Where: Whitfield County, Georgia (34.8° N, 85.0° W: paleocoordinates 29.4° S, 65.9° W)
• coordinate estimated from map
• small collection-level geographic resolution
When: Lourdes Formation, Caradoc (458.4 - 449.5 Ma)
• No information given
Environment/lithology: shallow subtidal; red, yellow siltstone and yellow sandstone
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•The middle part of the zone at Hamilton Mountain is composed of red siltstone with a bed of conglomeratic sandstone 2 feet thick at its base.
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•The lower half of the zone is composed of red and yellow alternating beds of thinly laminated siltstone. About 5 feet above the base occurs a fossil horizon containing both identifiable and unidentifiable fragments of brachiopods and bryozoa.
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•The lowest member of the zone is a bed of medium-grained yellowish sandstone about 2 to 4 feet thick. In some sections small pebbles randomly scattered through it give it a loose conglomeratic texture."
Size class: macrofossils
Primary reference: A. T. Allen and J. G. Lester. 1957. Zonation of the Middle and Upper Ordovician strata in northwestern Georgia. Georgia State Division of Conservation, the Geological Survey Bulletin 66:1-104 [S. Holland/T. Hanson/T. Hanson]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 32456: authorized by Steven Holland, entered by Tori Hanson on 01.07.2003
Creative Commons license: CC BY (attribution)
Taxonomic list
| Rhynchonellata | |
"Zygospira recurvirostris" = Anazyga recurvirostra
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Camarotoechia sp. Hall and Clarke 1893 | |
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| Strophomenata | |
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Sowerbyella sp. Jones 1928 | |