- In geology,
felsic is a
modifier describing igneous rocks that are
relatively rich in
elements that form
feldspar and quartz. It is
contrasted with mafic...
- into four
chemical types based on
silica content:
felsic, intermediate, mafic, and ultramafic.
Felsic or
silicic lavas have a
silica content greater than...
-
viscosity similar to thick, cold mol****es or even
rubber when erupted.
Felsic magma, such as rhyolite, is
usually erupted at low
temperature and is up...
- of the
ratio between generally dark
mafic minerals and
generally light felsic minerals in an
igneous rock. The
color index of an
igneous rock is the volume...
-
material had formed. The
series is
divided into two branches, the
continuous (
felsic minerals: feldspars) and the
discontinuous (mafic minerals). The minerals...
-
unconsolidated sediments. The
typical location for VMS
deposits is at the top of the
felsic volcanic sequence,
within a
sequence of
volcaniclastic tuffaceous epiclastics...
-
fragmental rocks and m****ive flows, as well as
felsic tuffs,
tholeiitic pillow basalts and
minor porphyritic felsic flows. Siltstone, greywacke, iron formation...
-
pegmatite m****es
occur with granite.
Granite forms from silica-rich (
felsic) magmas.
Felsic magmas are
thought to form by
addition of heat or
water vapor to...
- The
Acasta Gneiss Complex, also
called the
Acasta Gneiss, is a body of
felsic to
ultramafic Archean ba****t rocks, gneisses, that form the northwestern...
- into four
chemical types based on
silica content:
felsic, intermediate, mafic, and ultramafic.
Felsic or
silicic magmas have a
silica content greater than...
