peripheral motor neuron. Etymology: Gk, periphereia + L, motor, mover; Gk, neuron, nerve. an effector neuron located outside the central nervous system, usually in a ganglion of the sympathetic or parasympathetic nervous system.
Gneiss rock is further characterized by its alternating light and dark bands of minerals. Gneiss forms from volcanic rock, shale, or granitic. Quartz is typically abundantly found in gneiss. The bands that form on gneiss rock are due to the various rocks that are a part of its make-up. The use of the word gneiss dates back to the mid-1700s. Gneiss rocks that originate as sedimentary rock are called paragneiss and those originating as igneous rock are called orthogneiss. Limestone can change into calcareous gneiss which contains calcium carbonate.
Gneiss is a foliated metamorphic rock which can be derived from several protoliths. Granite is an intrusive igneous rock, formed from the solidification of felsic magma.onfidence votes 83.6K. Marble is a nonfoliated metamorphic rock made of carbonate minerals, particularly calcite. It is formed by the metamorphism or limestone. Gneiss is a foliated metamorphic rock made of silicate minerals such as quartz and feldspars, and micas. It forms from the metamorphism of granite or schist.