id	keyword
gc-491	sequence
gc-491	karama
gc-491	cretaceous
gc-491	abu
gc-491	tract
gc-491	eocene
gc-491	desert
gc-491	formation
gc-491	bahariya
gc-491	systems
gc-491	egypt
gc-491	refl
gc-491	croatica
gc-491	roash
gc-491	sediments
gc-491	area
gc-491	age
gc-491	ectors
gc-491	limestone
gc-491	shale
gc-491	stratigraphy
gc-491	marine
gc-491	east