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

Geologic units in Isle of Wight county, Virginia

Shirley Formation (Quaternary) at surface, covers 9 % of this area

Shirley Formation - Interbedded gravel, sand, silt, clay, and peat; at altitudes to 35-45 ft. (top of unit).

Lithology: gravel; sand; silt; clay or mud; peat

Artificial Fill (Quaternary) at surface, covers 0.3 % of this area

Artificial Fill - Areas filled for construction and waste disposal

Lithology: unconsolidated deposit

Tabb Formtaion; Poquoson Member (Quaternary) at surface, covers 0.2 % of this area

Tabb Formtaion; Poquoson Member - Pebbly sand grading upward into muddy, fine-grained sand and sandy silt, at altitudes to 11 ft. (top of unit).

Lithology: sand; silt

Windsor Formation (Tertiary-Quaternary) at surface, covers 51 % of this area

Windsor Formation - Interbedded gravel, sand, silt, and clay; at altitudes to 85-95 ft. (top of unit).

Lithology: gravel; sand; silt; clay or mud

Chesapeake Group (Tertiary) at surface, covers 5 % of this area

Chesapeake Group - Fine- to coarse-grained sand, silt, clay; variably shelly and diatomaceous

Lithology: sand; silt; clay or mud

Alluvium (Quaternary) at surface, covers 7 % of this area

Alluvium - Poorly sorted organic material, clay, sand, and rounded pebbles and cobbles

Lithology: alluvium; clay or mud; sand

Charles City Formation (Quaternary) at surface, covers 17 % of this area

Charles City Formation - Interbedded sand, silt, clay and minor gravel; at altitudes to 70-80 ft. (top of unit).

Lithology: sand; silt; clay or mud; gravel

Tabb Formation; Sedgefield Member (Quaternary) at surface, covers 9 % of this area

Tabb Formation; Sedgefield Member - Pebbly to bouldery, clayey sand and shelly sand, at altitudes to 30 ft. (top of unit).

Lithology: sand

Chuckatuck Formation (Quaternary) at surface, covers 1 % of this area

Chuckatuck Formation - Interbedded gravel, sand, silt, clay, and minor peat; at altitudes to 50-60 ft. (top of unit).

Lithology: gravel; sand; silt; clay or mud; peat