Information: - Harrat Kishb is a 5,892km lava field in western Saudi Arabia. Nearby is the Al Wahbah Crater. - A lava field, also called a lava plain or lava bed, is a large expanse of nearly flat-lying lava flows. Such features are generally composed of highly fluid basalt lava, and can extend for tens or even hundreds of miles across the underlying terrain. The extent of large lava fields is most readily grasped from the air or in satellite photos, where their typically dark, nearly black color contrasts sharply with the rest of the landscape. According to the US Geological Survey, monogenetic volcanic fields are collections of cinder cones, and/or Maar vents and associated lava flows and pyroclastic deposits. Sometimes a stratovolcano is at the center of the field, as at the San Francisco Volcanic Field in Arizona. Monogenetic volcano fields have systematic growth patterns that suggest they represent single magmatic systems in the same way that stratovolcanoes do, but monogenetic volcanoes grow laterally rather than vertically (Wood and Shoan, 1984). Detailed mapping indicates that some cinder cones in monogenetic fields (e.g., Cima, California, and Timber Mountain Volcanic Field, Nevada) may have had multiple eruptions separated by tens to hundreds of thousands of years (Wells, et al., 1989). Thus, some monogenetic cones may actually be polygenetic. This possibility differs from observations of historic eruptions (Wood, 1979), and is physically difficult to understand because cinder cone conduits are narrow and must solidify within a few years of eruption. Nonetheless, such multiple eruptions appear to have happened at least twice: Other cinder cones need to be closely reexamined. - Saudi Arabia, officially known as the Kingdom of Saudi Arabia (KSA), is an Arab sovereign state in Western Asia constituting the bulk of the Arabian Peninsula. With a land area of approximately , Saudi Arabia is geographically the fifth-largest state in Asia and second-largest state in the Arab world after Algeria. Saudi Arabia is bordered by Jordan and Iraq to the north, Kuwait to the northeast, Qatar, Bahrain, and the United Arab Emirates to the east, Oman to the southeast, and Yemen to the south. It is separated from Israel and Egypt by the Gulf of Aqaba. It is the only nation with both a Red Sea coast and a Persian Gulf coast, and most of its terrain consists of arid desert or barren landforms. - The Al Waba crater ( Maqla Tamia in Arabic ) is 254 km from Taif on the western edge of the Harrat Kishb basalt plateau , which contains many volcanic cones . It is 250 m ( 820 ft ) deep and 2 km ( 1.2 mi ) in diameter . The bottom of the crater is covered with white sodium phosphate crystals . While it was thought for some time that the crater was formed by a meteorite , as its appearance resembles that of the Barringer Crater , with its circular form and high sides , it is now commonly accepted by geologists that the crater is a maar crater , and was formed by volcanic activity in the form of an underground phreatic eruption - a massive steam explosion generated by molten basaltic magma coming into contact with subterranean water . The remains of date palm plantations can be found halfway down the side of the crater , but they are disused . There are springs near the plantations . It 's easy to climb down from the rim to the bottom of the crater there from the North side on a prepared path , although most of the circumference has steep , unclimbable cliffs . At the top of the path is a stone hut which contains rubbish and debris , and some suitable places for camping , although there are better places to camp to the South ( see below ) . In the north of the Waba Crater , there is some vegetation located . It takes a person 15 -- 25 minutes to go to the bottom of the crater . This crater is very slippery and it is hard for people to come up to the surface . To climb back up takes approx 20 -- 40 minutes . There is only one paved route down into the crater . It is not recommended to climb down in groups of less than 3 , as the path is quite loose in places and the risk of accident , whilst not huge , is ever present . Furthermore there is no mobile signal within the crater , and the site receives very few visitors indeed , even over weekends . The best camping sites at the crater are on the south side just above the palm trees , which afford excellent views and where the ground is flat and secluded . Since... What is the relationship between 'al wahbah crater' and 'saudi arabia'?
Answer:
country