Pinnacles National Monument
- Pinnacles National Monument
-
area of spirelike rock formations 500 to 1,
200 feet (
150 to 365 metres)
high in the hilly Gabilan Range of west-
central California,
U.
S.
The pinnacles lie just west of the San Andreas Fault (
the main component of the San Andreas Rift Zone),
about 25 miles (
40 km)
southeast of Salinas.
The monument,
created in 1908,
has an area of 25 square miles (
65 square km);
another 12 square miles (
32 square km)
was added by presidential proclamation in 2000,
a portion of which subsequently has been acquired.
The pinnacles were formed by volcanic activity about 23 million years ago during the Tertiary Period some 195 miles (
315 km)
south of their present location.
They have moved slowly northwestward by tectonic activity as the Pacific Plate has slid along the edge of the North American Plate;
a remnant of the formation still exists in its original location,
a short distance northeast of Los Angeles.
The monument also has talus caves that can be explored and is popular with hikers and rock climbers.
A foot trail leads to the highest point,
North Chalone Peak,
which reaches 3,
304 feet (
1,
007 metres).
The monument'
s surface is covered by chaparral vegetation;
deer,
rabbits,
foxes,
mountain lions,
tarantulas,
and the Townsend'
s big-
eared bat (
Plecotus townsendii)
are among the wildlife found there.
* * *
Universalium.
2010.
Look at other dictionaries:
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