The Hajar Mountains
The Hajar Mountains parallel the east coast of the UAE. At their highest
point in the north, in the Musandam Peninsula, they reach a height of
2000 metres. There the mountain slopes drop directly into the sea. This
area is known locally as the Ru'us Al-Jibal , literally the 'heads of
the mountains.' The Ru'us Al-Jibal exposes the thick sequence of Mesozoic
carbonates of the Arabian Platform which correlates with the principal
oil bearing strata that lie deeply buried to the west.
To the south of the Ru'us Al-Jibal the Hajar Mountains consist of a complex
of igneous and sedimentary rocks which represent the upper mantle, oceanic
crust and deep ocean sediments of the ocean that once lay to the north-east.
The igneous rocks of the mantle and oceanic crust are collectively called
ophiolites . The ophiolites of the UAE now lie above the rocks of the
Arabian Platform The Hajar Mountains constitute the world's most extensive
surface exposure of ophiolites. For this reason they are of tremendous
interest to geologists.