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.
Deep ocean trench and island chain called an âisland arcâ Example: Japan, and the Aleutian Islands in Alaska Oceanic vs. Continental Convergent Boundaries What happens: An oceanic and a continental plate collide (converge). The denser and thinner oceanic plate is forced down into the Earthâs mantle (by the process of subduction) Why does this happen? The oceanic plate is denser, so it will sink below and melt. What physical feature(s) are formed? Deep ocean trench and island volcanic inland mountain chains Example: Juan de Fuca oceanic plate colliding with the North American Plate created the Cascade Mountain Range in the western U.S. The Andes Mountains are another example. Continental vs. Continental Convergent Boundaries What happens: Two thick continental plates collide. The plates do not subduct. They crumple, fold, fault, and create mountain chains. Why does this happen?