Granite may have more alkali feldspar, whereas a granite derived from partial melting of metaigneous rocks may be richer in plagioclase. It is on this basis that the modern "alphabet" classification schemes are based. The letter-based Chappell & White classification system was proposed initially to divide granites into I-type (igneous source) granite and S-type (sedimentary sources). Both types are produced by partial melting of crustal rocks, either metaigneous rocks or metasedimentary rocks. M-type granite was later proposed to cover those granites that were clearly sourced from crystallized mafic magmas, generally sourced from the mantle. However, this proposal has been rejected by
Rock What You Got Rock What You Got Rock What You Got is the fifth album from the band Superchick. It was released on June 24, 2008. The album debuted at No. 65 on the "Billboard" 200 album chart, selling nearly 10,000 copies its first week. The band has described the album as more progressive, in-your-face sound and has dubbed it "rock-o-tronic". In May 2008, Inpop released three radio singles from the album. "Hold" was played on Christian contemporary hit radio stations, "Crawl" went to adult contemporary stations, and "Hey, Hey" to Christian rock stations. In late May, Inpop Records released a free download