Inflated Lavas
Posted by: Groundspeak Premium Member Volcanoguy
N 44° 00.835 W 121° 44.299
10T E 601130 N 4874192
A geologic history sign about the lavas from Mt. Bachelor.
Waymark Code: WMN6WH
Location: Oregon, United States
Date Posted: 01/06/2015
Published By:Groundspeak Regular Member ddtfamily
Views: 3

Sign is located at the Sparks Lake boat ramp.

Marker Name: Inflated Lavas
Marker Text: These vertical lava rock outcrops were created through a geological process known as “inflation.”

When lava from Mt. Bachelor spread over relatively flat ground, the surface cooled and hardened to rock. The horizontal movement of the lava flow stopped but the hot lava within the flow was forced to expand vertically like a giant loaf of leaven bread.

The lava flow inflated as high as 70 feet in some places.

Historic Topic: Geological

Group Responsible for placement: Forest Service

Marker Type: Roadside

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 Inflated Lavas 11/08/2014 Volcanoguy visited it