Gabbro

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, plane 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, crossed polars

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 in gabbro, XPL

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 in gabbro, XPL

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…