| State | Texas |
|---|---|
| Name | Younger granitic intrusion |
| Geologic age | preCambrian (Proterozoic) |
| Lithologic constituents | Major
Igneous > Hypabyssal > Felsic-hypabyssal > Hypabyssal-felsic-alkaline (Dike or sill)Sixmile Granite, uniform fine-grained, commonly gray, but variable color, quartz-plagioclase-microcline rock, occurs as irregular intrusive bodies penetrating metamorphic rocks and Town Mountain Granite
|
| Comments | Oatman Creek Granite appears to be late differentiate of Town Mountain Granite. Younger granitic intrusions include aplogranite bodies and aplite dikes, pegmatite dikes, quartz masses |
| Stratigraphic units | Oatman Creek Granite, Sixmile Granite |
| References | Bureau of Economic Geology, 1981, Llano 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 | Blanco - Gillespie - Llano - Mason - San Saba |