1) Like block lava 2) Like dark igneous rock 3) Like much Hawaiian lava 4) Like some lava 5) Like the Rosetta Stone 6) Of a dark gray rock 7) Of a dark, volcanic rock 8) Volcanic rock 
• (a.) Pertaining to basalt; formed of, or containing, basalt; as basaltic lava.
Ba·salt'ic adjective [ Confer French basaltique .] Pertaining to basalt; formed of, or containing, basalt; as basaltic lava. 
[adj] - of or relating to or containing basalt
adjective of or relating to or containing basalt; `basaltic magma is fluid`