Tuesday, September 22, 2015

Drunk on Geology - Obsidian Stout

The next up in our Drunk on Geology series is Obsidian Stout from Deschutes Brewery out of Bend, OR.

Obsidian is a shiny, very smooth, and (often) black igneous rock. It forms from the extremely quick cooling of lava, where no crystals have time to grow. This creates a glassy structure, where edges are able to sharpened to be sharper than a razor blade. Obsidian is found in areas of former or active volcanism, much like along the Northwestern US with the active Cascade Range volcanoes (where Bend, OR is located). Surrounding Bend, there is also the Lava Lands Visitor Center and the Newberry National Volcanic Monument

Some actual obsidian.

Obsidian Stout

"Deep, robust and richly rewarding, roasted malt and black barley give way to notes of chocolate and espresso. Smooth and black as the glassy volcanic rock fields it's names for."

 "Give in to the deep, dark spell as the layers unfold."

Some lovely obsidian layers courtesy of  Lockwood (Outside the Interzone)

Glamour shot


  1. "Give in to the deep, dark spell as the layers unfold." http://outsidetheinterzone.blogspot.com/2013/06/geo-365-june-6-day-157-squiggle.html (Big Obsidian Flow, in Newberry Caldera, south of Bend. Feel free to insert this photo, if you'd like.)

    1. Thanks Lockwood, I took you up on your offer. Great Obsidian layers!


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