Crust (geology) depth, reaching values typically in the range from about to at the boundary with the underlying mantle. The temperature increases by as much as for every kilometer locally in the upper part of the crust, but the geothermal gradient is smaller in deeper crust. The continental crust has an average composition similar to that of andesite. The most abundant minerals in Earth's continental crust are feldspars, which make up about 41% of the crust by weight, followed by quartz at 12%, and pyroxenes at 11%. Continental crust is enriched in incompatible elements compared to the basaltic ocean crust and much
The Upper Crust (band) The Upper Crust (band) The Upper Crust is an American hard rock band from Boston, Massachusetts. The members adopt the personae of 18th century aristocratic fops and sing songs from that perspective. They use titles of nobility, wear powdered wigs and period costumes, and maintain a snobbish attitude both during live performance and on their albums. The members say that their guiding philosophy is "if not great and excellent, then debauched." Their major music influence is Bon Scott-era AC/DC, along with glam rock band Kiss and fictional heavy metal band Spinal Tap. "Rolling Stone" wrote, "[d]ismiss Boston's Upper Crust as