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RESOURCES
This NOAA website talks about the first primitive way people measured the depth of the sea floor. It continues by talking about how the first “sonar” was employed to map the sea floor. These original attempts were laborious. In the 1960s the U.S. Navy began using multibeam sonar and after that, the technology gradually improved.
This National Geographic video talks about a NOAA ship that is updating old sea floor maps around St. Thomas. Researchers are combining sonar data with images from ROVs. The scientists allow the sonar to run all night and then will send the ROV to points of interest the next day.
This ArcGIS website defines seafloor geomorphology and what that means. The website continues to describe each feature on the sea floor.
This video shows a crosscut of the ocean. The video explains all of the features in the crosscut of the ocean floor and how the items have formed on the floor through plate tectonics. At the end of the video, the speaker quickly reviews all of the features that were explained.