The main factors that control metamorphic processes are: The chemical composition of the parent rock. The temperature at which metamorphism takes place. The pressure applied, and whether the pressure is equal in all directions or not. The amount and type of fluid (mostly water) that is present during metamorphism. WhyRead More →
Uluru is the most iconic natural landform in Australia — and its formation is an equally special story of creation, destruction and reinvention. The origins of Uluru (and Kata Tjuta) date back about 500 million years, to around the same time the Australian continent was formed. How much of AyersRead More →
Uluru rock is composed of arkose, a coarse grained sandstone rich in the mineral feldspar. The sandy sediment, which hardened to form this arkose, was eroded from high mountains composed largely of granite. Kata Tjuta rock is a conglomerate – gravel consisting of pebbles, cobbles and boulders cemented by sandRead More →
The difference between granite and gneiss is in their overall texture and movement. Granite is evenly speckled. It formed from liquid magma that cooled and crystallized. Granite is like rocky road ice cream – a solidified conglomeration of different ingredients. How do you identify gneiss? gneiss, metamorphic rock that hasRead More →
To set some ground rules: All of these are igneous rocks. Granite and rhyolite are considered felsic, while basalt and gabbro are mafic (click here for more information on mafic and felsic). What type of igneous rocks are basalt and rhyolite? Extrusive igneous rocks erupt onto the surface, where theyRead More →
During the historic 1957 desegregation of Little Rock Central High School, 26-year-old journalist Will Counts took a photograph that gave an iconic face to the passions at the center of the civil-rights movement—two faces, actually: those of 15-year-old Elizabeth Eckford on her first day of school, and her most …Read More →
Common minerals include quartz, feldspar, mica, amphibole, olivine, and calcite. A rock is an aggregate of one or more minerals, or a body of undifferentiated mineral matter. Common rocks include granite, basalt, limestone, and sandstone. What rock makes phyllite? phyllite, fine-grained metamorphic rock formed by the reconstitution of fine-grained, parentRead More →
Connect 3 is the fictional band in Camp Rock. It is made up of Shane, Nate and Jason Gray. Which Jonas Brothers are in Camp Rock? Starring Demi Lovato, Joe Jonas, Nick Jonas and Kevin Jonas, Camp Rock was one of the network’s biggest hits, spawning a sequel, attracting 8.9Read More →
Andesite most commonly denotes fine-grained, usually porphyritic rocks; in composition these correspond roughly to the intrusive igneous rock diorite and consist essentially of andesine (a plagioclase feldspar) and one or more ferromagnesian minerals, such as pyroxene or biotite. What classification is andesite? Andesite is an aphanitic (fine-grained) igneous rock thatRead More →
Motion Preferences A glider slides back and forth in a smooth horizontal motion, while a rocker sways back and forth in a stronger movement. If you favor the gentler feel, a glider offers the best choice. Some gliders have a swivel base, which allows you to turn to the rightRead More →