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C. S. and R. S. Moore timber sale area on the Crater National Forest in 1911 showing good brush piling, low stumps, and the trees left in the selection cutting Crater National Forest was established by the U.S. Forest Service in Oregon on July 1, 1908 with 1,119,834 acres (4,531.81 km 2 ) from portions of Cascade , Klamath and, Siskiyou ...
The summit place is formed by a stone circle and low stone walls which are placed just above the slopes down into the main crater. A terrace-shaped stone structure forms the secondary crater, which is placed on its slopes. A smaller terrace is located on its northeastern side. Timber and wood are found around the stone structures. All these ...
More than 4,000,000,000 board feet (9,400,000 m 3) of timber were damaged or destroyed, mainly by the lateral blast. At least 25% of the destroyed timber was salvaged after September 1980. Downwind of the volcano, in areas of thick ash accumulation, many agricultural crops, such as wheat, apples, potatoes, and alfalfa, were destroyed.
Mazama and Crater Lake form part of the Mazama reach (section) of the Oregon Cascades, which stretches for 25 miles (40 km) from Timber Crater to the Big Bunchgrass shield volcano. This includes 175 Quaternary volcanic vents within a belt that ranges from 16 to 19 miles (25 to 30 km) in width, which has a high vent density with many shields and ...
The flows of Jordan Craters volcanic field are the youngest of a series of large Quaternary basalt fields in the eastern part of the U.S. state of Oregon.The field is thought to be approximately 3200 years old, based on findings of a lake sediment coring experiment in 1986.
Mount Thielsen (Klamath: hisc’akwaleeʔas), [4] is an extinct shield volcano in the Oregon High Cascades, near Mount Bailey.Because eruptive activity ceased 250,000 years ago, glaciers have heavily eroded the volcano's structure, creating precipitous slopes and a horn-like peak.
The mine was sprung at 7:28 a.m. on 1 July 1916 and left a crater 69 ft (21 m) deep and 330 ft (100 m) wide, which was captured and held by British troops. The attack on either flank was defeated by German small arms and artillery fire, except on the extreme right flank and just south of La Boisselle, north of the Lochnagar Crater.
The crater formed during the late Pleistocene, between 13,500 and 18,000 years ago, at which time the Fort Rock basin was a lake and the location was near the shore. Basaltic magma intruding near the surface flashed ground water to steam, which blew out overlying rock and soil, along with some juvenile material.