What principles would I need to use to determine the relative age of an area on the surface of Mars?
What would the effect from cosmic-ray radiation have on an astronaut?© BrainMass Inc. brainmass.com October 9, 2019, 5:38 pm ad1c9bdddf
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The relative age of the surface area on Mars are determined. The effects from cosmic-rat radiation on an astronaut are examined.