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L6 Volcanic neck and dyke. Ship Rock, New Mexico, USA
Position:
N36° 40'
W108° 40' approx.
Elevation:
2188' / 667m
Image format:
MF 35mm
VOLCANIC NECK & DYKE
The NECK is the durable core of an old volcano. All the ASH and
cindery LAVA that had surrounded the neck has been eroded away.
Extending from the neck is a wall of IGNEOUS ROCK called a DYKE.
The dyke would have been a FISSURE in the rocks that became enlarged
and filled by the rise of molten rock (MAGMA) from within the
earth's crust. This neck is called SHIP ROCK and represents the
skeleton of a former volcano. It rises over 1000' (600m) above
the PLAIN. This area of New Mexico, USA is very ARID and there
is little vegetation. The ancient Indian tribal American people
of the region called the rock "Tse'Bit'a'i'" which means "The
Winged Rock". Can you see why? SHIP ROCK rises almost 2200' /
670m above the PLAIN and can be seen from distant places.
Less detail
Image Trail:
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
L48 Granite dykes intruding slate. Cornwall, USA
L49 Dormant volcano. Mt Shasta. California, USA
L52 Igneous dyke intrusion. Convict Lake. Cornwall, USA
L79 Glacial Polish on polygonal basalt, Devil's Post Pile, California,
USA
Links:
http://geography.com.sg/tectonics/index.html
www.rockymesa.com/shiprock.htm
www.volcano.und.nodak.edu/vw.html |
