Marks (1951) IPC# 1464 (Blue Siltstone Mbr, Daule Fm): Middle Miocene, Ecuador

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Cardiida - Veneridae
Clementia dariena (Conrad 1855)
Bivalvia - Carditida - Crassatellidae
Eucrassatella berryi (Spieker 1922)
Gastropoda - Cypraeidae
Cypraea sp. Linnaeus 1758
Cypraea cf. henekeni (Sowerby 1850)
    = Muracypraea woodringi Landau and Groves 2011
Landau and Groves 2011
Gastropoda - Neogastropoda - Cancellariidae
Cancellaria casicalva Marks 1949
Gastropoda - Neogastropoda - Buccinidae
Cantharus predistortus Marks 1951
Phos haughti Marks 1951
Hanetia sp. Jousseaume 1880
Gastropoda - Neogastropoda - Columbellidae
Strombina striatocostata Marks 1951
Gastropoda - Neogastropoda - Conidae
Conus sophus (Olsson 1932)
Conus bravoi (Spieker 1922)
Conus multiliratus (Olsson 1922)
Gastropoda - Neogastropoda - Clavatulidae
Turricula sp. Schumacher 1817
Gastropoda - Naticidae
Natica guppyana (Toula 1909)
Gastropoda - Heterostropha - Architectonicidae
Architectonica haughti
Architectonica nobilis Röding 1798
see common names

Geography
Country:Ecuador State/province:Guayas
Coordinates: 1.7° South, 80.3° West (view map)
Paleocoordinates:2.5° South, 77.3° West
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period: Neogene Epoch: Miocene
10 m.y. bin: Cenozoic 5
Key time interval: Middle Miocene
Age range of interval: 15.98 - 11.63 m.y. ago
Stratigraphy
Formation:Daule Member:Blue Siltstone
Local section:Jerusalem
Regional section:Daule
Stratigraphic resolution:bed
Stratigraphy comments: From Daule Fm, which is of Middle Miocene age comprises three members, a "basal calcareous" member, a middle "blue siltstone" member, and an "upper calcareous" member. The exact thickness of the unit has not been measured accurately in this section because of structural complications. The blue siltstone, from which this collecion is derived is about 800 ft thick. Faunal compositions suggests a Middle Miocene age, with 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.
Lithology and environment
Primary lithology:blue poorly lithified siltstone
Includes fossils?Y
Lithology description: Recessive blue siltstone
Environment:offshore
Geology comments: Deposition at slightly greater depth, quiet conditions, several kilometers from shore, siliciclastic environment, with normal salinity conditions, during relative highstand.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection excludes:all microfossils
Collection methods:selective quarrying,field collection
Reason for describing collection:biostratigraphic analysis
Museum repositories:PRI
Collection method comments: Fossil material derived from the International Ecuadorian Petroleum Company (subsidiary of Standard Oil Co.) and was collected by the author (then employed by oil company) during field exploration and drilling operations. All type and voucher material reposited in PRI collections.
Taxonomic list comments:Exhaustive for gastropoda and bivalvia.
Metadata
Database number:61086
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:A. Hendy Research group:marine invertebrate
Created:2006-05-29 16:01:15 Last modified:2013-11-25 13:37:23
Access level:the public Released:2006-05-29 16:01:15
Creative Commons license:CC BY
Reference information

Primary reference:
17441. J. G. Marks. 1951. Miocene stratigraphy and paleontology of Southwestern Ecuador. Bulletins of American Paleontology 33(139):1-448 [A. Miller/A. Hendy]

Secondary references:

43452 B. M. Landau and L. T. Groves. 2011. Cypraeidae (Mollusca: Gastropoda) from the early Miocene Cantaure Formation of northern Venezuela. Novaplex 12(1-2):1-38 [A. Hendy/A. Hendy]