Define vertebrate: any of a subphylum (Vertebrata) of chordates that comprises animals (such as mammals, birds, reptiles, â¦ â vertebrate in a sentence any of a subphylum (Vertebrata) of chordates that comprises animals (such as mammals, birds, reptiles, amphibians, and fishes) typically having aâ¦ See the full definition
Definition of LIGNITE. : a usually brownish black coal intermediate between peat and bituminous coal; especially: one in which the texture of the original wood is distinct âcalled also brown coal.
Crystal Description. Rhyolite is an igneous extrusive volcanic rock, containing around 70% silica. Typically, crystals are too small to see (aphanitic), and sometimes larger crystals surrounded by a fine grained or glassy matrix containing quartz or feldspar form (porphyritic).Rhyolite is often found with banding, making for a decorative ornamental stone which is sometimes used for jewellery.hyolite allows the re-processing of past events as seen from the present moment, stimulating acceptance and healing, transcending into a state of joyous potential, and actualising a deep sense of respect, worth and esteem.