What is gneiss

Elements of Agricultural Chemistry Thomas Anderson. Guatemala, the country of the future Charles M. The Home of the Blizzard Douglas Mawson. Derived forms of gneiss gneissic , gneissoid or gneissose , adjective.

Introduction Features Igneous rocks Sedimentary rocks Metamorphic rocks. Introduction Features Igneous rocks Sedimentary rocks Metamorphic rocks Gneiss Gneiss is a high grade metamorphic rock, meaning that it has been subjected to higher temperatures and pressures than schist.

The best way to learn about rocks is to have specimens available for testing and examination. Small rock and mineral specimens about one inch in size are usually adequate for student examination and identification.

However, many rock units, identified as gneiss in the field, have bands that are thicker than one inch. If samples of these rock units are broken into one-inch pieces, many of them will be too small to exhibit the banding features of gneiss. This will confuse many students and cause others to incorrectly identify the rock.

Teachers can avoid these problems by collecting specimens that clearly display a banded structure. Teachers who purchase specimens must examine them carefully before they are presented to students. After students have learned to identify gneiss and many other rock types, presenting specimens of gneiss that do not exhibit banding can be a challenging way to have students: A consider possibilities that are not obvious, and, B realize that a single rock specimen may not adequately represent a rock unit.

Article by: Hobart M. Find Other Topics on Geology. Maps Volcanoes World Maps. What Is Gneiss? How Does Gneiss Form? Rock, Mineral and Fossil Collections. Hardness Picks. Flint, Chert, and Jasper. Tumbled Stones. Fluorescent Minerals. Homophones, Homographs, and Homonyms The same, but different. Merriam-Webster's Words of the Week - Nov. Ask the Editors 'Everyday' vs.

What Is 'Semantic Bleaching'? How 'literally' can mean "figuratively". Literally How to use a word that literally drives some pe Is Singular 'They' a Better Choice? The awkward case of 'his or her'.