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Geologic units in Burnet county, Texas

Glen Rose Limestone (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 11 % of this area
Glen Rose Limestone
Lithology: limestone; clay or mud; sandstone; conglomerate
Walnut Clay (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 20 % of this area
Walnut Clay
Lithology: clay or mud; limestone; shale
Wilberns Formation showing Point Peak, Morgan Creek Limestone, and Welge Sandstone Members, undivided (Phanerozoic | Paleozoic | Cambrian-Furongian) at surface, covers 2 % of this area
Wilberns Formation showing Point Peak, Morgan Creek Limestone, and Welge Sandstone Members, undivided
Lithology: limestone; medium-grained mixed clastic; conglomerate; siltstone
Terrace deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers 0.6 % of this area
Terrace deposits
Lithology: terrace; sand; gravel; silt; clay or mud
Cow Creek Limestone, Hammett Shale, and Sycamore Sand, undivided (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 2 % of this area
Cow Creek Limestone, Hammett Shale, and Sycamore Sand, undivided
Lithology: limestone; shale; fine-grained mixed clastic
Hensell Sand (Phanerozoic | Mesozoic | Cretaceous-Early [Comanchean) at surface, covers 3 % of this area
Hensell Sand
Lithology: limestone; sand; conglomerate; shale
Marble Falls Limestone (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian [Morrow]) at surface, covers 3 % of this area
Marble Falls Limestone
Lithology: limestone; shale
Riley Formation showing Lion Mountain Sandstone and Cap Mountain Limestone Members, undivided (Phanerozoic | Paleozoic | Cambrian-Middle) at surface, covers 1 % of this area
Riley Formation showing Lion Mountain Sandstone and Cap Mountain Limestone Members, undivided
Lithology: limestone; sandstone; shale; siltstone
Smithwick Formation (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian-Middle [Atoka]) at surface, covers 2 % of this area
Smithwick Formation
Lithology: fine-grained mixed clastic; limestone; shale; sandstone; conglomerate
Quaternary deposit, undivided (Phanerozoic | Cenozoic | Quaternary) at surface, covers 0.1 % of this area
sand, silt, clay, and gravel. locally indurated with calcium carbonate (caliche); includes point bar, natural levee, stream channel, sand dune, terrace, alluvial fan, landslide bolson and playa deposits
Lithology: sand ; silt ; clay or mud; gravel; carbonate
Travis Peak Formation (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 1 % of this area
Travis Peak Formation
Lithology: conglomerate; sandstone; limestone
Paluxy Sand and Glen Rose Limestone, undivided (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 25 % of this area
Paluxy Sand and Glen Rose Limestone, undivided
Lithology: sandstone; limestone; claystone
Hickory Sandstone Member (Phanerozoic | Paleozoic | Cambrian-Middle) at surface, covers 1 % of this area
Hickory Sandstone Member
Lithology: sandstone; sandstone; conglomerate
Gorman Formation (Phanerozoic | Paleozoic| Ordovician-Early) at surface, covers 3 % of this area
Gorman Formation
Lithology: limestone; dolostone (dolomite)
Tanyard Formation (Phanerozoic | Paleozoic | Ordovician-Early) at surface, covers 7 % of this area
Tanyard Formation
Lithology: limestone; dolostone (dolomite)
Barnett Formation, Chappel Limestone, Houy, Zesch, Bear Spring, and Stribling Formations, and Pillar Bluff Limestone, undivided (Phanerozoic | Paleozoic | Devonian Carboniferous Mississippian-Early Mississippian-Middle Mississippian-Late) at surface, covers 0.2 % of this area
Barnett Formation, Chappel Limestone, Houy, Zesch, Bear Spring, and Stribling Formations, and Pillar Bluff Limestone, undivided
Lithology: limestone; shale; phosphorite; dolostone (dolomite); chert
Town Mountain Granite (preCambrian-Proterozoic) at surface, covers 5 % of this area
Town Mountain Granite
Lithology: granite; porphyry
Wilberns Formation showing San Saba Member (Phanerozoic | Paleozoic | Cambrian-Furongian) at surface, covers 4 % of this area
Wilberns Formation showing San Saba Member
Lithology: dolostone (dolomite); limestone; sandstone
Packsaddle Schist (preCambrian-Proterozoic [Llano]) at surface, covers 0.4 % of this area
Packsaddle Schist
Lithology: amphibole schist; quartz-feldspar schist; mica schist; schist; amphibolite; quartzite; marble; granulite; gneiss
alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 1 % of this area
alluvium
Lithology: sand; silt; clay or mud; gravel
Valley Spring Gneiss (preCambrian-Proterozoic) at surface, covers 2 % of this area
Valley Spring Gneiss
Lithology: paragneiss; mica schist; amphibole schist
Honeycut Formation (Phanerozoic | Paleozoic | Ordovician-Early) at surface, covers 3 % of this area
Honeycut Formation
Lithology: dolostone (dolomite); limestone

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Page Last modified: 10:03 on 08-May-2012