- a granular igneous rock consisting essentially of plagioclase feldspar and hornblende.
Origin of diorite
Examples from the Web for diorite
Historical Examples of diorite
Quartz porphyry, diabase and diorite appear in the Ardennes.
A diorite block, found at Susa in 1902, has the law engraved on it.The Lords of the Ghostland
Diorite is a crystalline aggregate of a soda-felspar and hornblende.
What is the mineralogical composition of syenite and diorite?
They are in diorite, and have the name of Apepi engraved upon them.Ancient Egypt
- a dark coarse-grained igneous plutonic rock consisting of plagioclase feldspar and ferromagnesian minerals such as hornblende
Word Origin for diorite
- A gray, coarse-grained plutonic rock. Diorite consists mainly of sodium-rich plagioclase and one or more mafic minerals such as biotite, hornblende, or pyroxene. It is the coarse-grained equivalent of andesite.