EARTHSC 1100 Lecture Notes - Lecture 13: Magnetic Anomaly Detector, Cosmic Microwave Background, Continental Crust
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He"s thinking march 8th will be the exam (more on this later) Take the sculptearth reading quiz by the 23rd! Sonar data from wwii ships tracking submarines, etc. Stripes of magnetic rock alternating positive to negative on either side of the mid-ocean ridge. Magnetite is a magnetic mineral that point in a speci c direction. Mid-ocean ridge is caused by south american and african plates pulling away from each other at the same rate. Continental crust is the same distance on both sides of the ridge. Magma/hot material is coming up between the plates and going to the left and right sides, creating the underwater mountain range. These were surprising because they were not randomly distributed but rather were limited to: In 1960, harry hess published his essay in geopoetry . High heat ow from molten rock rises into the cracked crust. As molten rock rises it cools (remember geothermal gradient) and hardens into solid rock.