|
L49 Dormant volcano. Mt Shasta. California, USA
Position:
N41° 24' 34''
W122° 11' 38'' (summit position)
Elevation:
14162' /4317m (at the summit)
Image format:
35mm
DORMANT VOLCANO, MT SHASTA
This snow covered mountain towers to an elevation 14162' (over
4000m) in Northern California, USA. Built by frequent violent
ERUPTIONS of ASH and LAVA, over many thousands of years, Mt Shasta
is a sleeping giant - a DORMANT VOLCANO. The mountain is one of
a long chain of volcanoes that forms the CASCADE RANGE in America's
Pacific North West. The chain that runs in a line from Mt Lassen
in the south to Crater Lake, Oregon and Mts Hood, St Helens and
Rainier in the North, toward the Canadian border, has many active
volcanoes - Lassen erupted in 1915 and Mt St Helens had a sensational
explosive episode in 1980. These and many other violently eruptive
volcanoes are directly linked to colliding LITHOSPHERIC PLATES.
In this case an OCEANIC TECTONIC PLATE is colliding with a CONTINENTAL
PLATE along an ACTIVE DESTRUCTIVE PLATE MARGIN.
Less detail
Image Trail:
L6 Volcanic neck and dyke. Ship Rock. New Mexico, USA
L7 Igneous dyke radiating out from volcanic neck. Ship Rock. New
Mexico, USA
L19 Volcanic Neck. Devil's Tower. National Monument. Wyoming, USA
L20 Volcanic Neck. Devil's Tower. National Monument. Wyoming, USA
L79 Glacial Polish on polygonal basalt, Devil's Post Pile, California,
USA
L80 The Giant's Causeway, Co. Antrim, Northern Ireland, UK
Links:
www.volcano.und.edu/cgi-bin/big_search.cgi?keywords=Shasta www.volcano.und.nodak.edu/vwdocs/volc_images/north_ america/california/shasta.html
www.wwwdwatcm.wr.usgs.gov/fs_landslide.html
www.water.wr.usgs.gov/shasta/introduction.html |
