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2“Geoworld” Plate Tectonics Lab1.On the map on page 9, highlight the mid-ocean ridge in theElrond Sea and label it the Hobbit 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 magnetic
“Geoworld” Plate Tectonics Lab3polarity 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 are theBilbo and Frodo continents moving away from each other)? Show your equations andexplain 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).
6.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.
4“Geoworld” Plate Tectonics LabRate of formation of Aragorn Ocean crust =__ km/m. y.B. Plate Boundaries1.There are two plate boundaries on the map. You already highlighted one of them inPart 1, A. 1. above. Highlight the other boundary also.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). Divergent boundaries Convergent boundaries Transform boundaries

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