Geographical features: Jidda / Dyke (Dike)
Originally posted on February 7, 2015 The whole southern tip of the Sinai Peninsula is a mountainous area, while the High Mountain Region proper, sometimes called the Central High Mountains, is the area in the middle around the town of St. Katherine. (See Google Earth screenshots below.) Up to 80% of the massif is granite of different types formed as far back as 600 million years, but there are also mountains that are made of newer, about 10 million year-old black volcanic rock. Sandstone and limestone are found north of the mountainous tip, forming surrealistic rock formations, sandy plains and eroded layered plateaus. In the mountainous area red granite and black volcanic mountains are often found together, as we can see with the Jebel Safsafa-Mt. Sinai, the Jebel Raba-Jebel Ahmar-Mt. Katharina or the Jebel Abu Mahashur-Jebel Abbas Basha ranges. In each case much of the mass of the mountains is made of hard and smooth red granite, but the famous peaks are actually softer crumbling bl...