Walker Mountain 25 (WK25) (Ordovician of the United States)

Where: Smyth County, Virginia (36.9° N, 81.5° W)

• Paleocoordinates: 20.1° S, 113.1° W (Wright 2013)

• coordinate estimated from map

• small collection-level geographic resolution

When: Martinsburg Formation, Caradoc (458.4 - 449.5 Ma)

• Total unit thickness = 16.15 m

•Time interval = Trentonian-Maysvillian

•

•Stratigraphic and geologic descriptions based on Kreisa (1980)

• group of beds-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; shale and gray, calcareous siltstone

• Stratigraphic and geologic descriptions based on Kreisa (1980); within Kreisa's mixed clastic-carbonate platform facies
• shale and siltstone; siltstone calcareous, very thin bedded, medium gray to olive gray; shells in thin concentrations, several shell layers thick

Size class: macrofossils

Collection methods: bulk,

Primary reference: K. M. Layou. 2009. Ecological restructuring after extinction: the Late Ordovician (Mohawkian) of the eastern United States. Palaios 24:118-128 [K. Layou/K. Layou]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 85630: authorized by Karen Layou, entered by Karen Layou on 13.01.2009

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Rhynchonellata
 Orthida - Dalmanellidae
Dalmanella fertilis
Dalmanella fertilis Ulrich 1909
Strophomenata
 Strophomenida - Rafinesquinidae
Rafinesquina alternata
 Strophomenida - Sowerbyellidae
Sowerbyella curdsvillensis
Stenolaemata
  -
Stenolaemata "indet. A"
Stenolaemata "indet. A" Borg 1926
small ramose bryozoans