Abstract
THE study of recent sediments has yielded important data bearing on the extent and conditions of deposition in ancient seas, but the collection of similar data relating to the ancient continents is more difficult. However, one may find in marine deposits some indirect evidence of the constitution of the neighbouring continents. The effect of the proximity of deserts on the composition of recent marine deposits does not appear to have been studied. With a view to collecting data bearing on this particular point, I have made an examination of the deposits of the Red Sea.

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