Where: Guayas, Ecuador (2.3° S, 80.9° W: paleocoordinates 4.2° S, 75.5° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Late/Upper Oligocene (28.4 - 23.0 Ma)
• SOURCE: assemblage collected from a single member (basal breccia). AGE: Upper Oligocene. STRAIGRAPHIC RELATIONS: the lower Oligocene at Ancon Point has been divided in six lithological units. The total thickness of the succession does not exceed 500 ft. The collection is from the "basal breccia", a sandstone averaging 35 ft thick. The breccia rests unconformably on the Eocene Seca Shale.
• member-level stratigraphic resolution
Environment/lithology: marine; lithified, conglomeratic sandstone
Size class: macrofossils
Preservation: cast, mold/impression
Reposited in the BMNH
Collection methods: quarrying, ,
• COLLECTOR: unknown collectors. REPOSITORIES: unknown repsotories
Primary reference: G. Shepard. 1937. The geology of south-western Ecuador. Published by AAPG; lists some otherwise unpublished faunal lists, identified by Woodring and Vaughan; nomenclature is antiquated. [A. Miller/A. Hendy]more details
Purpose of describing collection: general faunal/floral analysis
PaleoDB collection 61203: authorized by Austin Hendy, entered by Austin Hendy on 30.05.2006
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
Paphia sp. Röding 1798 venus clam
Meretrix cf. canoasensis venus clam
Pitar (Agriopoma) mancorensis Olsson 1931 venus clam | |
Pleurophopsis peruviana Olsson 1931 clam | |
Gastropoda | |
| |
Anconia elenensis Olsson 1931 snail | |
Nerita sp. Linnaeus 1758 snail |