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
Granite Flats industry standard in Hollywood. On June 25, 2015, "Granite Flats" Executive Producer and BYUtv Director of Content, Scott Swofford, announced the end of the series after three seasons, calling it a "huge success." According to Swofford, "We look forward to what is on the horizon in the form of additional scripted content at BYUtv and have chosen to concentrate resources on these ideas and forego producing a fourth season of "Granite Flats"." Granite Flats Granite Flats is BYUtv's first original scripted television drama series. The show is set in a small Colorado town in the early 1960s during the Cold