Lo Vales locality, Lo Valdés Fm, Sandstone Mmb: Late Tithonian, Chile

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Cephalopoda - Ammonitida - Neocomitidae
Lytohoplites paredesi n. sp.
Lytohoplites zambranoi n. sp.
Lytohoplites varelae n. sp.
Lytohoplites rauloi n. sp.
Cephalopoda - Ammonitida - Himalayitidae
Micracanthoceras spinulosum (Gerth 1925)
Micracanthoceras microcanthum (Oppel 1865)
see common names

Geography
Country:Chile
Coordinates: 33.8° South, 70.0° West (view map)
Paleocoordinates:32.3° South, 33.3° West
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period: Jurassic Epoch: Late Jurassic
Stage: Tithonian 10 m.y. bin: Jurassic 6
Key time interval: Late Tithonian Ammonoid zone:  Micracanthoceras microcanthum - Corongoceras alternans
Age range of interval: 146.3 - 145 m.y. ago
Stratigraphy
Formation:Lo Valdés Member:Sandstone
Stratigraphy comments: early? Tithonian to Hauterivian
Lithology and environment
Primary lithology: calcareous sandstone
Lithology description: calcareous sandstone
Environment:offshore shelf
Geology comments: Lo Valdés Formation consists of a 750 m thick sequence of limestone, calcareous siltstone and calcareous sandstones, conglomerates and breccias as well as >600 m of andesite in the lower part of the section. Biro (1964) divided the formation in three members which are predominantly volcanic (silite member, at base unit), siliciclastic (sandstone member, middle part of unit) and calcareous (calcareous member, at top of unit).
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils,mesofossils
Collection methods and comments
Reason for describing collection:paleoecologic analysis
Metadata
Database number:151662
Authorizer:W. Kiessling Enterer:M. Krause
Modifier:P. Wagner Research group:marine invertebrate
Created:2013-10-09 23:31:24 Last modified:2024-10-28 22:20:00
Access level:the public Released:2013-10-09 23:31:24
Creative Commons license:CC BY
Reference information

Primary reference:
48469. C. A. Salazar Soto. 2012. The Jurassic-Cretaceous Boundary (Tithonian - Hauterivian) in the Andean Basin of Central Chile: Ammonites, Bio- and Sequence Stratigraphy and Palaeobiogeography. [W. Kiessling/M. Krause]