2015-CTP-5

Title: 2015-CTP-5
Description: Hand Sample: Right away, it is obvious that this specimen contains garnet, biotite, and quartz. There is also an unknown yellow-ish large grained mineral seen, but is unidentifiable. There is some foliation, but not much.
Thin Section: Unfortunately, garnet is not visible in thin section. However, biotite and quartz are abundant. Some plagioclase and few other trace minerals. Due some issues with grinding the rock, some minerals are cracked along their cleavage.
This rock could be called a garnet, biotite schist. The protolith of this rock would have been slate, shale and even sediment. Under high pressures and temperatures, it would have have to been compressed int a gneiss. his could have occurred because of an orogenic event or something like it.
Creator: Hana Isihara

Media: https://exhibits.lafayette.edu/geology/files/original/b562e5f4827cce78a37bebcd95ac5dfa.jpeg; https://exhibits.lafayette.edu/geology/files/original/e9b82b2fdd7c0ac449088af821f2ab8d.jpeg; https://exhibits.lafayette.edu/geology/files/original/00e7d1119d3599e94ed31d0807cd17a9.jpeg; https://exhibits.lafayette.edu/geology/files/original/f56900db55bb7415a812375a76341bd4.jpeg; https://exhibits.lafayette.edu/geology/files/original/670134b721572afbfa609d55ead96782.jpeg; https://exhibits.lafayette.edu/geology/files/original/2cef525216e63fedb3034e1dabb6a72a.jpeg; https://exhibits.lafayette.edu/geology/files/original/de5579506f8dd029babec8a7f455c366.jpg; https://exhibits.lafayette.edu/geology/files/original/5921d96f764146214a98058e06485b2f.jpg; https://exhibits.lafayette.edu/geology/files/original/02075bf1fa27a47248b807a4356a0191.jpg

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