Dugway Gorge Hill - Kalkberg (Devonian of the United States)

Where: Otsego County, New York (42.8° 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)

• formation-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 83111: authorized by Linda Ivany, entered by Patrick Wall on 07.08.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

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Strophomenata
 Orthotetida - Chilidiopsidae
"Schuchertella woolworthana" = Xystostrophia woolworthana
"Schuchertella woolworthana" = Xystostrophia woolworthana Hall 1857
 Strophomenida - Rafinesquinidae
Leptaena rhomboidalis
Leptaena rhomboidalis Wahlenberg 1818
Rhynchonellata
 Spiriferida - Cyrtinopsidae
Kozlowskiellina perlamellosa
 Spiriferida - Delthyrididae
Howellella cyclopterus
 Athyridida - Meristellidae
Meristella princeps, Meristella laevis, Meristella arcuata
 Orthida - Platyorthidae
Platyorthis planoconvexa
 Orthida - Dalmanellidae
Isorthis perelegans
 Rhynchonellida - Machaerariidae
"Rhynchonella ? formosa" = Machaeraria formosa
"Rhynchonella ? formosa" = Machaeraria formosa Hall 1859
 Rhynchonellida - Eatoniidae
Eatonia medalis
 Rhynchonellida - Uncinulidae
Uncinulus mutabilis
Anthozoa
 Favositida - Favositidae
Favosites sp.
Favosites sp. Lamarck 1816 tabulate coral
 Auloporida - Auloporidae
Aulopora schohariae
Aulopora schohariae tabulate coral