Define metamorphic rock. metamorphic rock synonyms, metamorphic rock pronunciation, metamorphic rock translation, English dictionary definition of metamorphic rock. Sedimentary or igneous rock altered by great heat or pressure, e.g. limestone changed to
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
pyrometamorphic changes in sedimentary rock Word History Etymology pyrometamorphism + -ic Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary. Start your free trial today an...
Metamorphic rocks are rocks formed from other types of existing rock due to changes in heat or pressure. Learn about the definition and examples of metamorphic rocks and discover facts about how these rocks are formed. What Are Metamorphic Rocks? Rocks are divided into three main categories: ig...
If the schist is metamorphosed further, it might become a granular rock known as gneiss. A rock does not need a specific mineral composition to be called "schist." It only needs to contain enough platy metamorphic minerals in alignment to exhibit distinct foliation. This texture allows the ...
A single rock unit such as the Tuscarora Sandstone of the central Appalachians might fully fit the definition of quartzite in the parts of its extent where its quartz grains have been metamorphosed into a durable interlocking mass. It would be better called "sandstone" in other areas. Between ...
reaction history. Alternatively, it is by no means certain that all temperature and pressure changes of a rock's environment are actually recorded in textural and compositional information (Figure 1D). Thus the simple linking of different PT points to form a PTt path, although common practice, ...
Accurate simple tests in uniaxial tension and compression provided sufficient data for the definition of the yield loci of the material, at the considered loading step. These tests may be complemented with biaxial and triaxial modes of loading of the specimens. The results improve the accuracy and...
(point 2940) under the 600 m high south-wall of Allalinhorn and at the E-Hohlaubgrat. Composition data for all rocks and all minerals can be found in Bucher & Grapes,2009. Additional new rock composition data including trace elements and REE are given on Additional file1: Tables S1–S4...
This alteration increased the size of the mineral grains and segregated them into bands, a transformation which made the rock and its minerals more stable in their metamorphic environment. ADVERTISEMENT Gneiss can form in several different ways. The most common path begins with shale, which is a ...