Northwest Rift Zone
Posted by: Groundspeak Premium Member Volcanoguy
N 43° 54.982 W 121° 21.384
10T E 631959 N 4863896
A geologic history sign about the Northwest Rift Zone.
Waymark Code: WMN3NE
Location: Oregon, United States
Date Posted: 12/20/2014
Published By:Groundspeak Regular Member silverquill
Views: 1

Sign is located along the Crater Rim Trail at Lava Butte.

Marker Name: Northwest Rift Zone
Marker Text: Lava Butte is one of many cinder cones that erupted about 7,000 years ago from a northwest-trending fissure (crack) system known as the Northwest Rift Zone. The fissures extend nearly 17 miles from East Lake in Newberry Caldera to the northwest of Lava Butte. These fissures have created a zone of weakness where molten rock (magma) surfaced in several short eruptive episodes.

When you look across the landscape from here, notice the dark-colored, barren areas between Lava Butte and the rim of Newberry Volcano; these are the Northwest Rift Zone lava flows.

Historic Topic: Geological

Group Responsible for placement: Forest Service

Marker Type: Trail

Region: Central Oregon

County: Deschutes

State of Oregon Historical Marker "Beaver Board": Not listed

Web link to additional information: Not listed

Visit Instructions:

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Recent Visits/Logs:
Date Logged Log User Rating  
Volcanoguy visited Northwest Rift Zone 05/13/2014 Volcanoguy visited it