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In this activity, students are given a series of world maps showing the different configurations of the continents through geologic history. Working back from the present, students reconstruct the location of past surface currents based on the location of the continents and global atmospheric circulation patterns. Students also need to consider the importance of oceanic gyres in global heat transport by identifying warm and cold currents, as well as, areas that in the past were isolated from hemisphere-scale gyres and as a result, experienced unusually cold or warm conditions.
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