Based on these petrological investigations, a conceptual model of magma鈥搒ediment鈥揻luid interaction is proposed distinguishing top and bottom contact processes. Initial contact metamorphism due to sill emplacement is characterized by dehydration reactions in sediments and crystallization of...
Metamorphic rock, any rock that results from the alteration of preexisting rocks in response to changing conditions, such as variations in temperature, pressure, and mechanical stress, and the addition or subtraction of chemical components. The preexisti
Metamorphic rock - Regional, Foliated, Pressure: Regional metamorphism is associated with the major events of Earth dynamics, and the vast majority of metamorphic rocks are so produced. They are the rocks involved in the cyclic processes of erosion, sedi
Contact metamorphism occurs when magma intrudes or forces its way into existing rock. The heat of the magma bakes the surrounding rocks causing them to change. This is a local event. The changes due to contact metamorphism are relatively small and are said to be low-grade metamorphism. An ex...
generallyisanextrusiverock;ifrockmineralsare fine-grainedandporphyriticstructure,thatisbetweenthetwo, whichbelongstotheclassofrocks.Itispossibletoinfer theformationenvironmentofrocks,thenumberofvolatile componentsandthedirectionofmagmaflowbyobservingwhether themineralsintherockarealignedornot.Ifthereisno directional...
Hornfels is a tough, fine-grained rock that is made by contact metamorphism where magma bakes and recrystallizes the surrounding rocks. Note how it breaks across the original bedding. 10 of 18 Marble Andrew Alden Marble is made by regional metamorphism of limestone or dolomite rock, causing the...
Hornfels is a rock that was "baked" while near a heat source such as a magma chamber, sill, or dike. The specimen shown above is about two inches (five centimeters) across.ADVERTISEMENT Marble is a non-foliated metamorphic rock that is produced from the metamorphism of limestone or ...
Toward the center of the dome, metamorphic assemblages record an increase in peak-temperature and corresponding pressure (from 500 to 700掳C, and from 5 to 8 kbar), in a medium-pressure/medium-temperature (MP/MT) metamorphic field gradient. Whole-rock, muscovite and biotite on two samples ...
başkalaşım kayaçları, Başkalaşım kayaçları, başkalaşım kayacı, metamorfik kayaç是“metamorphic rock"到 土耳其文 的最佳翻译。 译文示例:Paleozoic era metamorphic rocks. ↔ Taşlar, Paleozoik Devre. ait bilindik başkalaşım taşları. metamorphic...
It then metamorphoses to a gneiss, in which many new minerals have grown. As metamorphic grade increases still further, the rock will begin to melt. The rock formed when a gneiss begins to melt is called magmatite. If the melting continues, the entire rock will melt and a magma is formed...