sandstone turns into quartzite under heat and pressure.
sandstone turns into quartzite under heat and pressure.
what does sandstone turn into under heat and pressure?
quartzite
many morphological formations in the rocky landscape of the elbe sandstone mountains are suspected to have been formed as a consequence of karstification. important indicators of such processes in the polygenetic and polymorphic erosion landscape of the elbe sandstone mountains are the furrows with parallel ridges between them (grykes and clints) that look like cart ruts and which are particularly common, as well as extensive cave systems. they are occasionally described by the term pseudokarst. the application of the concept to several erosion formations in the sandstone of this mountain range is however contentious. czech geologists have identified in quartzite-cemented sandstone areas in the northern part of the bohemian cretaceous basin, karst features in the shape of spherical caverns and cave formations. according to them, these emerged as a result of solution processes by water in complex interactions with iron compounds from neighbouring or intrusive magmatic-volcanic rocks. the variation in relief in these sandstone regions is explained on the basis of these processes. the elbe sandstone mountains are the greatest cretaceous sandstone erosion complex in europe.
elbe sandstone mountains
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