Geologic units in Richland Parish, Louisiana

Additional scientific data in this geographic area

Braided Stream Terraces (Pleistocene) at surface, covers 55 % of this area

Light gray, tan and brown fine to coarse sand; some clay silt and gravel.

Alluvium (Holocene) at surface, covers 16 % of this area

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

Natural Levees (Holocene) at surface, covers 15 % of this area

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

Braided Stream Terraces (Pleistocene) at surface, covers 14 % of this area

Light gray, tan and brown fine to coarse sand; some clay silt and gravel. Overlain by 1-9 meters of loess.