Nearshore zone -1, Tunnel Hill Quadrangle, US Highway 41 (Ordovician of the United States)
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: Caradoc (460.9 - 449.5 Ma)
• No information given
Environment/lithology: shallow subtidal; red, yellow sandstone and yellow anthracite
• \"The zone is predominantly composed of red and yellow siltstone which alternate with irregularity. The top of the zone is marked in the north and south ends of the strike belt by a 4 foot bed of yellowish sandstone; in the central part of the strike belt the sandstone is replaced by a bed of arenaceous siltstone. . . . a fossil horizon occurs in a yellow siltstone about 20 feet below the top of the zone . . . Scattered through the zone in the northern and southern parts are three or four thin beds of yellowish-gray sandstone which may or may not contain small scattered quartz pebbles."
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 32465: authorized by Steven Holland, entered by Tori Hanson on 01.07.2003