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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]
The Catlin Gabel tubes lie among cinder cones and lava flows from the Pliocene to Pleistocene, and they are the oldest known lava tubes in Oregon, older than the Holocene. [83] The tubes were produced by a small vent at the southern end of the northern segment of the field, [ 84 ] extending 2.5 miles (4.0 km) from its base to the south and then ...
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.
Mount Scott is a volcanic cinder cone with its summit in Clackamas County, Oregon.The summit rises to an elevation of 1,091 feet (333 m). [1] It is part of the Boring Lava Field, [3] a zone of ancient volcanic activity in the area around Portland, and was named for Harvey W. Scott, a 19th and 20th century editor of The Oregonian newspaper.
Three other cinder cones from this field also lie within the city of Portland: Rocky Butte, Powell Butte, and Kelly Butte. Portland is one of six cities in the United States to have an extinct volcano (Mount Tabor) within its boundaries. Bend is the only other city in Oregon with a volcano within its city limits, with Pilot Butte.
Lava Butte, a cinder cone in Newberry National Volcanic Monument, Oregon. A list of cinder cones is shown below. This list is incomplete; ...
Mount Talbert is a volcanic cinder cone in Clackamas County, Oregon. It is part of the Boring Lava Field , [ 3 ] a zone of ancient volcanic activity in the area around Portland . Its summit rises to an elevation of 740+ ft (230+ m).
Clatsop Butte is an upland butte lying directly south of Powell Butte in southeast Portland, Oregon, United States. Clatsop Butte City Park, which occupies part of the butte, is at coordinates 45°28′28″N 122°30′24″W / 45.47444°N 122.50667°W / 45.47444; -122.50667 at an elevation of 577 feet (176