Fort Rock State Monument, Oregon
Posted by: 
Volcanoguy
N 43° 21.678 W 121° 03.232
10T E 657695 N 4802777
Fort Rock is a spectacular wave-cut feature standing on the floor of a pluvial lake basin.
Waymark Code: WMFJB
Location: Oregon, United States
Date Posted: 06/24/2006
Views: 72
The dry Fort Rock basin was filled by pluvial Fort Rock Lake at the end of the last ice age. The most recent high stand of Fort Rock Lake occurred around 23,000 years ago and a shallow lake was still present about 13,000 years ago.
Fort Rock, with its spectacular wave-cut cliffs, is a tuff ring 4,500 feet in diameter and 200 feet high at its crest. The south side of the tuff ring has been breached by waves of Fort Rock Lake, giving easy access to the crater. The present crater floor is 20 to 40 feet above the floor of the lake basin. Wave-cut benches have been cut into the ring, the most prominent lies at an elevation of 4,430 feet.
Predominate Feature: Basaltic Tuff Ring
Parking/Access Location: N 43° 22.373 W 121° 03.966
Ownership: State
Terrain Rating: 
Admission Charged: no
Landmark's Website: [Web Link]
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Visitor should describe the experience of their visit.