syenodiorite

syenodiorite

[¦sī·ə·nō′dī·ə‚rīt]
(petrology)
Plutonic rock consisting of acid plagioclase, orthoclase, and a ferromagnesian mineral.
References in periodicals archive ?
aIe (as in fire) ye io i iro syenodiorite (a type of rock) tiring-irons
Figure 5 shows the extent of the favourable brucite-bearing zone in the Marble Canyon area of Texas, which developed in dolomitic rocks that surrounded an elliptically shaped intrusive complex, consisting of horn-blende-bearing granite, syenodiorite and syenogabbro (Newman and Hoffman 1996).