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Geologic units in Marion county, Texas

Queen City Sand (Eocene) at surface, covers 47 % of this area

Queen City Sand

Alluvium (Holocene) at surface, covers 15 % of this area

Alluvium

Reklaw Formation (Eocene) at surface, covers 15 % of this area

Reklaw Formation

Terrace deposits (Pleistocene and Holocene) at surface, covers 10 % of this area

Terrace deposits

Wilcox Group, undivided (Paleocene to Eocene) at surface, covers 6 % of this area

Wilcox Group, undivided

Weches Formation (Eocene) at surface, covers 5 % of this area

Weches Formation

Quaternary deposit, undivided (Quaternary) at surface, covers 1 % of this area

Quaternary deposit, undivided

Sparta Sand (Eocene) at surface, covers 0.7 % of this area

Sparta Sand