Horizon 18, 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 8786: 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
 Auloporida - Aulocystidae
Aulocystis sp. Schlüter 1885 tabulate coral
 Favositida - Pachyporidae
Cladopora sp. Hall 1851 tabulate coral
 Favositida - Favositidae
Favosites sp. Lamarck 1816 tabulate coral
 Stauriida - Zaphrentidae
Heliophyllum sp. Hall 1846 horn coral
 Stauriida - Eridophyllidae
Eridophyllum sp. Milne-Edwards and Haime 1850 horn coral
Trilobita
 Phacopida - Phacopidae
Phacops sp. Emmrich 1839 trilobite
 Phacopida - Acastidae
Greenops sp. Delo 1935 trilobite
Strophomenata
 Strophomenida - Leptostrophiidae
 Strophomenida - Douvillinidae
 Strophomenida - Chonetidae
 Productida - Productellidae
Rhynchonellata
 Spiriferida - Spinocyrtiidae
 Spiriferida - Ambocoeliidae
Ambocoelia sp. Hall 1860
 Spiriferida - Elythidae
 Spiriferinida - Cyrtinidae
Cyrtina sp. Davidson 1858
 Athyridida - Parazygidae
 Athyridida - Athyrididae
 Athyridida - Nucleospiridae
Nucleospira sp. Hall 1859
 Athyridida - Meristellidae
 Orthida - Rhipidomellidae
Stenolaemata
 Cystoporida - Sulcoreteporidae
 Cryptostomata - Fenestellidae
Bivalvia
 Ostreida - Pterineidae
Actinopteria sp. Hall 1884 oyster
 Modiomorphida - Cypricardiniidae
Cypricardinia sp. Hall 1860 clam
Gastropoda
 Euomphalina - Platyceratidae
Platyceras sp. Conrad 1840 snail