Contact between Ortho-gneiss and Para-gneiss
by Metwally Hamza, Research Assistant in the field of geology with international published research papers. Academically interested in cosmic geology & planetary sciences. Geology fiend who likes to take photos of nature & geological features, Egypt
- para-gneiss is derived from sedimentary rocks.
- ortho-gneiss is derived from igneous rocks.
- the difference in the field outcropping between para-gneiss and ortho-gneiss is that para-gneiss is leucocratic to mesocratic "light-colored", but ortho-gneiss is melanocratic to hyper-melanic "dark-colored".
Metwally Hamza (distributed via imaggeo.egu.eu)