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Mineral Resources > Online Spatial Data > Geology > by state > Louisiana Geology

Geologic units in Catahoula Parish, Louisiana

Intermediate Terraces (Phanerozoic | Cenozoic | Quaternary | Pleistocene) at surface, covers 0.2 % of this area

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

Lithology: clay or mud; silt; sand; gravel

Vicksburg Group (undifferentiated) (Phanerozoic | Cenozoic | Tertiary | Oligocene) at surface, covers 0.9 % of this area

brown to gray liginitic clays with thin interbeds of lignite or micaceous sands; calcareous shale, petrified wood, and bluish fossilferous clay locally. Overlain by 1-9 meters of loess.

Lithology: clay or mud; coal; sand; shale

Alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 40 % of this area

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

Lithology: clay or mud; sand; gravel

Natural Levees (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 31 % of this area

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

Lithology: silt; clay or mud; sand

High Terraces (Phanerozoic | Cenozoic | Quaternary | Pleistocene) at surface, covers 5 % of this area

tan to orange clay, silt, and sand with a large amount of basal gravels.

Lithology: clay or mud; silt; sand; gravel

Braided Stream Terraces (Phanerozoic | Cenozoic | Quaternary | Pleistocene) at surface, covers 0.6 % of this area

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

Lithology: sand; clay or mud; silt; gravel

Vicksburg Group (undifferentiated) (Phanerozoic | Cenozoic | Tertiary | Oligocene) at surface, covers 1 % of this area

brown to gray liginitic clays with thin interbeds of lignite or micaceous sands; calcareous shale, petrified wood, and bluish fossilferous clay locally.

Lithology: clay or mud; coal; sand; shale

Braided Stream Terraces (Phanerozoic | Cenozoic | Quaternary | Pleistocene) at surface, covers 8 % of this area

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

Lithology: sand; clay or mud; silt; gravel

Jackson Group (undifferentiated) (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers 0.3 % of this area

light gray to brown liginitic clays with thin interbeds of limonitic sands or lignite; near base,calcareous, glauconitic, and fossiliferous beds may weather to black soil.

Lithology: clay or mud; sand; coal

Catahoula Formation (Phanerozoic | Cenozoic | Tertiary | Oligocene) at surface, covers 3 % of this area

gray to white sandstones; loose quartz sand, tuffaceous sandstone, volcanic ash, and brown sandy clays; petrified wood locally.

Lithology: sandstone; sand; volcanic ash

Prairie Terraces (Phanerozoic | Cenozoic | Quaternary | Pleistocene) at surface, covers 0.3 % of this area

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

Lithology: clay or mud; silt; sand; gravel

Catahoula Formation (Phanerozoic | Cenozoic | Tertiary | Oligocene) at surface, covers 7 % of this area

gray to white sandstones; loose quartz sand, tuffaceous sandstone, volcanic ash, and brown sandy clays; petrified wood locally. Overlain by 1-9 meters of loess.

Lithology: sandstone; sand; volcanic ash

Jackson Group (undifferentiated) (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers 0.1 % of this area

light gray to brown liginitic clays with thin interbeds of limonitic sands or lignite; near base,calcareous, glauconitic, and fossiliferous beds may weather to black soil. Overlain by 1-9 meters of loess.

Lithology: clay or mud; sand; coal