Los Espejos Formation, Facies C, beds 17 and 21, Cerro del Fuerte section (Silurian of Argentina)

Where: Argentina (30.3° S, 68.8° W: paleocoordinates 48.3° S, 126.5° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Los Espejos Formation, Pridoli (423.0 - 419.2 Ma)

• member-level stratigraphic resolution

Environment/lithology: marine; green sandstone

• "...deposited mainly as bed load...Large-scale crossbedding reflects lower regime hydrodynamics of sand dunes or megaripples...Beds may represent high-energy deposits formed by effects of storms in nearshore zone...Shell concentrations seem to be lag deposits..."
• "Fine to medium-grained, massive or crossbedded, light-green sandstone beds 5 to 8 meters thick...Internally beds homogeneous...diffuse cross-stratification detectable where bedding surfaces contain shell concentrations. Near the top, parallel or low-angle lamination common...Shell lenses 5 to 30 cm thick."

Collection methods: Coquinas 17 and 21 in Table 2.

Primary reference: T. M. Sanchez, B. G. Waisfeld, and J. L. Benedetto. 1991. Lithofacies, taphonomy, and brachiopod assemblages in the Silurian of western Argentina: A review of Malvinokaffric Realm communities. Journal of South American Earth Sciences 4(4):307-329 [M. Foote/M. Foote/O. Alfaro]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 25057: authorized by Michael Foote, entered by Michael Foote on 27.08.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Bivalvia
 Nuculanida - Malletiidae
? Palaeoneilo sp.
? Palaeoneilo sp. Hall and Whitfield 1869 clam
Gastropoda
 Murchisoniina - Loxonematidae
Loxonema sp.
Loxonema sp. Phillips 1841 snail
 Bellerophontida -
"Bellerophontacea indet." = Bellerophontoidea
"Bellerophontacea indet." = Bellerophontoidea M'Coy 1851 snail
 Lophophorata -
Tentaculitida indet.
Tentaculitida indet. Ljaschenko 1955
Rhynchonellata
 Rhynchonellida - Leptocoeliidae
"Harringtonina acutiplicata" = Anabaia
"Harringtonina acutiplicata" = Anabaia
 Rhynchonellida - Eatoniidae
Clarkeia antisiensis
 Athyridida - Anoplothecidae
Coelospira extensa
Strophomenata
 Strophomenida -
Amosina sp.
 Strophomenida - Leptostrophiidae
Castellaroina fascifer
Trilobita
 Phacopida - Phacopidae
Phacops argentinus
 Phacopida - Homalonotidae
Trimerus kayseri