Between S. Springfield & Willse 4 Corners - basal Kalkberg (Devonian of the United States)

Where: Otsego County, New York (42.9° N, 74.8° W: paleocoordinates 34.8° S, 33.8° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Kalkberg Formation (Helderberg Group), Lochkovian (419.2 - 410.8 Ma)

• basal beds

• group of beds-level stratigraphic resolution

Environment/lithology: lithified, blue, argillaceous, cherty/siliceous limestone and lithified, argillaceous, calcareous shale

• The Kalkberg is composed of thin- to medium -bedded limestones which have moderately irregular bedding planes. It is usually dark blue, finer grained than the Coeymans or Deansboro below and is very siliceous. It weathers light to dark gray and a rusty or yellowish argillaceous coating often forms on the weathered surface. By far the most characteristic eatures of the Kalkberg are the presence of black chert and the common coccurrence of calcareous and argillaceous shales interbedded with the limestones, both of which are lacking in the Coeymans. . . . it is quite fossiliferous

Primary reference: L.V. Rickard and D.H. Zenger. 1964. Stratigraphy and Paleontology of the Richfield Springs and Cooperstown Quadrangles, New York. Bulletin of the New York State Museum and Science Service 396:101 [L. Ivany/P. Wall]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 83112: authorized by Linda Ivany, entered by Patrick Wall on 07.08.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Rhynchonellata
 Spiriferida - Cyrtinopsidae
Kozlowskiellina perlamellosa
 Athyridida - Meristellidae
Meristella arcuata
 Orthida - Platyorthidae
Platyorthis planoconvexa
 Rhynchonellida - Eatoniidae
Eatonia medialis
Strophomenata
 Orthotetida - Chilidiopsidae
"Schuchertella woolworthana" = Xystostrophia woolworthana
"Schuchertella woolworthana" = Xystostrophia woolworthana Hall 1857