Powerful Giant
Posted by: 
Volcanoguy
N 44° 03.629 W 121° 17.002
10T E 637490 N 4880023
New history sign on summit of Pilot Butte, replaces the old “Newberry Volcano” sign.
Waymark Code: WMT0JY
Location: Oregon, United States
Date Posted: 09/03/2016
Views: 1
This sign is located on southern edge of summit observation area.
Marker Name: Powerfull Giant
Marker Text: Newberry Volcano
With lava flows covering 1,200 square miles — the size of present-day Rhode Island — Newberry is the largest volcano in the Cascades. Beginning 400,000 years ago, molten rock, pumice, volcanic gases, and ash roared out of the volcano in a series of gigantic eruptions.
About 75,000 years ago, another massive volcanic explosion created a 17-square-mile volcanic depression called a caldera. In the process, the summit dropped between 500 and 1,000 feet.
The sign contains several photos with additional information in their captions.
PHOTO of Lava Butte - Lava Butte, a 500-foot-high cinder cone, is part of the Newberry system.
PHOTO of hot spring - Newberry is still very much alive. Geothermal wells sizzle at 500°F, and hot springs like this one bubble up along the lakeshore. Newberry erupts every 300 to 3,000 years. The last eruption was 1,300 years ago. (ERROR NOTE: photo is not of a hot spring on Newberry).
PHOTO of Lava River Cave - Lava River Cave is the largest and longest of dozens of lava tubes in Newberry Caldera (ERROR NOTE: the lava tubes are not in Newberry Caldera).
PHOTO of Newberry’s flank - About 400 cinder cone volcanoes perch on Newberry’s flanks as smaller hills and buttes. Each was the source of a separate lava flow that oozed down the sides of Newberry, burying forests and former lava flows in the process.
PHOTO of Pilot Butte - Pilot Butte, also a cinder cone volcano, is surrounded by lava from the massive Newberry flows, and a lava flow from a vent on the north side of Newberry underlies downtown Bend. (NOTE: The same flow surrounds Pilot Butte and underlies downtown Bend.)
PHOTO of Newberry Caldera - Newberry Caldera holds two deep lakes and lava flows of pumice and obsidian. Newberry is now part of the Newberry National Volcanic Monument in the Deschutes National Forest. (ERROR NOTE: Actually Newberry National Volcanic Monument only contains a small part of Newberry Volcano but all of Newberry Caldera.
Poor replacement for the 2006 sign it replaces, see WWABQ - LEGACY - Newberry Volcano.
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