1) Sedimentary rock
Found on
https://www.crosswordclues.com/clue/ferricrete
Ferricrete is a hard, erosion-resistant layer of material at the land surface that consists of near surface sediments cemented by iron oxide in to a duricrust. Ferricretes contains sediments and other non-indigenous materials, which have been transported from outside the immediate area in which it occurs. The iron oxide cements are derived from th...
Found on
http://en.wikipedia.org/wiki/Ferricrete
iron-rich duricrust, an indurated, or hardened, layer in or on a soil. Soil particles are cemented together by iron oxides (such as Fe2O3) ...
Found on
http://www.britannica.com/eb/a-z/f/19
No exact match found.
