Migmatite in the Precambrian of Colorado, USA.
Migmatites are very high grade metamorphic rocks that form by partial melting of gneisses. The felsic minerals have melted, cooled, and recrystallized - they form the light-colored, crystalline-textured bands in the rock. The mafic minerals have higher melting temperatures and still retain their metamorphic foliated character.
The outcrop seen here is an Paleoproterozoic-aged migmatite at the Rocky Mountain Front in Colorado. This is part of the local Precambrian basement. Upper Paleozoic redbeds are nonconformably overlying the basement in the area.
Stratigraphy: "Idaho Springs Formation", late Paleoproterozoic, ~1.7 Ga
Locality: Red Rocks Park, west of Denver, north-central Colorado, USA
Tags: migmatite Idaho Springs Formation Precambrian Proterozoic Paleoproterozoic Rocky Mountain Front Red Rocks Park Denver Colorado
Migmatite in the Precambrian of Colorado, USA.
Migmatites are very high grade metamorphic rocks that form by partial melting of gneisses. The felsic minerals have melted, cooled, and recrystallized - they form the light-colored, crystalline-textured bands in the rock. The mafic minerals have higher melting temperatures and still retain their metamorphic foliated character.
The outcrop seen here is an Paleoproterozoic-aged migmatite at the Rocky Mountain Front in Colorado. This is part of the local Precambrian basement. Upper Paleozoic redbeds are nonconformably overlying the basement in the area.
Stratigraphy: "Idaho Springs Formation", late Paleoproterozoic, ~1.7 Ga
Locality: Red Rocks Park, west of Denver, north-central Colorado, USA
Tags: migmatite Idaho Springs Formation Precambrian Proterozoic Paleoproterozoic Rocky Mountain Front Red Rocks Park Denver Colorado
Migmatite in the Precambrian of Colorado, USA.
Migmatites are very high grade metamorphic rocks that form by partial melting of gneisses. The felsic minerals have melted, cooled, and recrystallized - they form the light-colored, crystalline-textured bands in the rock. The mafic minerals have higher melting temperatures and still retain their metamorphic foliated character.
The outcrop seen here is an Paleoproterozoic-aged migmatite at the Rocky Mountain Front in Colorado. This is part of the local Precambrian basement. Upper Paleozoic redbeds are nonconformably overlying the basement in the area.
Stratigraphy: "Idaho Springs Formation", late Paleoproterozoic, ~1.7 Ga
Locality: Red Rocks Park, west of Denver, north-central Colorado, USA
Tags: migmatite Idaho Springs Formation Precambrian Proterozoic Paleoproterozoic Rocky Mountain Front Red Rocks Park Denver Colorado
Migmatite in the Precambrian of Colorado, USA.
Migmatites are very high grade metamorphic rocks that form by partial melting of gneisses. The felsic minerals have melted, cooled, and recrystallized - they form the light-colored, crystalline-textured bands in the rock. The mafic minerals have higher melting temperatures and still retain their metamorphic foliated character.
The outcrop seen here is an Paleoproterozoic-aged migmatite at the Rocky Mountain Front in Colorado. This is part of the local Precambrian basement. Upper Paleozoic redbeds are nonconformably overlying the basement in the area.
Stratigraphy: "Idaho Springs Formation", late Paleoproterozoic, ~1.7 Ga
Locality: Red Rocks Park, west of Denver, north-central Colorado, USA
Tags: migmatite Idaho Springs Formation Precambrian Proterozoic Paleoproterozoic Rocky Mountain Front Red Rocks Park Denver Colorado
Migmatite in the Precambrian of Colorado, USA.
Migmatites are very high grade metamorphic rocks that form by partial melting of gneisses. The felsic minerals have melted, cooled, and recrystallized - they form the light-colored, crystalline-textured bands in the rock. The mafic minerals have higher melting temperatures and still retain their metamorphic foliated character.
The outcrop seen here is an Paleoproterozoic-aged migmatite at the Rocky Mountain Front in Colorado. This is part of the local Precambrian basement. Upper Paleozoic redbeds are nonconformably overlying the basement in the area.
Stratigraphy: "Idaho Springs Formation", late Paleoproterozoic, ~1.7 Ga
Locality: Red Rocks Park, west of Denver, north-central Colorado, USA
Tags: migmatite Idaho Springs Formation Precambrian Proterozoic Paleoproterozoic Rocky Mountain Front Red Rocks Park Denver Colorado