Shale Bank quarry, Mohonk Mountain House (Ordovician of the United States)

Where: Ulster County, New York (41.7° N, 74.2° W: paleocoordinates 28.2° S, 50.2° W)

• coordinate estimated from map

When: Martinsburg Formation, Katian (453.0 - 445.2 Ma)

Environment/lithology: offshore; graded sandstone

• "portions of the seafloor locally must have been somewhat more elevated to depths where the bottom was intermittently affected by storm-generated waves and currents. The presence of gutter casts and small-scale wave-formed ripples/hummocks in sandstones associated with the fossil assemblages described herein indicate the presence of combined flows associated with tempestites. Distinctive trace fossils (Palaeophycus, Teichichnus) in some layers indicate at least temporary presence of benthic oxygen and life activity in the sediments."
• "medium dark-gray shale interbedded with fine-grained greywacke (litharenites); the graywacke beds show graded bedding and cross laminae, some of which are parallel, and others are gently hummocky (Epstein and Lyttle, 1987)."

Size classes: macrofossils, mesofossils

Collected by J. Brower

Primary reference: J. C. Brower, C. E. Brett, and H. R. Feldman. 2024. A crinoid fauna and a new species of Pycnocrinus from the Martinsburg Formation (Upper Ordovician), lower Hudson Valley, New York. Journal of Paleontology 98(3):402-419more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 236743: authorized by Phil Novack-Gottshall, entered by Phil Novack-Gottshall on 25.10.2024

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Scyphozoa
 Conulariida - Conulariidae
Conularia sp.
Conularia sp. Miller 1820 jellyfish
Hexactinellida
  -
? Hexactinellida "glass sponge"
? Hexactinellida "glass sponge" Schmidt 1870 glass sponge
Strophomenata
 Strophomenida - Sowerbyellidae
Sowerbyella sp.
Sowerbyella sp. Jones 1928
 Strophomenida - Rafinesquinidae
Rafinesquina sp.
Rafinesquina sp. Hall and Clarke 1892
Rhynchonellata
 Orthida - Dalmanellidae
Cincinnetina sp., Dalmanella sp.
Cincinnetina sp. Jin 2012
misspelled as "Cincinetina sp."
Dalmanella sp. Hall and Clarke 1892
Bivalvia
 Nuculida - Cardiolariidae
? Deceptrix sp.
? Deceptrix sp. Fuchs 1919 clam
 Modiomorphida - Modiomorphidae
Modiolopsis sp., Pholadomorpha sp.
Modiolopsis sp. Hall 1847 clam
Pholadomorpha sp. Foerste 1914 clam
 Unioni - Lyrodesmatidae
Lyrodesma sp.
Lyrodesma sp. Conrad 1841 clam
Cephalopoda
  -
Cephalopoda "orthocones"
 Tarphycerida - Trocholitidae
Trocholites sp.
Trocholites sp. Conrad 1838
Trilobita
 Trinucleida - Trinucleidae
"Cryptolithus bellulus" = Cryptolithus tessellatus
"Cryptolithus bellulus" = Cryptolithus tessellatus Green 1832 trilobite
 Asaphida - Asaphidae
Isotelus gigas
Isotelus gigas Dekay 1824 trilobite
 Bradoriida - Beyrichonidae
? Eremos sp.
? Eremos sp. Moberg and Segerberg 1906
Crinoidea
 Monobathrida - Glyptocrinidae
Pycnocrinus mohonkensis n. sp.
Pycnocrinus mohonkensis n. sp. Brower et al. 2024 Sea lily
 Homocrinida - Cincinnaticrinidae
Cincinnaticrinus varibrachialus
Cincinnaticrinus varibrachialus Warn and Strimple 1977 Sea lily
 Homocrinida - Homocrinidae
Ectenocrinus simplex
Ectenocrinus simplex Hall 1847 Sea lily
 Inadunata - Merocrinidae
Merocrinus curtus
Merocrinus curtus Ulrich 1879 Sea lily
 Ichnofossils -
Palaeophycus sp., Teichichnus sp.
Palaeophycus sp. Hall 1847
Teichichnus sp. Seilacher 1955