National Park Service U.S. Department of the Interior
Find a Park
Working with Communities
Results 31-40 of about 44,700 for: most abundant igneous rock of yosemite
Radiolarian Ribbon Chert
Basalt is the
on the planet. When hot basalt erupts from an underwater volcano, cold seawater hardens lava into
Half Dome Day Hike -
National Park (U.S. National ...
Rising nearly 5,000 feet above
Valley ... (the cables and
become very slick when wet;
... Some of the
USGS: Geological Survey Bulletin 1191 (Glossary)
formed by solidification of hot molten material, ... Porphyry, an
phenocrysts set in a finer grained groundmass.
Geologic Glossary A through C
with the same mineral ... Basalt makes up
of the ocean floor and is the
in the Earth’s crust ...
Activity 6: Metamorphic
- Bryce Canyon National Park (U ...
can begin as
, ... All metamorphic
have one thing in
, time. The longer a
is exposed to one or all of the ...
California Division of Mines and Geology: Bulletin 182 ...
VALLEY AREA, CALIFORNIA* ... Quartz moderately
the only ferromagnesian mineral is biotite ...
The Geology of Mount Rainier National Park (Geology)
The presence of granular
at the base of Mount Rainier was first mentioned by Lieutenant Kautz in 1857 and ... so
in the Cascade batholiths, ...
USGS: Geological Survey Professional Paper 160 (Early History ...
point for ... the development of the
are ... of
yields to the agents of ...
National Park and an Account of the Origin ...
EFFECT OF GLACIATION. The question may be raised at this point whether the foregoing general explanation also applies to the
and Hetch Hetchy Valleys.
California Division of Mines: Special Report 68 -
Special Report 68
of the Western Portion of Joshua Tree National Monument, Riverside and San Bernardino Counties, California
Frequently Asked Questions
No Fear Act