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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.
StateGeorgia
NameIrwinton Sand
Geologic ageEocene
Original map labelEi
CommentsCoastal Plain sedimentary rocks
Primary rock typesand
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.
Geographic coverageBaldwin - Bibb - Burke - Columbia - Glascock - Hancock - Jefferson - Jenkins - Jones - McDuffie - Richmond - Screven - Twiggs - Warren - Washington - Wilkinson

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URL: http://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=GAEOi;1
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