o	From the standpoint of sources, the volcaniclasts of Wadi Qabil, are comprised of highly fragmented materials containing juvenile products of explosive eruptions and fragments of materials plucked from the walls of the vent.o	At Pyroclastic Exposure, NW of Gharyan Dome ;	A disaggregated block (~ 20 x 15 cm) of older country rock (Al Aziziyah carbonates) plucked from shallow level phreatomagmatic eruption is detected constraining the shallow depth over which the fragmentation occurred (Fig.o	The blocks generally consist of unvesiculted angular fragments of basalt, rounded to rectangular sandstone as well as limestone of known crustal rock types derived from underlying strata (Abu Shaybah sandstone, Al Aziziyah carbonates and phonolites. 15).