OCS 1005 Chapter : OCS ASSGN 2
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. Answer: the pacific plate is moving 0. 0001km a year. Using the formula, speed=distance/time, you take 4000km divided by 40000000 years. Therefore your new formula is 4000/40000000, which equals. Question 2: magnetic anomaly stripes run parallel and are symmetrically arranged on both sides of the mid-ocean 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 crustal anomaly a (see figure). Assume that magnetic anomaly c is 650,000 years old.
