Lo Valdés Formation, Rio Volcán, Santiago Province, Units I-III (Jurassic of Chile)

Where: Chile (33.8° S, 70.1° W: paleocoordinates 32.0° S, 33.3° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Units I-III Member (Lo Valdés Formation), Tithonian (152.1 - 145.0 Ma)

• Unit I: 625 m.

•Unit II: 130 m.

•Unit III: 65 m.

• group of beds-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithified, shelly/skeletal grainstone and lithified, sandy limestone

• shallow-water facies; shallow back-arc basin
• Sequence mainly composed of biosparite limestone and sandy limestone.

Size class: macrofossils

Primary reference: A. Hallam, L. Biró-Bagóczky, and E. Perez. 1986. Facies analysis of the Lo Valdés Formation (Tithonian-Hauterivian) of the High Cordillera of Central Chile, and the palaeogeographic evolution of the Andean Basin. Geological Magazine 123(4):425-435 [M. Aberhan/S. Nurnberg/S. Nurnberg]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 57144: authorized by Martin Aberhan, entered by Sabine Nürnberg on 06.12.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Nuculanida - Nuculanidae
Nuculana sp. Link 1807 pointed nut clam
 Mytilida - Mytilidae
Modiolus sp. Lamarck 1801 mussel
 Arcida - Cucullaeidae
 Ostreida - Ostreidae
 Ostreida - Gryphaeidae
 Pectinida - Limidae
Plagiostoma sp. Sowerby 1814 file clam
 Myalinida - Inoceramidae
Inoceramus sp. Sowerby 1814 clam
 Trigoniida - Megatrigonioidae
 Trigoniida - Myophorelloidae
Steinmanella transitoria Steinmann 1881 clam
 Trigoniida - Trigoniidae
 Lucinida - Lucinidae
 Hiatellida - Hiatellidae
"Panopaea dupinian" = Panopea
"Panopaea dupinian" = Panopea clam
 Pholadomyida - Pholadomyidae
Pholadomya gigantea Sowerby 1836 clam
 Carditida - Astartidae
Eriphyla argentina Burckh and Weaver 1907 clam