Hornblende tutorial Optical mineralogy

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>> DOWNLOAD LINK 🎞️ #2 <<

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>> YOUR LINK HERE: ___ http://youtube.com/watch?v=_fvlPnNh0yM

Several videos of hornblende in thin section, showing typical textures and optical characteristics. Supported by Boise State University and the US National Science Foundation. • Key characteristics: moderate relief, amphibole (60°-120°) cleavage, blue-green-brown pleochroism, low interference colors. • 00:00​ Typical plutonic • 00:30 Granulite-facies, end section • 01:01 Plutonic, zoned (pale green to brown pleochroic) • 01:32 Typical metamorphic (green to blue-green pleochroic) • 02:02 Garden-variety amphibolite • 02:33 Mg-rich (pale pleochroic) • 03:04 Pale blue-green pleochroic

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