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Irwinton Sand

Irwinton Sand (Ei), up-dip equivalent of Twiggs Clay, Sandersville Limestone, and Cooper Marl. As mapped, also includes younger clastics of indefinite Late Tertiary age.
State Georgia
Name Irwinton Sand
Geologic age Eocene
Comments Coastal Plain sedimentary rocks
Primary rock type sand
Secondary rock type
Other rock types
Lithologic constituents
Major
Unconsolidated > Coarse-detrital > Sand
Map references
Lawton, D.E., and others, 1976, Geologic Map of Georgia: Georgia Geological Survey, scale = 1:500,000.
Unit references
Lawton, D.E., and others, 1976, Geologic Map of Georgia: Georgia Geological Survey, scale = 1:500,000.
Counties Baldwin - Bibb - Burke - Columbia - Glascock - Hancock - Jefferson - Jenkins - Jones - McDuffie - Richmond - Screven - Twiggs - Warren - Washington - Wilkinson