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  | isbn    = 0-89181-602-X

  | isbn    = 0-89181-602-X

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Seismic methods do not work well in areas covered by volcanics because of the dispersive nature of the volcanics and because of the decrease in acoustic velocity at the base of the volcanics.

[[Seismic data|Seismic methods]] do not work well in areas covered by [[volcanics]] because of the dispersive nature of the volcanics and because of the decrease in [[acoustic velocity]] at the base of the volcanics.

Volcanic terrain, however, is an ideal environment for MT because it is a simple, three-layer stratigraphic package: resistive basalts over conductive sediments, which in turn overlie resistive metamorphic or granitic basement rocks.

Volcanic terrain, however, is an ideal environment for magnetotelluric (MT) surveys because it is a simple, three-layer stratigraphic package: resistive [[basalt]]s over conductive sediments, which in turn overlie resistive [[Metamorphic rock|metamorphic]] or [[Granite|granitic]] [[basement]] rocks.

==Survey results==

==Survey results==