Geology and Minerals

Harrat Rahat

Ḥarrat Rahāṭ (Arabic: حَرَّة رَهَاط) is a volcanic lava field in the Hejazi region of Saudi Arabia. In 1256 CE, a 0.5 km3 (0.12 cu mi) lava flow erupted from six aligned scoria cones, and traveled 23 km (14 miles) to within 4 km (2.5 miles) of the Islamic holy city of Medina; this was its last eruption. There were earlier eruptions, such as in 641 CE, which made finger-like flows to the east of the 1256 CE flow. It is the biggest lava field in Saudi Arabia.. There has been recent increase in seismic activity since 2009.

Also on this shelf

See also

• ▸1969 Santa Barbara oil spill
• ▸California montane chaparral and woodlands
• ▸Concretion

Uncatalogued shelf

Text from Wikipedia; plate via Wikimedia Commons. Text CC BY-SA 4.0; plate freely licensed (see Commons). Source record. Images and catalogue data are reproduced from open-access collections.