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Excerpt from Results of Spirit Leveling in North Dakota, 1897 to 1910, InclusiveDatum - All United States Geological Survey elevations are referred to mean sea level, which is the level that the sea would assume if the influence of Winds and tides were eliminated. This level is not the elevation determined from the mean of the highest and the lowest tides, nor is it the

Title : Results of Spirit Leveling in North Dakota, 1897 to 1910, Inclusive (Classic Reprint)
Author : R.B. Marshall
Language : en
Rating :
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Type : PDF, ePub, Kindle
Uploaded : Apr 06, 2021

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