The Arabian Shield region extends along the Red Sea coast and the Gulf of Aqaba in the Kingdom of Saudi Arabia , from Jordan in the north to the Saudi-Yemeni border in the south. It spans the provinces of Tabuk , al-Madinah al-Munawwarah , Makkah al-Mukarramah , al-Bahah , Aseer , and Jazan . The Arabian Shield covers an area of 630,000 km 2 , representing 32 percent of the Kingdom's land area. Its width ranges from fifty to one hundred km in the north, expands in the center to reach a max...