Daule Formation (Miocene of Ecuador)

Where: Guayas, Ecuador (1.7° S, 80.3° W: paleocoordinates 2.5° S, 77.3° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Daule Formation, Middle Miocene (16.0 - 11.6 Ma)

• LITHOSTRATIGRAPHY: From Daule Fm, for which lithostratigraphic relationships are not discussed. The Daule Fm has affinities to the Progreso Fm, and Middle Miocene formations of Peru. Taxa are share with the Gatun fm, the Tubera Fm, the Cucurrupi Fm of Colombia. AGE: Middle Miocene on the basis of macrofossil biostratigraphy. STRATIGRAPHIC POSITION: Composite list for formation.

• formation-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; lithified, calcareous sandstone

• Shallow to moderately deep-water siliciclastic environment, with normal salinity conditions, although some brackish water taxa are present. Probably upper neritic zone, a few km from the shoreline, deposited during transgressive onlap.
• LITHOLOGY: Mainly calcareous indurated sandstone. LITHIFICATION: Lithified, on the basis of facies description.

Size class: macrofossils

Collection methods: COLLECTORS: Unknown. REPOSITORY: Unknown.

Primary reference: W. P. Woodring. 1957. Geology and Paleontology of Canal Zone and adjoining parts of Panama. United States Geological Survey Professional Paper 306(A) [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 96509: authorized by Austin Hendy, entered by Austin Hendy on 10.06.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Limited to taxa miscellaneously mentioned in text. NOMENCLATURE: Authoritative publication, with modern nomenclature, and species-resolution identifications.
Bivalvia
 Arcida - Noetiidae
"Noetia (Noetia) reversa" = Noetia reversa5
"Noetia (Noetia) reversa" = Noetia reversa5 Sowerby 1833 clam
SUBSPECIES: Noetia (Noetia) reversa macdonaldi
 Cardiida - Veneridae
"Agriopoma (Pitarella) gatunensis" = Callocardia (Agriopoma) gatunensis6, Chione (Chionopsis) propinqua6
"Agriopoma (Pitarella) gatunensis" = Callocardia (Agriopoma) gatunensis6 Dall 1903 venus clam
Chione (Chionopsis) propinqua6 Spieker 1922 venus clam
Gastropoda
 Heterostropha - Architectonicidae
"Architectonica (Architectonica) nobilis" = Architectonica nobilis
"Architectonica (Architectonica) nobilis" = Architectonica nobilis Röding 1798 sundial
SUBSPECIES: Architectonica (Architectonica) nobilis karsteni
 Cerithioidea - Potamididae
Potamides suprasulcatus Gabb 1873 horn snail
 Sorbeoconcha - Naticidae
Stigmaulax guppiana2 Toula 1909 moon snail
 Neogastropoda - Columbellidae
 Neogastropoda - Buccinidae
 Neogastropoda - Terebridae
Terebra (Panaterebra) cucurrupiensis4 Oinomikado 1939 auger snail