. The Earth beneath the sea : History. Ocean bottom; Marine geophysics. 250 mgal 200 150 - 100 50 -50. -\ 0 I T^TTTTTiTnTTTTTrTTTlTm j_ 2 3 4 5 km 50 100 150 km Fig. 11. Gravity-anomaly profiles across Seamount Jasper. (After Harrison and Brisbin, 1959.) Measured gravity corrected for the Eotvos effect is next reduced to sea-level. A shipboard measurement is taken close to sea-level and only a small correction for the free-air gradient is needed. The value of gravity at the latitude of observation according to the International Formula is subtracted from this finally corrected observed value.

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. The Earth beneath the sea : History. Ocean bottom; Marine geophysics. 250 mgal 200 150 - 100 50 -50. -\ 0 I T^TTTTTiTnTTTTTrTTTlTm j_ 2 3 4 5 km 50 100 150 km Fig. 11. Gravity-anomaly profiles across Seamount Jasper. (After Harrison and Brisbin, 1959.) Measured gravity corrected for the Eotvos effect is next reduced to sea-level. A shipboard measurement is taken close to sea-level and only a small correction for the free-air gradient is needed. The value of gravity at the latitude of observation according to the International Formula is subtracted from this finally corrected observed value. This difference is known as the free-air anomaly by analogy with the free-air anomaly on land. In fact the correction to sea-level for a sea observation is trivial, and it is not necessary to make any. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Hill, M. N. (Maurice Neville), 1919-. New York : Interscience Pub.

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Keywords: ., bookcentury1900, bookcollectionbiodivers, booksubjectoceanbottom