Horizon 20, Centerfield Member, Browns Creek, Genesee Valley, Livingston Co., NY (Devonian of the United States)

Where: Livingston County, New York (42.9° N, 77.9° W: paleocoordinates 36.6° S, 25.4° 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 upper transitional shales of the Wheeler Gully submember of the Centerfield

• bed-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; gray, calcareous 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 8788: 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
 Favositida - Favositidae
Favosites sp. Lamarck 1816 tabulate coral
 Auloporida - Aulocystidae
Aulocystis sp. Schlüter 1885 tabulate coral
 Stauriida - Stereolasmatidae
Stereolasma sp. Simpson 1900 horn coral
 Stauriida - Eridophyllidae
Eridophyllum sp. Milne-Edwards and Haime 1850 horn coral
 Stauriida - Zaphrentidae
Heliophyllum sp. Hall 1846 horn coral
Strophomenata
 Strophomenida - Douvillinidae
Rhynchonellata
 Spiriferinida - Cyrtinidae
Cyrtina sp. Davidson 1858
 Spiriferida - Spinocyrtiidae
 Spiriferida - Ambocoeliidae
Ambocoelia sp. Hall 1860
 Spiriferida - Elythidae
Stenolaemata
 Cystoporata - Fistuliporidae
 Cryptostomata - Fenestellidae
 Cystoporida - Sulcoreteporidae
Trilobita
 Phacopida - Phacopidae
Phacops sp. Emmrich 1839 trilobite