Natural History Photographs


The rock cycle
Deposition


Dunes are formed by deposition of airborne sand; wind causes sand to be airborne to start with. Dunes are thus aeolic sediments. Karataş (Adana), Turkey; 14 June 2011.



Calcium carbonate forms when saturated water is slowly flowing over a bedrock.



Massive deposition of volcanic ash, compacted to pumice and tuff. Wingertsbergwand (Eifel), Germany; 15 July 2013.



Ripple patterns at a Devonian beach.
Florzé, Belgium; 11 June 2013.
Ripple patterns at the beach. Texel, the Netherlands; 1 October 2011.