| State | Louisiana |
|---|---|
| Name | Prairie Terraces |
| Geologic age | Pleistocene |
| Lithologic constituents |
Major
Unconsolidated > Coarse-detrital > Sand (Terrace-stream)
Unconsolidated > Fine-detrital > Clay (Terrace-stream)
Unconsolidated > Fine-detrital > Silt (Terrace-stream)
Minor
Unconsolidated > Coarse-detrital > Gravel (Terrace-stream)
|
| Comments | Surfaces generally show little dissection and are topographically higher than the Deweyville. Three levels are recognized:two along alluvial valleys, the lower coalescing with its broad coastwise expression;the third, still lower, found intermittently gulfward. |
| 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 - Avoyelles - Beauregard - Bienville - Bossier - Caddo - Calcasieu - Caldwell - Cameron - Claiborne - De Soto - East Baton Rouge - Evangeline - Franklin - Grant - Jackson - Jefferson Davis - Lafayette - La Salle - Lincoln - Livingston - Morehouse - Natchitoches - Ouachita - Rapides - Red River - Sabine - Saint Helena - Saint Landry - Saint Tammany - Tangipahoa - Union - Vermilion - Vernon - Washington - Webster - Winn |