Syrabia, to use Krenkel's comprehensive term for the great region comprising Arabia, Syria, Palestine, and Sinai, has been the theatre of vast igneous activity from the Cretaceous to the present time. M. Blanckenhorn divides the igneous rocks of this region into two groups, according to age, as Cretaceous-Eocene and Neogene-Quaternary. The Cretaceous-Eocene group includes gabbro-serpentine-diabase intrusives and extrusives involved with, and restricted to, the Eurasian fold-mountain system in the northern part of the region, and also prevailingly basaltic eruptives occurring in the Syrabian plateau country.