STS101-720-58
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Spacecraft nadir point: 51.6° N, 98.5° E

Photo center point: 51.5° N, 100.0° E

Nadir to Photo Center: East

Spacecraft Altitude: 200 nautical miles (370km)
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Image Caption: Lake Hovsgol Rift & Transform Fault
Lake Hovsgol, north-central Mongolia, occupies a rift valley (graben)
that is linked with the Baykal rift system, 200 km farther east in the
southeastern Russian Federation. This exceptional view shows not only
Hovsgol but also another rift valley to the west, which is of similar
size but lacks a lake; the eastern and western margins of both are
normal faults that drop the valley floors down. A straight,
east-trending transform fault zone bounds the valleys on the north; this
transform zone extends eastward, linking the Hovsgol complex with the
great Baykal rift. Photos STS101-720-58 and STS101-720-61 form a stereo
pair; structural details of this remote and seldom-imaged region are now
being mapped for publication by Office of Earth Sciences staff and
Russian colleagues in Irkutsk.