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Joseph Faria-PoynterEARTHSS 1Prof. J FergusonOctober 14, 20202020 ESS 1 Discussion 2: Plate boundaries and drawing cross-sections1.There is a mid-ocean ridge marked in red in the middle of the Elrond Sea. Use the magnetic timescale (right of the map) to work out when the Elrond Sea started to form.2.What two pieces of evidence could you look for to support the idea that the Frodo Continent and Bilbo Continent had once been joined together?3.For each of the letters on the map, say whether it is a convergent, divergent or transform boundary, or whether it is not a boundary at all.E = TransformC = Not a BoundaryF = Not a Boundary
4.In the space under the map, draw a cross-section of the Earth along the line from A-A’. Remember to include, and label, the type of crust (continental or ocean), the lithosphere, and asthenosphere.5.Explain:a.Where on the map you would expect shallow earthquakes to occur?At every mid-ocean ridge, trench, and transform boundary. For example: the mid-ocean ridge in the Elrond sea, the transform boundaries in the Aragorn Ocean, and the Sauron Trench. b.Where on the map you would expect deep earthquakes to occur?At trenches like those at the coast of the Galadriel Islands.6.For each volcano location, what type of magma would you expect to occur?a.Galadriel Islands – Andesitic Magmab.Gandalf Islands – Basaltic Magmac.Gollum Islands – Basaltic Magma