Western Asia the Mediterranean Sea. To the north, the region is delimited from Europe by the Caucasus Mountains, to the southwest, it is delimited from Africa by the Isthmus of Suez, while to the east, the region adjoins Central Asia and South Asia. The Dasht-e Kavir and Dasht-e Lut deserts in eastern Iran naturally delimit the region somewhat from Asia itself. Three major tectonic plates converge on Western Asia, including the African, Eurasian, and Arabian plates. The boundaries between the tectonic plates make up the Azores-Gibraltar Ridge, extending across North Africa, the Red Sea, and into Iran. The Arabian Plate is moving
Geography of Asia to Scythia. The relatively recent study of plate tectonics has discovered that Asia has several regions that would be considered distinct landmasses if strictly geologic and tectonic criteria were used (for example, South Asia and East Asia). Definition of "continental plates" is the realm of geologists. Strictly in terms of geological landmasses or tectonic plates, Europe is a western peninsula of Eurasia and of the Africa-Eurasia landmass. In the latter, Europe and Asia are parts of the Eurasian plate, which excludes the Arabian and Indian tectonic plates. In human geography, there are several schools of thought. The more common school