M-9, Cerro Buque [Pisco Fm]: Middle Miocene, Peru

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Chondrichthyes - Carcharhiniformes - Carcharhinidae
Galeocerdo cf. contortus Gibbes 1847
recombined as Physogaleus contortus
see common names

Geography
Country:Peru
Coordinates: 14.6° South, 75.7° West (view map)
Paleocoordinates:15.2° South, 72.4° West
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period:Neogene Epoch:Miocene
10 m.y. bin:Cenozoic 5
Key time interval:Middle Miocene
Age range of interval:15.97000 - 11.60800 m.y. ago
Stratigraphy
Formation:Pisco
Local section:Cerro Buque Local bed:6 m
Local order:bottom to top
Stratigraphic resolution:bed
Stratigraphy comments: STRATIGRAPHIC RELATIONS: From the Pisco Fm, which regionally, unconformably overlies the Chilcatay Fm (late Oligocene-early Middle Miocene). AGE: early Middle Miocene to Late Pliocene on the basis of K/Ar dates, siliceous microfossil zonation, and molluscan biostratigraphy supports. Stated in text to be of Middle Miocene age. STRATIGRAPHIC POSITION: From top of section.
Lithology and environment
Primary lithology: sandy siltstone
Includes fossils?Y
Lithology description: SPECIFIC LITHOLOGY: Sandstone. LITHIFICATION: Not stated in text.
Environment:coastal indet.
Geology comments: ENVIRONMENT: Not discussed in text, but appears to be from relatively shallow marine siliciclastic setting.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:paleoecologic analysis
Collection method comments: COLLECTOR: Not stated in text. REPOSITORY: Unknown.
Taxonomic list comments:COVERAGE: Focused on chondrichthyans, but including bivalves and gastropods. NOMENCLATURE: Not an authoritative publication, but with modern nomenclature, and species-resolution taxonomic assignments.
Metadata
Database number:113244
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:A. Hendy Research group:marine invertebrate
Created:2011-07-24 05:18:11 Last modified:2013-11-25 13:37:23
Access level:the public Released:2011-07-24 05:18:11
Creative Commons license:CC BY
Reference information

Primary reference:

36761. A. Alván, J. Apolín, and C. Chacaltana. 2004. Los dientes de Seláceos (Condrichthyies) y su aplicaión estratigráfica en Las Lomas de Ullujaya (Ica, Perú). XIII Congreso Peruano de Geología. Resúmenes Extendidos 595-598 [A. Hendy/A. Hendy/A. Hendy]