GEOL107 Chapter Notes - Chapter 18: Echo Sounding, Reflection Seismology, Continental Rise
19 Oct 2018
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Document Summary
Widely accepted theory = began to form by accretion of small, cold chunks of rock and metal that surrounded the sun. As it grew it began to heat up because of heat of collisional impact, gravitational compaction, and radioactive decay of elements such as uranium. Oceans over more than 70% of earth"s surface. Rocks can be broken from the sea floor. An open steel container dragged over the ocean bottom at the end of a cable. Corer a weighted steel pipe dropped vertically into the mud and sand of the ocean floor. Rocks and sediments both can be sampled. Echo sounder measure water depth and draws profiles of submarine topography. Sends out and records a variety of sound sources. Is able to map the seafloor in even more detail. Sidescan sonar measures the intensity of sound reflected back to the tow vehicle from the sea floor.
