Definition of diabase in English:
Another term for dolerite.
- It is also a widespread constituent of a variety of igneous and metamorphic rocks and is occasionally found in pegmatites and in related veins marginal to igneous rock units ranging from granite to diabase.
- The lower series consists of alternating basalt lava, tuff breccia, tufite, and siliceous rock, whereas the upper one is dominated by diabase.
- Many such dikes in western Maine are classified as alkali diabase.
Definition of diabase in:
- US English dictionary
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