Zone C - Jama Formation: Pliocene, Ecuador

List of taxa
Where & when
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Ostreida - Ostreidae
Ostrea megodon Hanley 1846
recombined as Undulostrea megodon
Bivalvia - Pectinida - Pectinidae
Pecten ventricosus Sowerby 1842
recombined as Argopecten ventricosus
Bivalvia - Cardiida - Veneridae
Anomalocardia callistoides n. sp. Pilsbry and Olsson 1941
recombined as Iliochione callistoides
see common names

Country:Ecuador State/province:Manabi
Coordinates: 0.2° North, 80.3° West (view map)
Paleocoordinates:0.0° South, 79.5° West
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Period:Neogene Epoch:Pliocene
10 m.y. bin:Cenozoic 6
Key time interval:Pliocene
Age range of interval:5.33300 - 2.58000 m.y. ago
Local section:Puerto Jama Local bed:48 ft
Local order:bottom to top
Stratigraphic resolution:group of beds
Stratigraphy comments: Rests upon Miocene strata with a marked unconformity. Thickness of zone is approximately 15 ft, total thickness of section is over 265 ft. Collection is from Zone C.
Lithology and environment
Primary lithology:concretionary,blue poorly lithified sandstone
Includes fossils?Y
Lithology description: Bluish sands, somewhat lignitic in the upper part, nodular in the lower.
Geology comments: The lower part of this zone comprises mainly deeper water [offshore?] forms.
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:selective quarrying,field collection
Reason for describing collection:taxonomic analysis
Collection method comments: Probably collected by current authors, though text also makes referal to faunal lists by Sheppard (1930) and a collecton of Barker.
Taxonomic list comments:Exhaustive for Mollusca; nomenclature probably outdated though accurate.
Database number:51887
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:A. Hendy Research group:marine invertebrate
Created:2005-06-29 11:16:16 Last modified:2013-11-25 13:37:23
Access level:group members Released:2006-06-29 11:16:16
Creative Commons license:CC BY
Reference information

Primary reference:

13814. H. A. Pilsbry and A.A. Olsson. 1941. A Pliocene fauna from Western Ecuador. Proceedings of the Natural Sciences of Philadelphia 93:1-79 [A. Miller/A. Hendy/A. Hendy]