Holocene series

Alluvium - clay, silt, sand, and gravel.
State Missouri
Name Holocene series
Geologic age Quaternary-Holocene Series
Lithologic constituents
Major
Unconsolidated > Fine-detrital > Clay (Alluvial)
Unconsolidated > Coarse-detrital > Sand (Alluvial)
Unconsolidated > Fine-detrital > Silt (Alluvial)
Minor
Unconsolidated > Coarse-detrital > Gravel (Alluvial)
Comments Alluvial deposits in major stream channels
References

Howe, W.B. and Koenig, 1961, The Stratigraphic Succession in Missouri: Missouri Geological Survey and Water Resources, Vol XL. 2nd Series.

NGMDB product
Counties Andrew - Atchison - Bollinger - Boone - Buchanan - Butler - Callaway - Cape Girardeau - Carroll - Chariton - Clark - Clay - Cole - Cooper - Dunklin - Franklin - Gasconade - Holt - Howard - Jackson - Jefferson - Lafayette - Lewis - Lincoln - Marion - Mississippi - Moniteau - Montgomery - New Madrid - Osage - Pemiscot - Perry - Pike - Platte - Ralls - Ray - Ripley - Saint Charles - Sainte Genevieve - Saint Louis - Saline - Scott - Stoddard - Warren - Wayne - Saint Louis