Black lava from this bizarre volcano could reveal Earth's deep secrets

Tanzania's Ol Doinyo Lengai is the only volcano known to spew out carbonatite lava, which could offer fresh clues about Earth's mysterious mantle – but getting hold of a sample is no simple matter

Black lava from this bizarre volcano could reveal Earth's deep secrets
Tanzania's Ol Doinyo Lengai is the only volcano known to spew out carbonatite lava, which could offer fresh clues about Earth's mysterious mantle – but getting hold of a sample is no simple matter