Benbolt Fm, Burkes Garden Limestone Member, Thompson Valley (X-Bedded Limestone) (Ordovician of the United States)

Where: Tazewell County, Virginia (37.1° N, 81.5° W: paleocoordinates 29.6° S, 61.8° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Burkes Garden Limestone Member (Benbolt Formation), Caradocian (460.9 - 449.5 Ma)

• Ashbyan

• member-level stratigraphic resolution

Environment/lithology: coarse-grained, gray, cherty/siliceous limestone

• Coarse-grained clastic limestones, averaging 50 feet thick, cross-bedded, dark bluish gray to light gray to dark gray and cherty. Most of the zone is composed of light-gray pinkish clastic limestone similar to the Holston limestone of Tennessee.

Size class: macrofossils

Collection methods: Most conspicuous fossils listed.

Primary reference: B. N. Cooper and C. E. Prouty. 1943. Stratigraphy of the Lower Middle Ordovician of Tazewell County, Virginia. Bulletin of the Geological Society of America 54:819-886 [S. Holland/T. Hanson/T. Hanson]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 34172: authorized by Steven Holland, entered by Tori Hanson on 20.08.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Girvanella
  -
Girvanella sp. Nicholson and Etheridge 1878
unclassified
  -
"Cystoid" sp.
Cystoid columnals
Stenolaemata
  - Phylloporinidae
Chasmatopora sp. Eichwald 1860
 Cryptostomata - Escharoporidae
Graptodictya sp. Ulrich 1882
Strophomenata
 Strophomenida - Sowerbyellidae
Ptychoglyptus sp. Willard 1928
Rhodophyceae
  - Solenoporaceae
Solenopora sp. Dybowski 1877