metamorphic rock


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metamorphic rock

[¦med·ə¦mȯr·fik ′räk]
(petrology)
A rock formed from preexisting solid rocks by mineralogical, structural, and chemical changes, in response to extreme changes in temperature, pressure, and shearing stress.

metamorphic rock

Rock which has been altered in appearance, density, and crystalline structure (and in some cases mineral composition) by high temperature and/or high pressure; e.g., slate is a metamorphic rock derived from shale.
References in periodicals archive ?
Different types of rocks including igneous, sedimentary, and metamorphic rocks carpet the surface and of course subsurface of Kelantan [11,14, 31].
Metamorphic rocks belonging to the Gaira and Taganga groups, igneous rocks of the Santa Marta Batholith and a series of beach deposits occur in the study area.
Large Ion Lithophile Elements (LILE) (barium, strontium), some transition metals (cobalt, except nickel) and High Field Strength Elements (HFSE) (niobium, zirconium, and yttrium) in stream sediments that are associated with beryl exhibited low content about metamorphic rocks. Beryl formation appears to be controlled by upthrust faults and fractures that juxtaposed them with Cr-bearing ophiolitic units and a regime of metasomatic reactions.
On the other hand, garnet porphyroblasts with sigmoidal inclusion trails are not a common feature of regional metamorphic rocks. According to Ikeda et al.
Low rank metamorphic rock fragments (labile) expressed in relation to total rock fragments (Lm/Rt) are low for units T2 and T3 and slightly higher for T1.
The bedrock consisted of multiple layers of quartz, pyrite, graphite, schist and densely grained metamorphic rock with fine sandstone blends.
In short, igneous rock has the lowest average [rho] value but the highest NRM, [kappa], and Q values, followed by those of sedimentary rock, and metamorphic rock has the highest average [rho] value, with the lowest NRM and [kappa] (Table 5 and Figure 6).
IGNEOUS ROCK: Formed when metamorphic rocks melt to form magma (melted rock), which then cools underground or erupts and cools on Earth's surface.
These grains with constituent minerals showing straight to sutured contacts resembling "stretched quartz", indicate derivation from metamorphic rocks (Blatt, 1967).
ANSWERS: 1 Terriers; 2 The Calder; 3 Only Fools And Horses; 4 The Boo Radleys; 5 Tracey Emin; 6 Malta; 7 Coarse-grained foliated metamorphic rock; 8 Sixty (treble twenty); 9 John Bunyan;10 Stephen Hendry.
A Tropeptic Haplorthox formed on metamorphic rock, with high Depreciation Index, was incubated for 3 months in the laboratory at field moisture content, with powdered basalt rock at a rate of 50 t/ha.
How do you know if a rock is sedimentary or metamorphic rock?