San Isabel Granite Geological Map

Assigned with unnamed units and ten named units to middle proterozoic berthoud plutonic suite a new lithodemic unit defined in this report.

San isabel granite geological map. It would have been just as logical to have shown this whole area in the color denoting the rocks of the leech river group. Geological survey national geologic map database. Usgs national water census water budget data resources for the san ambrosia santa isabel huc 13080002 turn off compatibility view settings in ie if having problems viewing this site epa watershed assessment tracking and environmental results waters for the san ambrosia santa isabel huc 13080002. Kevin vernal mesa curecanti eolus and trimble granites or quartz monzonites.

Kevin granite vernal mesa quartz monzonite curecanti quartz monzonite eolus granite. On the accompanying geological map of the san juan islands a large area in the vicinity of mount pickett range is shown in the color denoting the turtleback complex. Geologic map of the precambrian basement in colorado. Geologic map scale 1 1 000 000 summary.

1900 1990 contact nancy stamm with comments and questions about the cards. These maps overlay forest service assets such as roads trails and campgrounds on usgs s topographic maps. Also san isabel granite of boyer 1962 and unnamed granitic rocks ash flow tuff of main volcanic sequence tertiary at surface covers 0 2 of this area. Since the 1800s the usgs and its partners the state geological surveys have been producing high quality standardized geologic maps of the nation.

They are available for download by quadrangle. Kevin vernal mesa curecanti eolus and trimble granites or quartz monzonites. Granite is a light colored igneous rock with grains large enough to be visible with the unaided eye. Cripple creek granite san isabel granite st.

Includes silver plume sherman cripple creek st. Usgs geologic names committee archives maintained ca. Offers pike and san isabel national forest maps for purchase online or by phone fax and mail. Geology of the precambrian basement in colorado u s.

Granite is composed mainly of quartz and feldspar with minor amounts of mica amphiboles and other minerals this mineral composition usually gives granite a red pink gray or white color with dark mineral. Also san isabel granite of boyer 1962 and unnamed granitic rocks carlile shale greenhorn limestone and graneros shale cretaceous at surface covers 0 1 of this area. It forms from the slow crystallization of magma below earth s surface. Geological survey professional paper 1321 a.

Check out the national geologic map database ngmdb which is the national archive of these maps and related geoscience reports.