SINCLAIR STAMMERS / SCIENCE PHOTO LIBRARY SINCLAIR STAMMERS / SCIENCE PHOTO LIBRARY
Eroded limestone cliffs at a coast. Limestone is a carbonate sedimentary rock formed by deposition and compression of the shells of marine animals. It is susceptible not only to the usual erosive power of the sea, but also to karst-type erosion. This leaves surfaces with deep channels separating ridges. In this case, pools of seawater dissolve pits in the limestone, which get deeper as new seawater is thrown into them, which can dissolve more limestone. Photographed at Cabo Carvoeiro, Portugal.
Model release not required. Property release not required.