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27. Relative Chronology
27. Relative Chronology

The ages of martian terrain units relative to each other and to the period of heavy bombardment can be determined based on size vs. frequency plots of impact craters, resulting in relative chronologies. This map shows the age distribution of martian geologic units, ranging from oldest (heavy bombardment) to youngest (post heavy bombardment).

From the Ph.D thesis of N. G. Barlow, University of Arizona, 1987

Right click here to download a high-resolution version of the image (7.18 MB)



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