Editing Gravity anomaly (section)

===Local anomalies===

Local anomalies are used in [[applied geophysics]]. For example, a local positive anomaly may indicate a body of [[metal]]lic [[ore]]s. [[Salt dome]]s are typically expressed in gravity maps as lows, because [[salt]] has a low density compared to the rocks the dome intrudes.{{sfn|Monroe|Wicander|1992|pp=302–303}}

At scales between entire mountain ranges and ore bodies, Bouguer anomalies may indicate rock types. For example, the northeast-southwest trending high across central New Jersey represents a [[graben]] of [[Triassic]] age largely filled with dense [[basalt]]s.<ref>{{cite book |last1=Herman |first1=G.C. |last2=Dooley |first2=J.H. |last3=Monteverde |first3=D.H. |year=2013 |chapter=Structure of the CAMP bodies and positive Bouger gravity anomalies of the New York Recess |title=Igneous processes during the assembly and breakup of Pangaea: Northern New Jersey and New York City: 30th Annual Meeting of the Geological Association of New Jersey |publisher=College of Staten Island |location=New York |pages=103–142 |url=https://www.researchgate.net/publication/270216459 |access-date=29 January 2022}}</ref>

The largest continental gravity gradient in the world is found across the Woodroffe Thrust-Mann Fault Zone in central Australia, and is attributed to an upthrust of dense [[Earth's mantle|mantle]] material 30 km closer to the present land surface, which occurred during the 630–520 Ma [[Petermann Orogeny]].<ref>Raimondo, Tom. [https://www.abc.net.au/news/science/2017-07-22/five-places-that-mark-australias-extreme-geological-past/8728928 Five places that mark Australia's extreme geological past], ''[[ABC News (Australia)|ABC News - Science]]'', 22 July 2017. Retrieved 1 February 2025.</ref><ref>Aitken, A. R. A., Betts, P. G., Weinberg, R. F., Gray, D. (23 December 2009).  [https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2008JB006194 Constrained potential field modeling of the crustal architecture of the Musgrave Province in central Australia: Evidence for lithospheric strengthening due to crust-mantle boundary uplift] ''[[Journal of Geophysical Research]]''. {{doi|10.1029/2008JB006194}}</ref>