Sentences with phrase «revealing rich deposits»

Not exact matches

As part of a search for the cause, geologic tests revealed large deposits of arsenic - rich minerals steadily leaching into groundwater, causing levels in many wells to top 500 ppb.

Ironically, the very marine core drilling expedition (Brinkhuis et al and many other papers last year in Nature) that yielded disturbing indications that the Arctic climate can warm more dramatically than previously thought also revealed extremely organic - rich sediments which might portend oil deposits — which, if tapped would help restore the very conditions under which these organics were deposited in the first place.