Weekly Challenge: Layers

I've posted this photo before but I thought it was a perfect layers subject.  The Painted Hills in central Oregon are named after the colorful layers of its hills corresponding to various geological eras, formed when the area was an ancient river floodplain. Maralee

Painted Hills

Per Wikepedia, Painted Hills is a part of the John Day Fossil Beds, located in Central Oregon.  It is about 75 miles northeast of Bend. They are named after the colorful layers of its hills corresponding to various geological eras, formed when the area was an ancient river floodplain. The black layer is lignite that was vegetative matter …