R-1824

Title: R-1824
Description: This phaneritic rock contains high amounts of sodic plagioclase feldspar, biotite, and hornblende. There is chlorite present in the thin section; as it usually forms from biotite. This rock could've formed in an area where slow cooling took place; perhaps at a medium depth to account for the presence of hornblende and biotite.
Contributor: Dave Biggers
Mediator: Tamara Carley (carleyt@lafayette.edu)
Rights Holder: Lafayette College Department of Geology and Environmental Geosciences

Media: https://exhibits.lafayette.edu/geology/files/original/c238771b4d18001d5a838a8cb7fcc708.JPG; https://exhibits.lafayette.edu/geology/files/original/79223f421d01896e7f3a704df2d015d8.png; https://exhibits.lafayette.edu/geology/files/original/2f430dbdf1a2e1439ae632f2f721f903.jpeg; https://exhibits.lafayette.edu/geology/files/original/2825bac08c2118d9ab744fab9e8e0b38.jpeg; https://exhibits.lafayette.edu/geology/files/original/4e9bcbbe9372ae00a9ed946fba8b76a0.jpeg; https://exhibits.lafayette.edu/geology/files/original/ec9fe5eb632df7ec7d48fe42794ff6ad.jpeg