Igneous rocks of Austin age

Igneous rocks of Austin age
State Texas
Name Igneous rocks of Austin age
Geologic age Late Cretaceous
Lithologic constituents
Major
Igneous > Volcanic > Mafic-volcanic > Basalt (Pyroclastic, Flow)
Incidental
Igneous > Hypabyssal > Mafic-hypabyssal > Hypabyssal-basalt
Comments Alkalic basalt, and pyroclastic rocks altered to nontronite; in form of sills, laccoliths, volcanic necks, and dikes
References

Bureau of Economic Geology, 1974, San Angelo Sheet, Geologic Atlas of Texas, Bureau of Economic Geology, University of Texas at Austin, scale 1:250,000.

Bureau of Economic Geology, 1992, Geologic Map of Texas: University of Texas at Austin, Virgil E. Barnes, project supervisor, Hartmann, B.M. and Scranton, D.F., cartography, scale 1:500,000.

NGMDB product
Counties Kinney - Travis - Uvalde - Zavala