Wallowa Mountains Fault

February 13, 2015


Photographer: Marli Miller
Summary Authors: Marli Miller; Jackie Phillips February 2015 Viewer's Choice

While flying home to Oregon this year, I was treated to some incredible views out my window. The photo above shows the frontal fault zone of the Wallowa Mountains of northeastern Oregon.
Although you can't distinguish between different rocks in this photo, the mountains consist mostly of a Jurassic-Cretaceous granitic stitching pluton that intrudes accreted rock of the Wallowa Terrane

AX2x2x2x2x2bundant evidence for glaciation can be seen as well, as evidenced by the U-shaped valleys, cirques and aretes. Wallowa Lake, in the northeast (upper right), is hemmed in by a glacial moraine consisting largely of granite boulders, as shown in the second photo. Photos taken on January 1, 2015 (top) and June 25, 2010.

Photo details: Camera Model: Canon EOS 5D Mark II; Lens: EF24-105mm f/4L IS USM; Focal Length: 45mm; Aperture: ƒ/8.0; Exposure Time: 0.0025 s (1/400); ISO equiv: 125; Software: Adobe Photoshop CS6 (Macintosh).