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Mineral Resources On-Line Spatial Data
Mineral Resources On-Line Spatial Data
| State | Texas |
|---|---|
| Name | Hooper Formation |
| Geologic age | Phanerozoic | Cenozoic | Tertiary | Paleocene |
| Comments | Mostly mudstone with various amounts of sandst., minor lignite, ironstone concretions, and locally glauconite in lowermost part. Mudst. med gray to dk gray, weathers yell-brn. Sandst. in upper part---fine to med. grained, mod well sorted, crossbedded, units 5-30 ft thick; thickness as much as 500+-ft. |
| Primary rock type | mudstone |
| Secondary rock type | sandstone |
| Other rock types | |
| Lithologic constituents |
Major
Sedimentary > Clastic > Mudstone > Claystone (Bed)
Minor
Sedimentary > Clastic > Sandstone (Bed)
Incidental
Sedimentary > Coal > Lignite (Bed)
|
| Map references | 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 |
| Unit references | Bureau of Economic Geology, 1974, Austin Sheet, Geologic Atlas of Texas, University of Texas, Bureau of Economic Geology, scale 1:250,000. |
| Counties | Bastrop - Falls - Freestone - Lee - Limestone - Milam - Navarro - Robertson |