Ad-Dahna Desert passages which can be several kilometers long. Local Bedouin have always known these caves and some were used as water supplies. They were first systematically studied in the 1981, and later explored and reported by the Saudi Geological Survey. Ad-Dahna Desert The ad-Dahna Desert is the central division of the Arabian Desert. It is a corridor of sandy terrain forming a bow-like shape that connects an-Nafud desert in the north to Rub' al-Khali desert in the south. Its length is more than 1,000 km siding Twaik Mountains from the east and does not exceed 80 km in width. It is
The Oregon Desert The Oregon Desert The Oregon Desert is a non-fiction book about the high desert region of eastern Oregon. It highlights both the people and natural history of Oregon's high desert country using serious science, first-hand narrative history, and humorous anecdotal stories. It was written by E. R. Jackman and R. A. Long. The book was first published in 1964 and has never been out of print since its initial release. Edwin Russell (E.R.) Jackman was an American agricultural expert from Oregon. He worked for Oregon State University as a rural extension agent and a farm crop specialist from 1929 until