Cerro Rincon (USNM 17967) (Silurian of Argentina)

Where: Salta, Argentina (24.0° S, 67.0° W: paleocoordinates 40.5° S, 131.8° W)

• outcrop-level geographic resolution

When: Salar de Rincon Formation, Llandovery (443.4 - 433.4 Ma)

• apparently the collection is from all 4 members (see below).

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, hematitic, green, yellow, argillaceous sandstone

• Member 1: 25 m unfossiliferous [they have "graptolites?" in it by the strat column] green to yellow silt/mudstone. Member 2: 12 m quartzose f.g. ss, 0.5 m beds, limonite staining. Trilobites, tentaculitids. Member 3: 18 m silt/mudstones, similar to #1, brachiopods. Member 4: 3 m med. gr. ss, hematite cement, brachs and conularids.

Primary reference: P. E. Isaacson, B. Antelo, and A. J. Boucot. 1976. Implications of a Llandovery (Early Silurian) brachiopod fauna from Salta Province, Argentina. Journal of Paleontology 50(6):1103-1112 [J. Alroy/M. Sommers/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 2866: authorized by John Alroy, entered by Mike Sommers on 21.07.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Trilobita
 Phacopida - Homalonotidae
Homalonotidae indet.
Homalonotidae indet. Chapman 1890 trilobite
homalonotid brach
Gastropoda
 Bellerophontida - Plectonotidae
Plectonotus sp.
Plectonotus sp. Clarke 1899 snail
Lophophorata
 Tentaculitida - Tentaculitidae
Tentaculitidae indet.
Tentaculitidae indet. Walcott 1886
tentaculitid
Strophomenata
 Strophomenida - Stropheodontidae
Stropheodontidae indet.
Stropheodontidae indet. Caster 1939
stropheodontid brach
 Orthotetida - Chilidiopsidae
Fardenia filistriata
Fardenia filistriata Boucot et al. 1972
Rhynchonellata
 Athyridida - Meristellidae
"Cryptothyrella cf. crassa" = Hindella crassa
"Cryptothyrella cf. crassa" = Hindella crassa Sowerby 1839
originally entered as "Cryptothyrella cf. crassa"
 Orthida - Dalmanellidae
Dalmanellidae indet.
Dalmanellidae indet. Schuchert 1913
dalmanellid brach
 Orthida - Rhipidomellidae
Mendacella sp.
Mendacella sp. Cooper 1930
Pterobranchia
 Graptoloidea - Monograptidae
Monograptidae indet.
Monograptidae indet. Lapworth 1873 graptolite
monograptid graptolites