subsalt en · ADJ
Etymology
From sub- + salt.
Meanings
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(not-comparable) Lying beneath a layer of salt.
The subsalt basin that contains Tupi, the new deepwater field estimated to hold the equivalent of five billion to eight billion barrels of light crude oil, is creating a buzz among the world’s largest oil companies.
2008 January 11, Alexei Barrionuevo, “Hot Prospect for Oil’s Big League”, in New York Times: