What's the difference between diabase and variolite?
Diabase
Definition:
(n.) A basic, dark-colored, holocrystalline, igneous rock, consisting essentially of a triclinic feldspar and pyroxene with magnetic iron; -- often limited to rocks pretertiary in age. It includes part of what was early called greenstone.
Example Sentences:
(1) The gamma-glutamyltransferase inhibitor, AT-125, decreased cystine excretion, but only in the presence of glutathione, glycine, glutamate, and the diabasic amino acids.
(2) The results suggest that an active NS3 proteinase domain is necessary for cleavage at the diabasic nonstructural cleavage sites and that cleavage at the proposed 4A-4B signalase site requires prior cleavage at the 4B-5 site.
Variolite
Definition:
(n.) A kind of diorite or diabase containing imbedded whitish spherules, which give the rock a spotted appearance.