Layer upon layer of sandstone, siltstone and clay is what makes up the Tepees in the Petrified Forest National Park in Arizona, USA.
While the white layers are sandstone, the dark layers have been shaded by high concentrations of carbon. The bands of dark red are layers of siltstone which have been stained by iron, whereas the base is tinged red by iron oxide. The grey cap of the tepees is made from clay.
The Tepees, Petrified Forest National Park, Arizona, USA
I photographed this photo with the digital SLR camera model Canon EOS-1Ds Mark III, aperture of f/16.0, exposure time of 1/25 sec. on ISO 100, as always I used a original Canon Lens, the focus lenght for this picture was 200mm.
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