Magnesium-rich olivines are abundant in low-silica mafic and ultramafic igneous rocks and are believed to be the most abundant constituent of the Earth’s upper mantle. Olivine also occurs in high-temperature metamorphic rocks, lunar basalts, and some meteorites.

Olivine thin section photomicrographs are taken in plane-polarized light and cross-polarized light, and can easily be recognized under the microscope.

In this video, we are going to study Olivine Thin Section under Microscope and Observe it's color, cleavage, Relief under ppl and Max...

Photomicrograph of olivine under plane and under cross-polarized light with crystals showing second order interference colors. Note that olivine typically displays no distinct cleavage Photomicrograph of olivine phenocrysts, in a matrix of Hawaiian basalt, in plane light.

Nov 7, 2023 · Olivine is commonly recognized by it high retardation, distinctive fracturing, lack of cleavage, and alteration to serpentine. Colorless to olive green in thin section. Second-order interference colors.

A basalt is a fine-grained basic igneous rock containing essential calcic plagioclase feldspar and pyroxene (usually Augite), with or without olivine. Basalts can also contain quartz, hornblende, biotite, hypersthene (an orthopyroxene) and feldspathoids.

Jun 25, 2022 · Hello, I am Fariha. In this video, We are going to study Olivine Basalt in the Thin Section. Olivine Basalt is an Extrusive Mafic Igneous Rock. We observe bo...

These lenses of maBc-ultramaBc rocks are characterized by different dimensions (500-1500 m in length and 50-600 m in width) consisting of dunite, peridotite, pyroxenite, olivine pyroxenite ...

Olivine and plagioclase in the troctolitic portion from Rhum Layered Complex. XPL image, 2x (Field of view = 7mm) Mesh texture: olivine remnant "islands" rimmed by serpentine + magnetite veins.

Olivine: Usually colorless to pale yellow in thin section, darker colors correspond to higher iron content. Pleochroism of fayalite-rich samples is X = Z = pale yellow, and Y = orangish, yellowish, or reddish brown. Elongate crystals display parallel extinction and may be either length fast or length slow depending on how they are cut.