April 30, 2014 | By Peter Hall, Of The Morning Call. A federal appeals court has ruled against four Pennsylvania judges, including Northampton County's Leonard Zito, who sued to overturn the state's mandatory retirement age for judges.
1 I-type Granites. 2  I-type granites are granites considered to have formed by melting of an original igneous type source. 3  These are generally metaluminous granites, expressed mineralogically by the absence of peraluminous minerals and the absence of peralkaline minerals, as discussed below. wide variety of igneous rocks occur in the continental lithosphere, a reflection of its heterogeneous nature compared to oceanic lithosphere. In addition, because the continents are not subducted and are subject to uplift and erosion, older plutonic rocks are both preserved and accessible to study.
The word granite comes from the Latin granum, a grain, in reference to the coarse-grained structure of such a holocrystalline rock. By definition, granite is an igneous rock with at least 20% quartz and up to 65% alkali feldspar by volume. The term granitic means granite-like and is applied to granite and a group of intrusive igneous rocks with similar textures and slight variations in composition and origin.