
STS110-706-54
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Mendoza, Argentina: The Andes continue to rise and thrust
faults move successive slabs of rock and sediment eastward, over the
adjacent basin. Traces of active faults, such as the one that
produced an earthquake which destroyed many buildings in Mendoza in
1985, can be seen to pass from the valley floor straight through the
city center.
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STS110-706-57
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San Juan, Argentina: In 1944 San Juan was virtually leveled by
an earthquake, produced by the ongoing collision of the South
American and Pacific tectonic plates and the growth of the Andes.
Just north of the city, the traces of such active faults can be seen
to cut the valley floor sediments and to continue southward beneath
the town. Relief on these young fault scarps ranges from about a foot
to tens of feet. The narrow ranges of sedimentary rock lying west of
San Juan consist of rock layers that were part of North America until
about 460 million years ago.
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STS110-742-50
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Lake Argentino, Lower Argentina: This picturesque freshwater
lake is fed by snow and glacier melt water from the Southern
Patagonian Ice Field to the west (under clouds). Note the two
largest glaciers: Upsala entering from the north and Perito Moreno
from the south.
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STS110-718-67
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SE Caspian Sea, with Kara Bogaz Gulf, full.
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STS61A-200-34
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Kara Bogaz Gulf, empty (1985 COMPARATIVE).
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STS110-707-35
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Tien Shan Mts., Central Asia: Snow and shadows emphasize the
faults and tilted rock layers in the Tien Shan. One of the most
obvious products of the collision of India with Eurasia is the
Himalayan mountain chain. The Tien Shan are also rising now, in
response to that same convergence of continental masses -- one of the
distant inboard effects of the collision.
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STS110-740-69
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SW Baykal, Hövsgöl rift, and a newly imaged rift valley west of
Hövsgöl.
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STS110-740-80
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Lake Hövsgöl, Mongolia: At 5,400 feet, this large lake in
northern Mongolia still remains solidly frozen from this winter.
Note the shadows cast on the ice by the rugged mountains near the
western shore.
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STS110-710-40
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Lake Achit, Mongolia: This freshwater lake is situated at
over 4,700 feet of elevation in an arid basin in Western Mongolia.
Both thawing and possible refreezing are evident in this photo.
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STS110-718-20
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SW U.S.A. and N. Mexico: Several major physiographic and
tectonic provinces are embraced by this fine view: the forested
Mogollon Rim defines the edge of the relatively flat-lying Colorado
Plateau. Between there and the Sierra Nevada are the stubby ranges
and light-colored basins of the Basin and Range Province, where the
crust of the continent is being stretched. The Gulf of California
marks the location of a rift zone, and farther north is the San
Andreas fault system -- a transform fault boundary between the North
American and Pacific tectonic plates.STS110-718-28=Colorado Plateau,
Uinta Mts., Sangre de Cristo, Jemez Mts., Rio Grande rift. As with
718-20, this panorama takes in several physiographic and tectonic
elements: the Colorado Plateau, ranges of the Rocky Mt. chain (Uinta
Mts., Sangre de Cristo), and the Rio Grande rift. The Jemez volcanic
complex (near center) occupies the intersection of a Rio Grande rift
fault and transverse fault zone that crosses the rift.
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