The calcium carbonate content of 73 beach and 9 wind-blown sands was estimated by means of leaching with hydrochloric acid. The results of these analyses are tabulated and it is pointed out that north of northern North Carolina calcareous beach sands are the exception, while south of this point they are the rule. A striking difference in respect to carbonate content between sands collected on the ocean and on the sound side of sand bars is also noted.

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