EESA06H3 Chapter 1-6: EESA06 Textbook Notes
Document Summary
Plate tectonics earth"s surface is divided into a few large, thick plates that move slowly and change in size. Continental drift continents move freely over the earth"s surface, changing positions relative to one another. Paleoclimatology the study of ancient climates. Wegener studied climates, rocks and fossil, magnetic poles supported the continental drift. Multibeam sonar measures water depth and draws profiles of submarine topography. Sidescan sonar measures the intensity of sound reflected from the ocean floor and provides detailed images and information about sediments and bedforms on the sea floor. Sub-bottom profilers - examine the strata (layers) beneath the floor of the lake/ocean. Seismic reflection profiler louder noise, lower frequency, reflects from layers within sediment and rock, records water depth and reveals internal structure of sea floor (ex: faults, folds) Rock dredge an open steel container dragged over the ocean bottom. Rock corer steel pipe dropped vertically into mud and sand of ocean floor.
