A volcano-sedimentary succession, including the Guruf volcanic series, is exposed at Gabal Um in north Eastern Desert of Egypt. series intermediate to silicic flows and associated pyroclastic deposits unconformably overlie quartz-diorite granodiorite plutons are intruded by high-level alkali feldspar granites. The metavolcanic xenoliths shown be unrelated volcanics. Two cycles can recognized. l...