Date Ideas 28/5/14 - Painted Hills, Oregon

The painted hills in Oregon (44.660347, -120.253160) are, apparently, volcanic (pyroclastic?) flows. Different chemical compositions result in weathered profiles which give the beds a painted look. I suspect the red is cinders / scoria? Some beautiful photographs come out of this area but I have to wonder what the saturation levels are on the images. Best to find out for ourselves huh?

Lovely image from here, an Oregon visitor information post.  

Photographed by Doug Dolde at the John Day Fossil Beds in Oregon (on wikimedia).