The boys, Nico and I headed south of Bend about 20 miles to Newberry National Volcanic Monument. The area called the Big Obsidian Flow formed about 1,300 years ago.
The Obsidian rock has a shiny, often sharp, black glass look to it and is formed from a certain type of volcanic flow that is formed in the west. 
Occasionally, when the lava is cooling, air will get trapped in layers of pumice and crystal.
Another highlight of the area is Paulina Falls. 
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