Challenger Knoll (Challenger salt dome), Sigsbee Abyssal Plain, Gulf of Mexico

Cap rock over a salt diapir near the center of the Gulf of Mexico.

Ref.: Henry, D., et al. Sector-zoned tourmaline from the cap rock of a salt dome. European Journal of Mineralogy, 16, 335-344 (in press). www.geol.lsu.edu/henry/Research/tourmaline/caprock_tur/turcaprock.htm.

Mineral List:

	Calcite

	Oxy-Dravite

	Quartz

	Sulphur

4 entries listed. 3 valid minerals.

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