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Mineral Resources > Online Spatial Data > Geology > by state > Colorado Geology

Geologic units in Teller county, Colorado

[Additional scientific data in this geographic area]

Pre-ash-flow andesitic lavas, breccias, tuffs, and conglomerates (Phanerozoic | Cenozoic | Tertiary) at surface, covers 2 % of this area

Includes several named units

Lithology: andesite; tuff; volcanic breccia (agglomerate)

Gravels and alluviums (Phanerozoic | Cenozoic | Quaternary) at surface, covers 0.2 % of this area

Includes Broadway and Louviers Alluviums

Lithology: gravel; alluvium

Fountain Fm (Phanerozoic | Paleozoic | Carboniferous Pennsylvanian Permian) at surface, covers 3 % of this area

Arkosic sandstone and conglomerate

Lithology: sandstone; conglomerate

Morrison Fm (Phanerozoic | Mesozoic | Jurassic) at surface, covers < 0.1 % of this area

Variegated claystone, mudstone, sandstone, and local beds of limestone

Lithology: mudstone; sandstone; limestone

Manitou Limestone and Sawatch Quartzite in Southern Front Range and Wet Mountains. One or more Ordovician Fms (Fremont Limestone, Harding Sandstone, and Manitou Dolomite), Dotsero Fm, Peerless Fm, and Sawatch Quartzite in west-ce (Phanerozoic | Paleozoic | Cambrian Ordovician) at surface, covers 0.4 % of this area

Dotsero Fm: Dolomite, in White River plateau only. Peerless Fm: sandstone and dolomite.

Lithology: limestone; dolostone (dolomite); quartzite; sandstone

Glacial drift (Phanerozoic | Cenozoic | Quaternary) at surface, covers 0.9 % of this area

Includes some unclassified glacial deposits

Lithology: glacial drift

Ogallala Fm (Phanerozoic | Cenozoic | Tertiary) at surface, covers 3 % of this area

Loose to well-cemented sand and gravel

Lithology: sandstone; conglomerate

Wall Mountain Tuff (Phanerozoic | Cenozoic | Tertiary) at surface, covers 0.8 % of this area

Early ash-flow tuff of Sawatch Range provenance

Lithology: ash-flow tuff

Middle Tertiary intrusive rocks (Phanerozoic | Cenozoic | Tertiary) at surface, covers 0.2 % of this area

Intermediate to felsic compositions

Lithology: plutonic rock (phanerit

Leadville Limestone, Williams Canyon Limestone , Manitou Limestone, and Sawatch Quartzite (Phanerozoic | Paleozoic | Cambrian Ordovician(?) Silurian(?) Devonian(?) Carboniferous) at surface, covers 0.2 % of this area

Lithology: limestone; quartzite

Granitic rocks of 1400-m.y. age group (Proterozoic | Mesoproterozoic) at surface, covers 9 % of this area

Includes Silver Plume, Sherman, Cripple Creek, St. Kevin, Vernal Mesa, Curecanti, Eolus, and Trimble Granites or Quartz Monzonites; also, San Isabel Granite of Boyer (1962) and unnamed granitic rocks

Lithology: granite; granodiorite; quartz monzonite

Intra-ash flow quartz latitic lavas (Phanerozoic | Cenozoic | Tertiary) at surface, covers 2 % of this area

Lithology: quartz latite

Older gravels and alluviums (Phanerozoic | Cenozoic | Quaternary) at surface, covers 0.4 % of this area

Includes Slocum, Verdos, Rocky Flats, and Nussbaum Alluviums in east, and Florida, Bridgetimber, and Bayfield Gravels in southwest

Lithology: gravel; alluvium

Rocks of Pikes Peak Batholith (1000-m.y. age group) (Proterozoic | Mesoproterozoic) at surface, covers 61 % of this area

Includes Pikes Peak, Mount Rosa, Windy Point, and Redskin Granites and unnamed rocks

Lithology: granite; granodiorite; quartz monzonite

Granitic rocks of 1700-m.y. age group (Proterozoic | Paleoproterozoic) at surface, covers 13 % of this area

Includes Boulder Creek -M.Y. AGE GROUP (AGE 1650-1730 M.Y.)--Includes Boulder Creek, Cross Creek, Denny Creek, Kroenke, Browns Pass, Powderhorn, Pitts Meadow, Bakers Bridge, and Tenmile Granites, Quartz Monzonites, or Granodiorites;

Lithology: granite; granodiorite; quartz monzonite

One or more Ordovician fms (Phanerozoic | Paleozoic | Ordovician) at surface, covers 0.2 % of this area

Fremont Limestone, Harding Sandstone, and Manitou Limestone

Lithology: limestone; sandstone

Eocene prevolcanic sedimentary rocks (Phanerozoic | Cenozoic | Tertiary) at surface, covers < 0.1 % of this area

South-central: Arkosic sand and bouldery gravel of Echo Park Alluvium. Southwest: includes Telluride Conglomerate and Blanco Basin Fm (arkosic mudstone, sandstone, and conglomerate)

Lithology: sandstone; conglomerate; mudstone

Biotitic gneiss, schist, and migmatite (Proterozoic | Paleoproterozoic) at surface, covers 1 % of this area

Locally contains minor hornblende gneiss, calc-silicate rock, quartzite, and marble. Derived principally from sedimentary rocks

Lithology: biotite gneiss; schist; migmatite; quartzite; marble

Oligocene sedimentary rocks (Phanerozoic | Cenozoic | Tertiary) at surface, covers 2 % of this area

Northwest: includes Duchesne River Fm (sandstone and shale; includes some rocks of Eocene age) and Bishop Conglomerate near Utah border. South-central: includes Florissant Lake Beds (tuffaceous shale and tuff) and Antero Fm (lime

Lithology: sandstone; shale; conglomerate