OCS 1005 Chapter : Homework 2 OCS
15 Mar 2019
School
Department
Course
Professor
Document Summary
Question 1: locations of hot spots remain fixed for a long time. As plates move across such hot spots, they form chains of volcanoes. The hawaiian islands are an example of such an island chain formed over a hot spot. Volcanoes on the island of hawaii are still active. The age of the extinct volcano, located 4,000 km away from the hawaiian islands, is 40 million years old. To find the rate of movement of the pacific plate firstly, the 4,000 km distance needs to be divided by the time of 40 million years. Question 2: magnetic anomaly stripes run parallel and are symmetrically arranged on both sides of the midocean ridge axis. For example, anomalies b and c on the eastern ridge flank have counterparts b" and c" on the western flank that are the same distance from the crestal anomaly a (see figure). Calculate a spreading rate for the sea floor.
