Lo Valdes locality, Lo Valdés Fm, lower part of Sandstone Mmb (Jurassic of Chile)

Where: Chile (33.8° S, 70.0° W)

• Paleocoordinates: 38.1° S, 28.7° W (Wright 2013)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Micracanthoceras microcanthum - Corongoceras alternans ammonoid zone, Sandstone Member (Lo Valdés Formation), Late/Upper Tithonian (145.1 - 143.1 Ma)

• early? Tithonian to Hauterivian

• bed-level stratigraphic resolution

Environment/lithology: offshore shelf; calcareous sandstone

• 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).
• calcareous sandstone

Size classes: macrofossils, mesofossils

Primary reference: 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]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 151661: authorized by Wolfgang Kiessling, entered by Mihaela Krause on 09.10.2013

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Ammonitida - Himalayitidae
Corongoceras involutum, Corongoceras mendozanum, Corongoceras evolutum, Corongoceras lotenoense
Corongoceras mendozanum Behrendsen 1892 ammonite
Corongoceras evolutum Corvalán 1959 ammonite
Corongoceras lotenoense Spath 1925 ammonite