Walker Mountain 383 (WK383) (Ordovician of the United States)

Where: Smyth County, Virginia (36.9° N, 81.5° W: paleocoordinates 29.8° S, 61.9° W)

• coordinate estimated from map

• small collection-level geographic resolution

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

• Total unit thickness = 31.09 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; lithified, shelly/skeletal packstone and lithified, shelly/skeletal shale

• Stratigraphic and geologic descriptions based on Kreisa (1980); within Kreisa's mixed clastic-carbonate platform facies
• limestone (70%) and shale (30%); limestone is skeletal packstone (30%) and calcarenite (20%) and calcisiltite (20%), thin and very thin bedded; packstone-laminated bed couplets common; plane laminated and CWRL

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 85652: authorized by Karen Layou, entered by Karen Layou on 13.01.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Trilobita
 Asaphida - Asaphidae
Isotelus sp.
Isotelus sp. Dekay 1824 trilobite
Strophomenata
 Strophomenida - Rafinesquinidae
Rafinesquina alternata
 Strophomenida - Sowerbyellidae
Sowerbyella rugosa