2 geoworld plate tectonics lab 1 on the map on page 9

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2“Geoworld” Plate Tectonics Lab1.On the map on page 9, highlight the mid-ocean ridge in the Elrond Sea and label it theHobbit Ridge. 2.The pattern of positive and negative magnetic anomalies in the Elrond Sea can becorrelated with the pattern of normal and reversed magnetism on the magneticpolarity time scale. Based on this correlation, how many million years (m.y.) ago didsea floor spreading begin in the Elrond Sea?
3.Using the magnetic anomaly pattern in the Elrond sea, determine the 1/2-spreadingrate (plate velocities) on the Hobbit Ridge (i.e., determine how fast the Frodo continentis moving away from the Hobbit ridge). Give your answer in km/m. y.(kilometers/million years). Show your equations and explain where each number camefrom.
4.What is the full spreading rate (in km/mya) of the Hobbit Ridge? (i.e., how fast arethe Bilbo and Frodo continents moving away from each other)? Show your equationsand explain where each number came from.
5.Using the magnetic anomaly patterns in the Aragorn Ocean, determine when sea floorspreading started to form the Aragorn Ocean crust (remember, spreading is notactively going on now but it was at one time).
“Geoworld” Plate Tectonics Lab3Spreading Started __ m.y. ago6.At the time that active sea-floor spreading was occuring in the Aragorn Ocean, atwhat rate was new sea-floor being created? (Think: is this related to the fullspreading rate or the half spreading rate)? Show your equations and explain whereeach number came from.
2.Give one example of each of the following types of plate boundaries on Geoworld(Note: the boundary between two plates can vary in type from place to place).
3.How many lithospheric plates are there in all?C. Cross-SectionMake a schematic cross-section of Geoworld along A-A'. Draw it in the box providedat the bottom of the map on page 9. Show the entire thickness of the lithosphere and partof the asthenosphere. Label the crust, mantle lithosphere and asthenosphere.D. Transform FaultsThere are several transform faults in the Elrond Sea. The only parts of these faults that arepresently activeare the parts between the segments of the Hobbit Ridge. 1.Using arrows, show the sense of motion on each of the active transform faults on themap.
4“Geoworld” Plate Tectonics LabE. Earthquakes

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