M-8a, Cerro Buque [Chilcatay Fm]: Burdigalian, Peru

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Chondrichthyes - Lamniformes - Lamnidae
Isurus desori Sismonda 1849
Carcharocles chubutensis (Agassiz 1839)
recombined as Carcharodon subauriculatus
see common names

Geography
Country:Peru
Coordinates: 14.6° South, 75.7° West (view map)
Paleocoordinates:15.5° South, 71.5° West
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
Period:Neogene Epoch:Miocene
Stage:Burdigalian 10 m.y. bin:Cenozoic 5
Key time interval:Burdigalian
Age range of interval:20.44000 - 15.97000 m.y. ago
Stratigraphy
Formation:Chilcatay
Local section:Cerro Buque column 1 Local bed:12 m
Local order:bottom to top
Stratigraphic resolution:bed
Stratigraphy comments: Originally Early Miocene
STRATIGRAPHIC RELATIONS: From the Chilcatay Fm, which regionally, is unconformably overlain by the Pisco Fm (Middle Miocene). AGE: late Oligocene to early Miocene on the basis of K/Ar dates, siliceous microfossil zonation, and molluscan biostratigraphy supports. Stated in text to be of Early Miocene age. STRATIGRAPHIC POSITION: From middle of section.
Lithology and environment
Primary lithology: silty sandstone
Includes fossils?Y
Lithology description: SPECIFIC LITHOLOGY: Silty 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:113249
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:M. Uhen Research group:marine invertebrate
Created:2011-07-24 05:25:30 Last modified:2020-07-22 15:54:19
Access level:the public Released:2011-07-24 05:25:30
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]

Secondary references:

73128 G. Bosio, E. Malinverno, A. Collareta, C. Di Celma, A. Gioncada, M. Parente, F. Berra, F. G. Marxf, A. Vertino, M. Urbina, and G. Bianucci. 2020. Strontium Isotope Stratigraphy and the thermophilic fossil fauna from the middle Miocene of the East Pisco Basin (Peru). Journal of South American Earth Sciences 97 [M. Uhen/M. Uhen]