Calcium carbonate accumulation in deep strata and calcrete in Quaternary alluvial formations of Morocco

摘要

Morphological studies on various scales of calcium carbonate accumulation which cements the Quaternary alluvial formations of the Sebou and the Moulouya (Morocco), show that there are two types of accumulation. The first, a thin layer always found near the surface, appears to be derived from the local redistribution of calcium carbonate under the influence of pedogenetical phenomena. The second, found in deeper strata, is a homogeneous thicker layer. It develops below the water table, after a long displacement of calcium carbonate in solution. These cemented layers affect the evolution of landscapes