Richfield Springs - Thacher (Devonian of the United States)

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

• coordinate estimated from map

• local area-level geographic resolution

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

• This author elevates the Thacher to a formation, but it is entered here under more standard stratigraphy

Environment/lithology: shallow subtidal; lithified, black, blue lime mudstone

• dark bluish-black fine grained limestones . . . 25 feet of dark, fine-grained limestones in beds 1 to 2 inches thick . . . "ribbon" or "Tentaculite" limetones . . . about 95% soluble in dilute HCl . . . weathers light-colored or whitish . . . loose pieces often ring or clink when struck. Cross bedding, mud-cracks, and faint ripple marks have been noted

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: general faunal/floral analysis

PaleoDB collection 76756: authorized by Linda Ivany, entered by Patrick Wall on 02.12.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

 Trepostomida - Amplexoporidae
 Syringostromatida - Coenostromatidae
"Syringostroma barretti" = Parallelostroma microporum
"Syringostroma barretti" = Parallelostroma microporum Girty 1895 stromatoporoid sponge
 Leperditicopida - Leperditiidae
 Platycopida - Kloedenellidae
 Palaeocopida - Beyrichiidae
Kloedenia spp. Jones and Holl 1886 ostracod
 Tentaculitida - Tentaculitidae
 Spiriferida - Delthyrididae
 Strophomenida - Amphistrophiidae
"Brachyprion varistriata" = Mesodouvillina varistriata
"Brachyprion varistriata" = Mesodouvillina varistriata Conrad 1842
 Euomphalina - Tychobraheidae
"Holopea antiqua" = Asinomphalus antiqua
"Holopea antiqua" = Asinomphalus antiqua Vanuxem 1842 snail
 Modiomorphida - Modiomorphidae