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A giant impact crater beneath the Wilkes Land ice sheet was first proposed by Richard A. Schmidt in 1962 on the basis of the seismic and gravity discovery of the feature made by the U.S. Victoria Land Traverse in 1959–60 (VLT), and the data provided to Schmidt by John G. Weihaupt, geophysicist of the VLT (Geophysical Studies in Victoria Land, Antarctica, Report No. 1, Geophysical and Polar ...
The magnetic anomalies Bangui and Jackpine Creek, [145] the gravity anomalies Wilkes Land crater and Falkland Islands, [350] and others have been considered as being of impact origin. Bangui apparently has been discredited, [ 25 ] [ 351 ] but appears again in a 2014 table of unconfirmed structures in Africa by Reimold and Koeberl.
A gravity map is a map that depicts gravity measurements across an area of space, which are typically obtained via gravimetry. Gravity maps are an extension of the field of geodynamics. Readings are typically taken at regular intervals for surface analysis on Earth. [1] Other methods include analysis of artificial satellite orbital mechanics ...
English: Free-air gravity anomaly from Earth Gravitational Model EGM2008. The gravity anomaly is the difference between the measured gravity and the normal gravity. The difference is given in the unit milligal (mGal) equal to 10-5 m/s 2.
Wilkes Land is named after Lieutenant Charles Wilkes (later a rear admiral), the American explorer who commanded the 1838–42 United States Exploring Expedition. The naming is in recognition of Wilkes' discovery of the continental margin over a distance of 2,400 km (1,500 miles ) of coast, thus providing substantial proof that Antarctica is a ...
The gravity anomaly at a location on the Earth's surface is the difference between the observed value of gravity and the value predicted by a theoretical model. If the Earth were an ideal oblate spheroid of uniform density, then the gravity measured at every point on its surface would be given precisely by a simple algebraic expression.
Not all National Topographic System maps strictly follow the National Tiling System's linear grid. Some maps also, as an "overedge", cover land in an area which would otherwise be covered by an adjacent map sheet, simply because the latter area does not contain enough land in Canada to warrant a separate printing. [4] [clarification needed]
Geography of Canada by city (14 C) ... Maps of Canada (8 P) Micronations in Canada (5 P) ... Pages in category "Geography of Canada"