Part of The Shear Zone Channel. Granitic melts are commonly proposed to act as weakening mechanisms for deforming continental crust, especially deep in mountain belts. And geologists finding pegmatite, coarse-grained granite sheets, in deformed rocks in outcrops cite these as evidence to support this idea. But many such deductions are misleading... Follow Rob to a spectacular field location on Scotland's north coast, building a counter-argument - in which the intrusion of melts that crystallise pegmatites have only served to strengthen deforming crust.
#granite #geology #NC500
23 июн 2023