| State | Louisiana |
|---|---|
| Name | Alluvium |
| Geologic age | Holocene |
| Lithologic constituents |
Major
Unconsolidated > Fine-detrital > Clay (Alluvial)
Minor
Unconsolidated > Coarse-detrital > Sand (Alluvial)
Unconsolidated > Coarse-detrital > Gravel (Alluvial)
|
| Comments | Includes all alluvial valley deposits except natural levees of major streams. |
| References | Snead, J.I., and Mcculloh, R.P., 1984, Geologic Map of Louisiana: Louisiana Geological Survey, scale 1:500,000. |
| NGMDB product | |
| Counties | Acadia - Allen - Ascension - Assumption - Avoyelles - Beauregard - Bienville - Bossier - Caddo - Calcasieu - Caldwell - Cameron - Catahoula - Claiborne - Concordia - De Soto - East Baton Rouge - East Carroll - East Feliciana - Evangeline - Franklin - Grant - Iberia - Iberville - Jackson - Jefferson - Jefferson Davis - Lafayette - Lafourche - La Salle - Lincoln - Livingston - Madison - Morehouse - Natchitoches - Orleans - Ouachita - Plaquemines - Pointe Coupee - Rapides - Red River - Richland - Sabine - Saint Bernard - Saint Charles - Saint Helena - Saint James - Saint John the Baptist - Saint Landry - Saint Martin - Saint Mary - Saint Tammany - Tangipahoa - Tensas - Terrebonne - Union - Vermilion - Vernon - Washington - Webster - West Baton Rouge - West Carroll - West Feliciana - Winn |