The examples and perspective in this article deal primarily with the Anglosphere and do not represent a worldwide view of the subject. Please improve this article and discuss the issue on the talk page.(August 2014)
Ferricrete seen in Gulf Coastal Plain deposits
Ferricrete is a hard, erosion-resistant layer of material at the land surface that consists of near surface sediments that have been cemented by iron oxide into 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 the oxidation of percolating solutions of iron salts. The word is derived from the combination of ferruginous and concrete. Synonyms include ferruginousduricrust, hardpan and ironpan.
^Verplanck, Philip L.; et al.; Ferricrete Classification, Morphology, Distribution, and Carbon-14 Age Constraints in Environmental Effects of Historical Mining, Animas River Watershed, Colorado, US Geological Survey, Professional Paper 1651, 2007, p. 726 PDF