doleritic


dol·er·ite

D0327900 (dŏl′ə-rīt′)n. Chiefly British A dark, fine-grained igneous rock; diabase.
[French dolérite, from Greek doleros, deceitful (from its easily being mistaken for diorite), from dolos, trick; see del- in Indo-European roots.]
dol′er·it′ic (ə-rĭt′ĭk) adj.