Geologic units in Evangeline Parish, Louisiana

Additional scientific data in this geographic area

Prairie Terraces (Pleistocene) at surface, covers 47 % of this area

Light gray to light brown clay, sandy clay, silt, sand, and some gravels.

Intermediate Terraces (Pleistocene) at surface, covers 22 % of this area

Light gray to orange-brown clay, sandy clay, and silt; much sand and gravel locally. Overlain by 1-9 meters of loess.

Alluvium (Holocene) at surface, covers 20 % of this area

Gray to brownish gray clay and silty clay, reddish brown in the Red River Valley, some sand and gravel locally.

Prairie Terraces (Pleistocene) at surface, covers 5 % of this area

Light gray to light brown clay, sandy clay, silt, sand, and some gravels. Overlain by 1-9 meters of loess.

Intermediate Terraces (Pleistocene) at surface, covers 3 % of this area

Light gray to orange-brown clay, sandy clay, and silt; much sand and gravel locally.

Natural Levees (Holocene) at surface, covers 3 % of this area

Gray and brown silt, silty clay, some very fine sand, reddish brown along the Red River.