Cabezo Castildetierra, Spain

September 22, 2015

Cabezo Castildetierra 1

Photographer: Mariano Lastra
Summary Author: Mariano Lastra

During the Tertiary, the northwestern Iberian Peninsula was an extensive plain enclosing wetlands and lakes without opening to the Paratethys Sea. Over millions of years, rivers flooding into the basin created deposits of up to 13,000 ft (4,000 m) of fine sediments, mostly clays. Once this basin opened to the sea 10 million years ago, irregular erosion shaped the landscape. Soft sandstones and clays eroded rapidly while limestone and other hard carbonated rocks remain. This area of wild beauty and semi-desert landscape is now the Bardenas Reales Natural Park, declared a Biosphere Reserve by UNESCO, covering 105 acres (42.5 hectares). Where pieces of hard substrate stay over, sediments underneath persist, forming what locals call Cabezos (similar to hoodoos). The photo above shows the emblematic formation of the Natural Park, the Castildetierra cabezo, as it's presented by the author's daughter. Photo taken August 19, 2015.

Photo Details: Camera Maker: SONY; Camera Model: DSLR-A350; Lens: Minolta/Sony AF DT 18-70mm F3.5-5.6 (D); Focal Length: 18mm (35mm equivalent: 27mm); Aperture: ƒ/10.0; Exposure Time: 0.013 s (1/80); ISO equiv: 100.