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What on Earth is Plate Tectonics?

What on Earth is Plate Tectonics?

This abbreviated explanation of the subject of plate tectonics is divided into several parts. The first section, entitled Into the Earth, describes the crust, mantle and core of the Earth, while the next section shows a world map with the plates delineated. The section called Action at the Edges uses text and diagrams to explain what is occurring at the plate boundaries. Links lead to a detailed discussion of converging boundaries including ocean-ocean, ocean-continental, and continental-continental. A wide range illustration shows both surface and cross-section views of plate interaction and a link leads to a similar diagram with labels. In the Moving through Time section, a series of color-coded maps is shown, illustrating the relative position of the continents over the past 650 million years. The last section shows a paleogeographic reconstruction of the Earth and explains how paleomagnetism, magnetic anomalies, paleobiogeography, paleoclimatology, and geologic history are used to create it.


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