Split Rock - Olney (Devonian of the United States)

Where: Onondaga County, New York (43.0° N, 76.2° W)

• Paleocoordinates: 30.4° S, 49.8° W (Wright 2013)

• coordinate estimated from map

• small collection-level geographic resolution

When: Olney Member (Manlius Formation), Lochkovian (419.2 - 410.8 Ma)

• Ebert and Matteson (2023) place the Olney member in the middle of the Manlius, just above the Pridoli-Lochkovian boundary

• member-level stratigraphic resolution

Environment/lithology: peritidal; lithified, peloidal, blue lime mudstone

• Ebert and Matteson 2003: "the dolomitic strata of the Olney Member represent deposition on tidal flats"
• Approximately 30 feet of even-bedded,fine-grained, pelletal, carbonate mudstones are assigned to the Olney Member . . .0lney is predominantly a dark-blue micrite which weathers rapidly to a light gray-blue. However, certain exposures frequently have a banded appearance due to the presence of thin alternating blue and drat, layers

Size classes: macrofossils, mesofossils

Primary reference: R. Belak. 1977. Ontogeny of the Devonian Leperditiid Ostracode Herrmannina alta. Journal of Paleontology 51(5):943-952 [L. Ivany/P. Wall]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 75184: authorized by Linda Ivany, entered by Patrick Wall on 25.09.2007

Creative Commons license: CC0 (CC0)

Taxonomic list

Cyanophyceae
  - Garwoodiaceae
Garwoodia gregaria Nicholson 1941
Stromatoporoidea
 Syringostromatida - Coenostromatidae
"Syringostroma barretti" = Parallelostroma microporum
"Syringostroma barretti" = Parallelostroma microporum Girty 1895 stromatoporoid sponge
Anthozoa
  -
Anthozoa indet. Ehrenberg 1834
Sedentaria
 Sabellida - Serpulidae
Rhynchonellata
 Spiriferida - Delthyrididae
Strophomenata
 Strophomenida - Amphistrophiidae
Lophophorata
 Tentaculitida - Tentaculitidae
Gastropoda
 Murchisoniina - Murchisoniidae
"Murchisonia extenuata" = Goniostropha extenuata
"Murchisonia extenuata" = Goniostropha extenuata Hall 1859 snail
Cephalopoda
 Nautiloidea -
Nautiloidea indet. Agassiz 1847 nautiloid
Bivalvia
 Ostreida - Pterineidae
Actinopteria sp. Hall 1884 oyster
Euchelicerata
 Eurypterida - Erieopteridae
Ostracoda
 Leperditicopida - Leperditiidae
Crinoidea
 Dendrocrinida - Mastigocrinidae