| State | Texas |
|---|---|
| Name | Lost Creek Gneiss |
| Geologic age | preCambrian (Proterozoic) |
| Lithologic constituents | Major
Metamorphic > GneissMetasedimentary augen gneiss, distinct from Valley Spring Gneiss below, grades upward throught a sequence of alternating beds of augen gneiss and schist to Packsaddle Schist
|
| Comments | (following from Llano Sheet of Geologic Atlas of Texas) Metasedimentary augen gneiss, distinct fr. Valley Spring Gneiss below, grades up through a sequence of alternating beds of augen gneiss and schist to Packsaddle Schist. |
| References | Wilmarth, M.G., 1938, Lexicon of geologic names of the United States: U.S. Geological Survey Bulletin 896, 2396 p.https://pubs.er.usgs.gov/publication/b896 Bureau of Economic Geology, 1981, Llano sheet, Geologic Atlas of Texas, Bureau of Economic Geology, University of Texas at Austin, scale 1:250,000.Mutis-Duplat, Emilio, 1982, Geology of the Purdy Hill quadrangle, Mason County, Texas: Bureau of Economic Geology, the University of Texas at Austin, Geologic Quadrangle Map 52, scale 1:24.000.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 | Llano - McCulloch - Mason |