Horizon 6, Centerfield Member, Triphammer Falls, Genesee Valley, Livingston Co., (Devonian of the United States)

Where: Livingston County, New York (42.9° N, 77.8° W: paleocoordinates 36.7° S, 25.3° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Centerfield Member (Ludlowville Formation), Givetian (387.7 - 382.7 Ma)

• this horizon is within the lower transitional shales of the York submember of the Centerfield

• bed-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; gray, argillaceous claystone

• light gray to gray claystone

Collection methods: bulk, surface (in situ), chemical, mechanical,

Primary reference: M. Savarese, L. M. Gray, and C. E. Brett. 1986. Faunal and Lithologic Cyclicity in the Centerfield Member (Middle Devonian: Hamilton Group) of Western New York: A Reinterpretation of Depositional History. Dynamic Stratigraphy and Depositional Environments of the Hamilton Group (Middle Devonian) in New York State, Part I, New York State Museum Bulletin (457)32-56 [A. Miller/K. Layou]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 8760: authorized by Arnold Miller, entered by Karen Layou on 28.08.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

• Data is presented two ways in the paper: as presence/absence data for all 34 sampled horizons and standardized abundances for 23 of those horizons. Where available, abundance data is entered. Counts from bulk sampling "were adjusted uniformly for fragmented and single valve occurences by multiplying through a ratio--4 fragments or 2 valves equal to one occurrence". Standardization means "bulk sampling counts were standardized by sample weight".
 Phacopida - Phacopidae
Phacops sp. Emmrich 1839 trilobite
 Phacopida - Acastidae
Greenops sp. Delo 1935 trilobite
 Productida - Productellidae
 Productida - Chonetidae
 Strophomenida - Leptostrophiidae
 Strophomenida - Strophodontidae
Pholidostrophia sp. Hall and Clarke 1892
 Athyridida - Nucleospiridae
Nucleospira sp. Hall 1859
 Spiriferida - Spinocyrtiidae
 Spiriferida - Ambocoeliidae
Ambocoelia sp. Hall 1860
 Spiriferida - Mucrospiriferidae
 Atrypida - Atrypidae
Pseudatrypa sp. Copper 1973
[entered as Pseudoatrypa sp.]
 Ostreida - Pterineidae
Actinopteria sp. Hall 1884 oyster
 Carditida - Cardiniidae
Cypricardinia sp. Hall 1860 clam
 Protobranchia -
Nuculites sp. Conrad 1841 clam
Palaeoneilo sp. Hall and Whitfield 1869 clam
[entered as Paleoneilo sp.]
 Cystoporida - Sulcoreteporidae
 Auloporida - Aulocystidae
Aulocystis sp. Schl├╝ter 1885 tabulate coral