Fields covered with basalt (Aharat) deployed to the Arabian Shield kingdom approximately 000.90 square kilometers and spread out hundreds of volcanic cones and the most important of these Aharat:
1. Free Rahat: The old Bahra know Bani Salim, one of the largest Aharat Arabian Shield, with an area of 000.20 km 2.
2. Free Free: Located 40 km north of Jeddah, and extends for a distance of 20 km in the alignment of the west side of the road Usfaan - grandfather.
3. Nuaimiya free: Located 80 km north-east of the city of Jeddah.
4. Mahesenah free: Located 100 kilometers northeast of the city of Jeddah to the south of the city Usfaan.
5. Khb free: Free This center is located 280 kilometers north-east of the city of Jeddah.
6. Htim free: Free This center is located about 180 kilometers northwest of the city of Buraidah.
7. Free ponds: These free center is located about 180 kilometers northwest of the city of Jizan.
8. Hubaysh free (for Onner): Located at the center of this free after about 40 km to the east of the city Trowel.
9. Free Free: Free This center is located about 250 kilometers northwest of the city of Sakaka.
10. Sharm Al Khor free: free this center is located 60 km northwest of the city of Yanbu.
11. Khyber free: Free This center is located 200 km north-east of Medina.
12. Noasif free: Free This center is located 180 km east of the city of Taif.
13. Bakom free: Free This center is located about 170 kilometers southeast of the city of Taif.
14. Free lap: These free center is located 120 km north-east of the city of Taif.
التسميات
Copper and Basalt