However, gravity surveys indicate that the Owens Valley is filled with about of sediment and that the Alabamas are the tip of a very steep escarpment.
12.
Although these are thought of as " old " prospecting methods, these techniques are still used today but usually coupled with more advanced techniques such as geophysical magnetic or gravity surveys.
13.
Gravimeters, small portable units that provide measurements of the force of gravity, were also used by the surveyors to conduct gravity surveys to further understand the topography of the country and the geodetic datum.
14.
Finally, once a basin model of the carbonate sequence is formulated, and the primary basin-margin faults are roughly identified, a gravity survey is often carried out, which is the only geophysical technique which can directly detect MVT deposits.
15.
The discovery of another volcanic centre, the wholly submarine Blackstones Bank Central Complex, was achieved through combining the results of magnetic, seismic and gravity surveys; its large positive gravity anomaly suggesting that it was a candidate site for further research.
16.
From 9 July 1977 to 8 September 1977 she undertook a cruise to the Arctic Ocean, during which time her crew constructed several radar navigation towers along the north coast of Alaska and conducted gravity surveys of the Arctic Ocean.
17.
Major terrestrial gravity acquisitions by NIMA since 1990 include airborne gravity surveys over Greenland and parts of the Arctic and the Antarctic, surveyed by the Naval Research Lab ( NRL ) and cooperative gravity collection projects, several of which were undertaken with the University of Leeds.
18.
:: : : The important points have been touch on, but to add one thing, space gravity surveys can and do resolve trenches-they are still several tens of kilometers wide, much larger than the resolution of the free-air gravity maps . talk ) 17 : 14, 3 May 2010 ( UTC)
19.
The processes could possibly vary depending on the active or passive type of margin encountered, such as gravity surveys have implied that the ophiolite is underlain by continental crust whose relative buoyancy uplifted the ocean crust, which in some circumstances could eventually lead to sliding onto the accretionary wedge ( or now Eratostines seamount subducted for Troodos ).
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