BIOL 412 Lecture Notes - Lecture 15: San Andreas Fault, Arabian Plate, Pacific Plate
Document Summary
Talked about the development of continental drift theory. Thesis statement: can be a one sentence description of what the paper will be about: this paper, i will be discussing the biogeography of great basin. Introduction will cover this, this and this then will lead to question. Sonar and soundings mapped the ocean floor measure the depth of ocean. Showed that ocean floor produced by spreading was composed of young basalt dating to jurassic: different ages, oceanic trenches are swallowing crust. Sw carey used plasticine shapes of landmasses sliding over a glove to support continental drift. Bullard et al used computer mapping and stats that show that continents fit together. Now have better knowledge of what"s going on. Current model of plate tectonics: centre- solid core, outer core liquid mantle, crust continental (dense) and oceanic (buoyant) crust. They have distinct characteristics: mid-ocean ridge and subduction zone.
