Loc. 77. near water below falls at the high bridge, Ausable Chasm, Keesville (Cambrian of the United States)

Where: Clinton County, New York (44.5° N, 73.5° W: paleocoordinates 31.7° S, 73.4° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Keeseville Formation (Potsdam Group), Trempealeauan (492.5 - 485.4 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; sandstone

Size class: macrofossils

Reposited in the USNM

Primary reference: C. D. Walcott. 1912. Cambrian geology and paleontology. II. New York Potsdam Hoyt fauna. Smithsonian Miscellaneous Collections 57(9):263-289 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 74542: authorized by Pete Wagner, entered by Pete Wagner on 11.08.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Hyolitha
 Hyolithida - Hyolithidae
Hyolithes gibbosus Hall and Whitfield 1872
Lingulata
 Lingulida - Obolidae
Lingulella prima Billings 1856
Trilobita
 Ptychopariida - Ptychopariidae
Palaeacmaea typica
  -
Palaeacmaea typica Hall and Whitfield 1872