Rock group | Igneous |
Classification | Intrusive/plutonic |
Composition | Intermediate |
Texture | Phaneritic |
Extrusive counterpart | Andesite |
Common minerals | Plagioclase feldspar Biotite Hornblende Pyroxene Quartz |
Diorite in Hand Sample
Diorite
Two small samples of diorite
Diorite intruded by granite pegmatite dike
Diorite in Thin Section
Thin Section GigaPans
Diorite in plane polars
Diorite in crossed polars
Another diorite in plane polars
Another diorite in crossed polars

Diorite, plane polars
Diorite in plane polarized light. Magnification: 40x Click here for crossed polars: Click here to explore this slide in plane polars: https://viewer.gigamacr…

Diorite, crossed polars
Diorite in cross polarized light. Magnification: 40x Click here for plane polars: https://youtu.be/6TXLUPiB6uA Click here to explore this slide in plane pola…

Diorite, Plane Polars
Diorite in plane polarized light. Magnification: 40x Click here to see diorite rotating in crossed polars: https://youtu.be/A8SpBXD1c9g Click here to explore…

Diorite, Crossed Polars
Diorite in cross polarized light. Magnification: 40x Click here to see diorite rotating in plane polars: https://youtu.be/HAt6wFmHN7M Click here to explore t…