Getting a rise out of Yaquina Head
Posted by: Groundspeak Premium Member Volcanoguy
N 44° 40.588 W 124° 04.520
10T E 414771 N 4947573
A geologic history sign about Yaquina Head.
Waymark Code: WMNEF6
Location: Oregon, United States
Date Posted: 02/27/2015
Published By:Groundspeak Premium Member silverquill
Views: 2

Sign is located along the Salal Hill Trail.

Marker Name: Getting a rise out of Yaquina Head
Marker Text: This part of the headland was once as much as 1,000 feet (300 m) lower than it is now.

It’s our fault
Lava formed this headland 14 million years ago. Long afterwards, this end of the headland was thrust upward while the eastern side stayed in place. The joint between these two sides is called a fault.

Breccia and basalt
In the upper quarry, look west (toward the lighthouse and the sea) to see steep walls of breccia exposed by quarrying.
This type of rock, which lies under this side of Salal Hill, was created when lava hit the ocean. A violent mix of boiling water, lava, sand and sediment eventually cooled into breccia.
In Quarry Cove, you can see columns of crystalline basalt on the east side of the fault.

Historic Topic: Geological

Group Responsible for placement: BLM

Marker Type: Trail

Region: Coast

County: Lincoln

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

Web link to additional information: Not listed

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Volcanoguy visited Getting a rise out of Yaquina Head 02/23/2015 Volcanoguy visited it