Fossil Fumaroles
Posted by: Groundspeak Premium Member Volcanoguy
N 42° 51.480 W 122° 09.225
10T E 569135 N 4745393
Geologic history sign about the formation of fossil fumaroles along Annie Creek.
Waymark Code: WM7KF2
Location: Oregon, United States
Date Posted: 11/04/2009
Published By:Groundspeak Premium Member silverquill
Views: 4

Marker Name: Fossil Fumaroles
Marker Text: The history of the strange rock formations in front of you began about 7,700 years ago when the eruptions of Mt. Mazama were reaching their climax. Torrents of red-hot, gas-charged pumice poured down Mazama’s slopes at speeds of up to 100 mph (160 kph). On top of this came a flow of heavier rocks called scoria. These glowing avalanches flooded downslope for many miles, leaving deep deposits in their wake.
Temperatures in the deposits may have exceeded 750° F (400° C). Plumes of vapors appeared, as gasses escaped from the settling rocks through vents called fumaroles. Minerals in the gasses, combined with extreme heat, welded the sides of the fumaroles in the shape of slender cones. Since then, Annie Creek has eroded a canyon through the deposits, exposing the fossil fumaroles as pinnacles and columns.
The depth of the canyon here at Godfrey Glen is about 250 feet (75 m).

Historic Topic: Geological

Group Responsible for placement: National Parks Service

Marker Type: Roadside

Region: Willamette Valley

County: Klamath

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

Web link to additional information: Not listed

Visit Instructions:

Include your thoughts and observations pertaining to this location and your visit. Provide any additional history that you are aware of that pertains to this location. If the marker commemorates a historic building tell us what it is used for now or share with us the circumstances of an earlier visit to bring this locations history to life.

Please upload a favorite photograph you took of the waymark. Although visiting this waymark in person is the only thing required of you to receive credit for your visit, taking the time to add this information is greatly appreciated.

Be creative.

Search for... Google Map
Google Maps
Bing Maps
Nearest Waymarks
Nearest Oregon Historical Markers
Nearest Geocaches
Create a scavenger hunt using this waymark as the center point
Recent Visits/Logs:
Date Logged Log User Rating  
OregonTrailRanger visited Fossil Fumaroles 11/27/2020 OregonTrailRanger visited it
Volcanoguy visited Fossil Fumaroles 08/25/2009 Volcanoguy visited it

View all visits/logs