Three basic types of magma: 1  Mafic or Basaltic-- SiO2 45-55 wt%, high in Fe, Mg, Ca, low in K, Na. 2  Intermediate or Andesitic-- SiO2 55-65 wt%, intermediate. in Fe, Mg, Ca, Na, K. 3  Felsic or Rhyolitic-- SiO2 65-75%, low in Fe, Mg, Ca, high in K, Na.
intensity noun [U]. âº the âquality of being âextreme in âstrength or âforce: Simone âsings with âemotional intensity. The âlight âhit us with such intensity that we âducked. âº art Intensity in a âwork of âart âdescribes the âstrength of the âcolor, âsound, âlight, or âfeeling. (Definition of intensity from the Cambridge Academic Content Dictionary Â© Cambridge University Press).
Full Definition of INTENSITY. 1. : the quality or state of being intense; especially: extreme degree of strength, force, energy, or feeling. 2. : the magnitude of a quantity (as force or energy) per unit (as of area, charge, mass, or time). 3.: saturation 4a. See intensity defined for English-language learners. See intensity defined for kids.edical Definition of INTENSITY. 1. : the quality or state of being intense; especially: extreme degree of strength, force, energy, or feeling.