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Excerpt from Results of Spirit Leveling in Texas, 1896 to 1910, InclusiveDatum.-all United States Geological Survey elevations are re ferred 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 low est tides, nor is it the half sum

Title : Results of Spirit Leveling in Texas, 1896 to 1910, Inclusive (Classic Reprint)
Author : R.B. Marshall
Language : en
Rating :
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Type : PDF, ePub, Kindle
Uploaded : Apr 11, 2021

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