- The
Sevilleta Metarhyolite (or
Sevilleta Formation) is a
geologic formation in
central New Mexico. It has a
radiometric age of 1665 ± 16 Ma, corresponding...
- most of the mountains'
steep western faces.
These include the
Sevilleta metarhyolite, with an age of 1665 ±16 Ma. The
southern part of the
Manzano Mountains...
-
overlain by
Phanerozoic units. The
middle schist is
interpreted as a
metarhyolite (a
metamorphosed rhyolite). The
crystallization age of the formation...
-
Mountains and
nearby ranges of
central New Mexico.
These are
mostly metarhyolite or
quartzite units with some
schist and amphibolite, and form a sequence...
-
identical in age and
isotope composition to the
underlying Sevilleta metarhyolite,
suggesting that the
sediments of the
quartzite were
weathered almost...
-
parts of the Blue Ridge. The
Catoctin Formation contains metabasalt,
metarhyolite, and
porphyritic rocks,
columnar jointing, low-dipping
primary joints...
- County, New Mexico,
United States Topo map USGS
Sandia Park
Geology Age of rock
Early Proterozoic Type of rock
Metarhyolite Climbing Easiest route Hike...
- and boulders.
Mineralogy consists of quartzite, sandstone, quartz, and
metarhyolite in red sand. As
Hollow Run
flows northward, it then runs into a Hornblende...
-
identical in age and
isotope composition to the
underlying Sevilleta metarhyolite,
suggesting that the
sediments of the
quartzite were
weathered almost...
- feet)
thick and has a uranium-lead
radiometric age of 1700 Mya. The
metarhyolite making up much of the
formation is
reddish orange in color, but ranges...
