EESA07H3 Study Guide - Quiz Guide: Mount Everest, Oceanic Crust, Continental Crust
Document Summary
Until 1 ma, the average length of ice ages was about 100,000 years. 24 minutes, and 48 seconds out of 1 hour. The vernal (spring) equinox occurred on march 20th this year. The spring equinox has always occurred on this date. In the last 3 million years there have been about 30 major ice ages and interglacials. The top of mount everest is made of the same 440 million years old limestone found along the niagara. The alpine-himalayan orogeny is a site of active subduction. ________ are fine grained sediments scraped off the oceanic crust as it subducts under continental crust. Active collision of india with asia began ___ years ago. Ophiolites are a common component in obduction zones. During an ice age there is a lower ratio of 18o:16o (relatively less 18o) in the oceans. The "tilt" of the earth"s axis refers to the angle of the earth"s axis relative to the plane of the earth"s orbit.
