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Four Craters Lava Field is a basaltic volcanic field located south east of Newberry Caldera in the U.S. state of Oregon. [1] The volcanic field covers about 30 square kilometers and post-dates Mount Mazama's eruption. [3]
The volcano has a pinnacle appearance resembling the spire-like shape of Mount Thielsen. [14] According to Harris (2005), the volcano resembles Cleopatra's Needle from certain angles and the Sugarloaf Mountain in Brazil from others. [5] The proximal relief for the volcano is 2,707 feet (825 m), while the draping relief is 3,363 feet (1,025 m).
Sometime less than 100,000 years ago, magma at Battle Ground Lake in Washington state interacted with water to form the eponymous maar volcano, destroying a lava flow dated to 100,000 years ago. The last volcanic center to form in the field was Beacon Rock, a cinder cone produced by eruptions about 57,000 years ago, which was eroded by the ...
The park encompasses the caldera of Crater Lake, a remnant of Mount Mazama, a destroyed volcano, and the surrounding hills and forests. The lake is 1,949 feet (594 m) deep at its deepest point, [4] which makes it the deepest lake in the United States, the second-deepest in North America and the tenth-deepest in the world. [4]
Notably, forests in the Sand Mountain volcanic field have fewer western red cedar trees than is common among other forests in the Pacific Northwest region. [7] Fen wetlands surround Lost Lake, which is about 3.1 miles (5 km) north–northeast of the field. [16] Within Clear Lake is a submerged forest of Douglas fir trees. [7]
Newberry National Volcanic Monument was designated on November 5, 1990, to protect the area around the Newberry Volcano in the U.S. state of Oregon. [2] The monument was created within the boundaries of the Deschutes National Forest, which is managed by the U.S. Forest Service, and includes 54,822 acres (86 sq mi; 222 km 2) of lakes, lava flows, and geologic features in central Oregon.
Mount Mazama (Klamath: Tum-sum-ne [5]) is a complex volcano in the western U.S. state of Oregon, in a segment of the Cascade Volcanic Arc and Cascade Range.The volcano is in Klamath County, in the southern Cascades, 60 miles (97 km) north of the Oregon–California border.
The Diamond Peak Wilderness in the U.S. state of Oregon is a wilderness area straddling the Cascade crest and includes the Diamond Peak volcano. It is located within two National Forests - the Willamette National Forest on the west and the Deschutes National Forest on the east. [1]