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BASEMAPS
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WEATHER
Fentress Formation
Geologic Formation
in
TN
,
KY
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Lithology
Shale
Sandstone
Siltstone
Other
(251 mi²)
Geologic Age
Pennsylvanian (323.6 Ma – 299.05 Ma ago)
Geologic Unit Label
PAf
Mostly dark-gray to light-brown shale, with minor siltstone and sandstone. Wilder coal near middle. Laterally equivalent to entire Gizzard Group and all of Crab Orchard Mountains Group below Rockcastle Conglomerate. Thickness as much as 340 feet.
—
USGS
Taxonomy
Classified As
Geologic Formation
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