The Mariana Trench is the deepest part in the world's oceans. It is located in the Pacific Ocean and has a depth of -36,069'. It form the boundary between two tectonic plates, the Pacific Plate, and the Mariana Plate. The western edge of the Pacific Plate is subducted under the Mariana plate. The movement of these two plates is indirectly responsible for the formation of the Mariana islands, volcanic islands caused by flux melting.
During the 1960's the disclosure of enormous gas and oil fields in Alaska accelerated the change of most coal framework to other petroleum products. During this period Usibelli Coal Mine bought the Suntrana mine and the mining activities in the Matanuska coal fields stopped activity.
Index fossils, intrustions and cross-cutting relationships.
Explanation:
The correct list of three different geologic features that help scientists determine the relative ages of rocks by their position is "index fossils, intrusions, and cross-cutting relationships".
