Thin sections

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Thin sections

• by rjswope

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Biotite ppl
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Biotite rotated 45 deg wrt last photo
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biotite
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ppl
feldspar
qtz
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xpolars
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Grain and oil have the same index for yellow light
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Sandstone
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Qtz ppl
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xpolars
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Interference colors
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Quartz pheochryst in volcanic Rx xpolars
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Plag ppl
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xpolars
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Plagioclase xpolars
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Plagioclase xpolars
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Pyroxene and plagioclase (opaque) ppl
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xpolars
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Pyroxene and plagioclase (opaque) ppl
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xpolars
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Plagioclase xpolars
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Zoned plagioclase xpolars
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plagioclase in volcanic rx ppl
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xpolars
Zoned plagioclase
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Zoned plagioclase ppl
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Zoned plagioclase xpolars
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Microcline ppl
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xpolars
xpolars
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Microcline xpolars
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Microcline with exsolved plagioclase
xpolars
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Weathered k-feldspar also showing exsolution
ppl
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xpolars
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K feldspar with exsolution stringers ppl
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xpolars
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Sanadine phenochryst in rhyolite ppl
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xpolars
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ppl
biotite
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xpolars
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Biotite and feldspar ppl
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xpolars
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ppl
Biotite w/ inclusions of zircon
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Xpolars zircon in biotite
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ppl
muscovite
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xpolars
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Muscovite schist xpolars
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Muscovite xpolars
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ppl
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ppl
hornblende
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ppl
hornblende
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ppl
hornblende
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ppl
hornblende
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xpolars
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Hornblende ppl
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Hornblende xpolars
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Pyroxene and plagioclase (opaq.) ppl
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Xpolars
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Cpx and plag (opaques) ppl
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xpolars
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Cpx and plag ppl
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xpolars
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Plag in large cpx grains ppl
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xpolars
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Cpx, olivine and plag ppl
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xpolars
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Olivine, cpx and plag (opaq.) ppl
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xpolars
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Olivine cpx and plag (opaq.) ppl
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xpolars
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Olivine pyroxene and plag
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xpolars
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basalt
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(No Transcript)
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(No Transcript)
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Euhedral olivine phenochryst in a basalt xpolars
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Olivine altered to serpentine along cracks
xpolars
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Olivine phenochrysts in basalt xpolars
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Olivine xpolars
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Garnet mica schist ppl
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xpolars
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ppl
Sphene
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xpolars
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Calcite marble xpolars
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Glacial ice xpolars
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(No Transcript)
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Glass from lunar soil ppl
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xpolars
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(No Transcript)
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Anorthosite breccia from the lunar highlands
ppl
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xpolars
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Plag xpolars
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A method for determining feldspar composition
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Olivine phenochrysts in basalt ppl
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xpolars