Cerro Cumillango, patch reef at the base of the San Juan Formation, San Juan ( of Argentina)

Where: Argentina (30.5° S, 68.8° W: paleocoordinates 38.4° S, 128.6° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: San Juan Formation, Tremadoc (486.5 - 477.7 Ma)

• Bed 1a (base of the San Juan Formation); P. deltifer conodont zone; Late Tremadoc

• bed-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified reef rocks

• patch reef
• Girvanella-rich calcimicrobial biolithites, lithistid sponges and Calathium

Size class: macrofossils

Preservation: replaced with silica

Primary reference: J. L. Benedetto, N. Cech, and C. Esbry. 2003. New Late Tremadoc-Early Arenig silicified brachiopods from the lower part of the San Juan Formation, Argentine Precordillera. Ameghiniana 40(4):513-530 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 66888: authorized by Wolfgang Kiessling, entered by Uta Merkel on 20.10.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Hormogoneae
 Oscillatoriales - Girvanellaceae
Girvanella sp.
Girvanella sp. Nicholson and Etheridge 1878
Rhynchonellata
 Pentamerida - Syntrophiidae
? Syntrophiidae indet.
? Syntrophiidae indet. Schuchert 1896
Radiocyatha
  - Soanitidae
Calathium sp.
Calathium sp. Billings 1865
unclassified
  -
Porifera indet.
Porifera indet. Grant 1836