original – Page 8 – Emily Zawacki, Ph.D.

mineralogy

Chrysocolla

July 13, 2014August 15, 2018 itssedimentary

Image by author

mineralogy

Actinolite

July 12, 2014August 15, 2018 itssedimentary

Image by author

mineralogy

Tourmaline in quartz

July 11, 2014August 15, 2018 itssedimentary

Image by author

mineralogy

Quartz, pyrite, sphalerite, selenite

July 10, 2014August 15, 2018 itssedimentary

Specimen from Anselmo Mine, Butte, Montana Image by author

mineralogy

Micas

July 9, 2014August 15, 2018 itssedimentary

Lepidolite (left) Muscovite (center) Biotite (right) Image by author

mineralogy

Garnet

July 8, 2014August 15, 2018 itssedimentary

Dodecahedral garnet crystal Image by author

Blog

You breccia!

July 6, 2014August 15, 2018 itssedimentary

I made some slices of one of the breccias from my research site, and look at how pretty they look! [Breccias are rocks composed of broken fragments of other rocks or minerals, all cemented together in a fine-grained matrix]

sedimentary

Banded Iron Formation

July 5, 2014August 15, 2018 itssedimentary

Get to know BIFs. Get to love BIFs. HERE are some more absolutely beautiful BIFs that I saw while in northeastern Minnesota. Image by author

petrology, tectonics

Eclogite

July 4, 2014August 15, 2018 itssedimentary

Besides its aesthetic beauty and awesome vibrant colors, eclogite is a very rare and important rock. Eclogites are mafic metamorphic rocks that are formed in subduction zone settings. They experience metamorphism at extremely high pressures (1.2 GPa), greater than those typical of the Earth’s crust, as well as medium to high temperatures. They are responsible… Continue reading Eclogite

petrology

Rapakivi granite

July 2, 2014August 15, 2018 itssedimentary

Wolf River Batholith (WI) - 1.45 Ga Ravakipi is a rather unusual, and distinctive, type of granite with rounded orthoclase (K-spar) crystals. These crystals typically have plagioclase rims, and hornblende and biotite are other common minerals present. Image by author