Horizon 16, 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 claystone

• light 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. In E. Landing, C. E. Brett (eds.), Dynamic Stratigraphy and Depositional Environments of the Hamilton Group (Middle Devonian) in New York State, Part I 457:32-56 [A. Miller/K. Layou/P. Wagner]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 8779: authorized by Arnold Miller, entered by Karen Layou on 29.08.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

• Data is presented in 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 valve equal to one occurence." Standardization means "bulk sampling counts were standardized by sample weight".
unclassified
  -
Anthozoa
 Stauriida - Zaphrentidae
Heliophyllum sp. Hall 1846 horn coral
 Auloporida - Aulocystidae
Aulocystis sp. Schlüter 1885 tabulate coral
 Favositida - Favositidae
Favosites sp. Lamarck 1816 tabulate coral
 Favositida - Pachyporidae
Cladopora sp. Hall 1851 tabulate coral
Trilobita
 Phacopida - Phacopidae
Phacops sp. Emmrich 1839 trilobite
Bivalvia
 Modiomorphida - Cypricardiniidae
Cypricardinia sp. Hall 1860 clam
Gastropoda
 Euomphalina - Platyceratidae
Platyceras sp. Conrad 1840 snail
Stenolaemata
 Cystoporata - Fistuliporidae
 Cryptostomata - Fenestellidae
Rhynchonellata
 Atrypida - Atrypidae
"Pseudatrypa sp." = Pseudoatrypa
"Pseudatrypa sp." = Pseudoatrypa Copper 1973
[entered as Pseudoatrypa sp.]
 Athyridida - Nucleospiridae
Nucleospira sp. Hall 1859
 Athyridida - Meristellidae
 Spiriferinida - Cyrtinidae
Cyrtina sp. Davidson 1858
 Spiriferida - Spinocyrtiidae
 Spiriferida - Elythidae
 Orthida - Rhipidomellidae
Strophomenata
 Strophomenida - Chonetidae
 Strophomenida - Strophodontidae
Pholidostrophia sp. Hall and Clarke 1892
 Strophomenida - Leptostrophiidae
 Strophomenida - Douvillinidae