and paleontology of canal zone and adjoing parts of Panama: Description of Tertiary mollusks (gastropods: Eulimidae, Marginellidae to Helminthoglyptidae). United States Geological Survey Professional Paper 306(D):299-452 [A. Miller/A. Hendy/A. Hendy]
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]
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]