- - Like rock when surrounded by sea
- - Like dark igneous rock
- - Like much Hawaiian lava
- - Like rock found at midocean ridges
- - Like some lava
- - Like the Rosetta Stone
- - Like block lava
- - Break a slab, turning over about one ton of rock
- - When in sea, it's rocky
- - Of a dark, volcanic rock
- - Type of volcanic rock
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