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The Boring Lava Field (also known as the Boring Volcanic Field) [3] is a Plio-Pleistocene volcanic field with cinder cones, small shield volcanoes, and lava flows in the northern Willamette Valley of the U.S. state of Oregon and adjacent southwest Washington.
J.E. Allen, an emeritus professor of Geology at Portland State University, listed its elevation as 560 feet (170 m) in a 1975 publication. [3] Powell Butte is a cinder cone butte [4] and is part of the Plio-Pleistocene Boring Lava Field, [4] a group of volcanic cones that got their name from the low, forested Boring Hills formation. [5]
Rocky Butte (previously known as Mowich Illahee [4] and Wiberg Butte) is an extinct cinder cone butte in Portland, Oregon, United States. It is also part of the Boring Lava Field, a group of volcanic vents and lava flows throughout Oregon and Washington state. The volcano erupted between 285,000 and 500,000 years ago.
Lava Butte, a cinder cone in Newberry National Volcanic Monument, Oregon. A list of cinder cones is shown below. This list is incomplete; ...
The other examples are Mount Tabor in Portland, Oregon, Jackson Volcano in Jackson, Mississippi, Diamond Head in Honolulu, Glassford Hill in Prescott Valley and Pilot Knob in Austin, Texas. The 114.22-acre (46.22-hectare) Pilot Butte State Scenic Viewpoint, presented as a gift to the State of Oregon in 1928, is a Bend icon. Pilot Butte itself ...
The area has many rhyolitic domes, such as Melvin Butte, plus andesitic cinder cones, including those of the Triangle Hill and Triangle Peak area, whose composition is similar to the Tumalo Tuff (and Bend Pumice), and Shevlin Park Tuff. [2] This area has andesitic and mafic cinder cones, such as Lava Butte. [3] and rhyolite domes. [4]
There is a chain of Pleistocene cinder cones east of the butte that trends from northwest to southeast, with other Pleistocene cinder cones located to the south. [4] There is also a mafic, well-preserved cinder cone above the Green Ridge fault zone, which produced a Pleistocene lava flow. [14]
Hoodoo Butte lies in Linn County, in the northern part of the U.S. state of Oregon. [1] With an elevation of 5,597 feet (1,706 m), [1] it has a large, rounded shape, [2] rising about 500 feet (150 m) above the surrounding platform. [3] The volcano lies 44 miles (71 km) northwest of the city of Bend and about 130 miles (210 km) southeast of ...