Granodiorite
| Granodiorite is an intermediate coloured,
medium to coarse-grained intrusive
rock. It falls between granite
and quartz diorite,
containing more dark minerals than granite but less than quartz diorite. The light
coloured minerals are quartz and feldspar; the feldspar is a mixture of orthoclase and
plagioclase. The dark coloured crystals are hornblende and/or biotite. Granodiorite is a
very common intrusive rock in British Columbia. |
 |
| Hornblende granodiorite |
 |
 |
| Granodiorite |
Biotite granodiorite |
 |
| Hornblende-biotite
granodiorite |
Return to Classification
Return to Introduction
For questions or more information on geology and minerals
in British Columbia please contact GSB Mailbox or
check out the rest of our website. B.C. residents may use the Enquiry B.C. toll free number.
|
Last updated May 12, 2005
|
