Rock group | Igneous |
Classification | Intrusive/plutonic |
Composition | Mafic |
Texture | Phaneritic |
Extrusive counterpart | Basalt |
Common minerals | Clinopyroxenes (e.g., augite) Ca-rich plagioclase feldspars (e.g., labradorite, bytownite) Olivine Amphibole |
Gabbro GigaPans
Gabbro
Plag-rich gabbro from Fetlar, Shetland
Gabbro in Thin Section
Thin Section GigaPans
Gabbro, plane polars
Gabbro, crossed polars
Olivine in gabbro, plane polars
Olivine in gabbro, crossed polars

Gabbro, Plane Polars
Gabbro in plane polarized light. Magnification: 40x Click here to watch gabbro rotate in crossed polars: https://youtu.be/u4onAlLY58o Click here to explore t…

Gabbro, Crossed Polars
Gabbro in cross polarized light. Magnification: 40x Click here to watch gabbro rotate in plane polars: https://youtu.be/08gP25pvNf8 Click here to explore thi…

Olivine, Plane Polars
Olivine in plane polarized light. Magnification: 40x Rock: gabbro To view this mineral in crossed polars, click here: https://youtu.be/0AxsEeyMIHU To explore…

Olivine, Crossed Polars
Olivine in cross polarized light. Magnification: 40x Rock: gabbro To view this mineral in plane polars, click here: https://youtu.be/Qpbc1xR3gSc To explore a…