Lo Valdes locality, Lo Valdés Fm, upper Siltstone Mmb (Jurassic to of Chile)

Where: Chile (33.8° S, 70.0° W: paleocoordinates 32.4° S, 33.4° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Substeueroceras koeneni ammonoid zone, Siltstone Member (Lo Valdés Formation), Late/Upper Tithonian to Late/Upper Tithonian (150.8 - 140.2 Ma)

• early? Tithonian to Hauterivian

• member-level stratigraphic resolution

Environment/lithology: offshore shelf; calcareous siltstone

• 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 siltstone

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 151672: authorized by Wolfgang Kiessling, entered by Mihaela Krause on 10.10.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Ammonitida - Olcostephanidae
Groebericeras rocardi, Spiticeras acutum, Spiticeras tripartitum, "Spiticeras spitiense" = Spiticeras (Spiticeras) spitiensis
Groebericeras rocardi Pomel 1889 ammonite
Spiticeras tripartitum Hupé 1854 ammonite
"Spiticeras spitiense" = Spiticeras (Spiticeras) spitiensis Blanford 1863 ammonite
 Ammonitida - Neocomitidae
Berriasella jacobi, Malbosiceras malbosi, Frenguelliceras magister
Berriasella jacobi Mazenot 1939 ammonite
Malbosiceras malbosi Pictet 1867 ammonite