Petroleum geology The Arab-D unit of the Riyadh Group makes up one of the largest in the world | Many narrow valleys run along its sides, such as , and a group of towns lie on its central section, including the capital, |
---|---|
Bureau and Saudi researchers conducted a high-resolution LIDAR survey of Middle Jurassic outcrops of the Tuwaiq Mountain limestone along the Tuwaiq Mountain Escarpment near the city of , | The Tweig escarpment is mentioned in 's 13th century geographical encyclopedia under the name "Al-'Aridh", though for the past few centuries that name has applied only to the central section of it, around Riyadh |
The hikers climbed around 25km | The eastern side slopes downwards gradually, while the western side ends in an abrupt manner |
---|---|
used the name "Tuwayr Mountains" to describe mountains of central Arabia, distinct from the in the north, the in the south, and to the east | The escarpment can be thought of as a narrow plateau, though the locals refer to it as a jebel "mount" |
The capital lies just beyond the horizon.