Teachers

For PCSHS Teachers Page Yoshio Okamoto 2022-01-02

How to study rock thin-sections

My Thin Section Page
http://yossi-okamoto.net/Thin-Sections/index.html
EER2021 Poster
http://www.yossi-okamoto.net/conference/EER2021_Poster.pdf

Books:
Atlas of igneous rocks and their textures
https://www.geokniga.org/bookfiles/geokniga-atlas-igneous-rocks-and-their-textures.pdf

YouTube Videos:

1) is basic, 2) is an advanced contents
1) https://www.youtube.com/watch?v=rTI6KypQTJk
2) https://www.youtube.com/watch?v=OuXBLIIs0LA
These videos are excellent video for education! Part 1 contents are enough for high school class room observation, accessory plates are not necessary in middle schools.

Basic concepts are
-Beck line (refraction index; high or low)
-Birefringence (interference colors)
-Extinction angle
-Pleochroism
-Cleavages
-Forms etc.
But these features are just found in nearly 0.03mm thickness of thin section, while other thickness is not suitable for observation.

Also, the following videos show fundamental features of minerals and rocks (these are suitable for beginners more advanced study)

GeoHub Liverpool

Bold fonts are igneous and metamorphic rocks

1) https://www.youtube.com/watch?v=bIMz7UPdENE sandstone
2) https://www.youtube.com/watch?v=T_HGO92nzQ4 biotite and zircon, granite
3) https://www.youtube.com/watch?v=AcBAmTlHU_U olivine and pyroxene, gabbro
4) https://www.youtube.com/watch?v=KEeaE7uJ4Mo garnetand inclusions, muscovite, garnet-mica schist
5) https://www.youtube.com/watch?v=oGYGJ-0S4Rs fossils contained limestone and mudstone
6) https://www.youtube.com/watch?v=J-ezRf-yIbQ ooids and calcite, oolitic limestone
7) https://www.youtube.com/watch?v=8t7_HUmq-So mature sandstone (arkose)
8) https://www.youtube.com/watch?v=7fXFHOZAfyU quartz, feldspar distinction, biotite, porphyritic granophyre (a kind of rhyolite)
9) https://www.youtube.com/watch?v=0V4ndj3NP6M k-feldspar and plagioclase distinction, immature sandstone (arenite)
10) https://www.youtube.com/watch?v=wRhh1XhMn_I zoned and sponged plagioclase, mixing of two magmas, pyroxene 90 deg; amphibole (hornblende) 120 deg. cleavages, porphyritic andesite
11) https://www.youtube.com/watch?v=RkbzxNTe4_E hornblende cleavages and pleochroism, garnet and sphene, garnet hornblende schist