noun. A banded or foliated metamorphic rock, usually of the same composition as granite.

noun. A rock which consists essentially of the same mineral elements as granite, namely orthoclase, quartz, and mica, but in which there is a more or less distinctly foliated arrangement of the constituent minerals, and especially of the mica.

noun. A crystalline rock, consisting, like granite, of quartz, feldspar, and mica, but having these materials, especially the mica, arranged in planes, so that it breaks rather easily into coarse slabs or flags. Hornblende sometimes takes the place of the mica, and it is then called hornblendic gneiss or syenitic gneiss. Similar varieties of related rocks are also called gneiss.

noun. A common and widely-distributed metamorphic rock having bands or veins, but not schistose.

noun. a laminated metamorphic rock similar to granite

"The stratified gneiss, which is the underlying rock of much of this part of the country, dips toward the centre of the continent, but the strata are often so much elevated as to appear nearly on their edges."

bojan gneiss  fundamental gneiss  hercynian gneiss  lewisian gneiss  

metamorphic rock  

hornblendic gneiss  syenitic gneiss  

Brice  Bryce  Grice  Nice  Price  

alabaster  augite  basalt  breccia  cornelian  

aa  abyssal rock  basalt  bedrock  block lava