Geology - Pembrokeshire
Fossil Soils - Calcrete
A boulder showing a variety of forms of Calcrete in the Old Red Sandstone at
Freshwater East .
There are extensive exposures of this rock type below the Cliffs on the East side of the Bay .
In a process taking thousands of years , dissolved Calcium Salts are drawn to the surface
by evaporatation , becoming concentrated on soil particles , as the interstitial soil spaces
are filled, an impermeable crust is formed , creating irregular nodules.
Calcretes can also form by a concentration of calcium around plant roots
In Gallery 1.4
Ref: 9716
Date: 12/02/2012
Location: SS 025.961
