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First published in 1980, this book shows the positions of the major
continental areas during the past 560 million years as four series
of computer-drawn maps. The maps have been drawn for the present
day, 10 and 20 million years ago, then at 20-million-year intervals
back to 240 million years, and finally at 40-million-year intervals
to 560 million years ago. All the maps are based on quantitative
geophysical or topographic information: paleomagnetic pole
positions, ocean floor magnetic anomalies, and best fits of the
continental margins. Cylindrical equidistant and Lambert equal-area
polar projections are used, with a thirty-degree latitude-longitude
grid. Many interesting problems in the Earth Sciences are global.
These maps provide a framework on which a wide variety of data may
be plotted. Problems in fields as widely separated as
palenontology, stratigraphy, geochemistry and tectonics may
usefully be displayed on these maps.
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