Where: England, United Kingdom (51.3° N, 2.7° W: paleocoordinates 14.7° S, 0.3° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Black Rock Formation, Tournaisian (358.9 - 346.7 Ma)

• bed 13 is broken into two parts, the bottom part is 64 feet thick with the top of this part located 490 feet above the base of the entire section; the basal chert band within the bottom part lies 27 feet below the top rock exposure in the corner buttress; the top part is 23 feet thick with the top of this part located 513 feet above the base of the section; base taken at lowest chert nodule, lowest chert band 3 feet above base

• bed-level stratigraphic resolution

Environment/lithology: marine; shelly/skeletal, black, gray, cherty/siliceous limestone

Preservation: replaced with silica

Collection methods: abundant silicified fossils found in upper part of bed

Primary reference: G. W. Green, M. A. Welch, and F. B. A. Welch. 1965. Geology of the Country around Wells and Cheddar (Explanation of One-inch Geological Sheet 280, New Series). Memoirs of the Geological Survey of Great Britain (280)1-225 [A. Miller/D. Carlson/O. Alfaro]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 8730: authorized by Arnold Miller, entered by Donna Carlson on 28.08.2000

Creative Commons license: CC BY (attribution)