AMNH302, Bed 25, Cerro Yananyare Section 10, Tarma (Permian to of Peru)

Where: Junin, Peru (11.4° S, 75.7° W: paleocoordinates 21.9° S, 47.2° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Mitu Group, Artinskian to Artinskian (290.1 - 272.3 Ma)

• Age of Mitu Group is not well-constrained, overlies Asselian-early Artinskian Copacabana Group unconformably. Bed is 108 feet thick

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, pebbly shale and lithified limestone

• Shale, dark red, with a few thin layers of unconsolidated gravel. Calcareous beds contain poorly preserved fossils.

Size class: macrofossils

Preservation: replaced with silica

Collection methods: bulk, chemical,

Primary reference: N. D. Newell, J. Chronic, and T.G. Roberts. 1953. Upper Paleozoic of Peru. Geological Society of America Memoir 58:1-276 [D. Bottjer/M. Clapham/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 41386: authorized by David Bottjer, entered by Matthew Clapham on 13.07.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Strophomenata
 Productida - Productidae
"Marginifera capaci" = Kozlowskia capaci
"Marginifera capaci" = Kozlowskia capaci d'Orbigny 1842
Rhynchonellata
 Spiriferida - Ambocoeliidae