The Sumerians lived in Mesopotamia around 4000 BC. Mesopotamia or the Fertile Crescent was a region in the Middle East between the Tigris and Euphrates rivers, in the territory of modern Iraq, Iran and Syria.
While nearly all the archipelago is part of Alaska and is usually considered as being in the  Alaskan Bush , at the extreme western end, the small, geologically related Commander Islands belong to Russia.The islands, with their 57 volcanoes, are in the northern part of the Pacific Ring of Fire.Physiographically, they are a distinct section of the larger Pacific Border province, which in turn is part of the larger Pacific Mountain System physiographic division.hile nearly all the archipelago is part of Alaska and is usually considered as being in the  Alaskan Bush , at the extreme western end, the small, geologically related Commander Islands belong to Russia.
Hot, remelted material from the subducting slab rises and leaks into the crust, forming a series of volcanoes. These volcanoes can make a chain of islands called an island arc. Examples of island arcs are the Japanese islands, the Kuril Islands, and the Aleutian Islands of Alaska, shown here.Island Arcs are formed on the opposing edge of a subducted slab. For each case, there is an associated subducting slab and a trench.The trenches for these island arcs can barely be made out in this map..) The second way in which islands are formed is via plumes or hot spots in the lithosphere. The Hawaiian Islands are an example of this type of island formation. In this case, there is no associated subducting slab.