How To Use Metamorphism In A Sentence
-
When ocean Serpentosphere is subducted beneath continental or oceanic crust areas, it converts to antigorite-dominated serpentinite rock generally coincident with greenschist facies metamorphism.
At it Again
-
Lapis lazuli is an ornamental rock formed by the regional metamorphism of limestone; it has blue lazurite (sodium calcium aluminosilicate sulphate), white calcite, and pyrite as its main constituents.
-
The zone of coal metamorphism is evident and related to the distribution of diabase which intrusion after main coal formation.
-
The thick Thunderhead Sandstone (Upper Precambrian Great Smoky Group) in the Great Smoky Mountains along the Tennessee/North Carolina border was deformed and regionally metamorphosed during formation of the Appalachian Highlands, beginning in the so-called Devonian (that is, early in the Flood year).12-14 With increasing temperatures and pressures from northwest to southeast, the regional metamorphism produced in these sandstone layers a series of chemically and mineralogically distinct zones of schists and gneisses.15 These zones are named according to the first appearance of the distinctive metamorphic minerals which characterize them as the intensity of the metamorphism increased laterally—the biotite, garnet, staurolite, and kyanite zones.
Ken Miller in Cleveland: WEBCAST ARCHIVE URLS - The Panda's Thumb
-
Polyphase deformation accompanied metamorphism of the original sediments, that were probably dolomite, shales and siltstones.
-
Both thrust and normal faults initiated synchronously with Miocene prograde metamorphism and melting, and have moved episodically since then.
-
Basically, a process called metamorphism caused the basalts in Shenandoah to recrystallize with new minerals, such as chlorite, epidote, and albite, which help give the rocks their greenish hue.
The Killing Hour
-
Textural relationships and geological context need to be determined to distinguish these burial-related phases from monazites ascribed to granite metasomatism or low-grade metamorphism.
-
These rocks were later affected by low-grade metamorphism under high geothermal gradients.
-
Given the stability of zircon during metamorphic processes, it may be assumed that the formation of new zircons in prograde metamorphism is not significant until the appearance of melt.
-
These rocks display clear prograde metamorphism that peaks in granulite facies.
-
It is not yet certain whether the high-grade metamorphism and granite formation at c.930 Ma are related to a ‘Grenvillian’ or slightly younger collisional event, or to an episode of rifting and crustal thinning.
-
Almandine originated from regional metamorphism to which magmatic thermal metamorphism$...
-
Baked contacts with host rocks indicate that metamorphism associated with intrusion predates shearing.
-
He regarded metamorphism and deformation as continuously related processes and found it impossible to accept migmatites as metamorphic rocks.
-
Basically, a process called metamorphism caused the basalts in Shenandoah to recrystallize with new minerals, such as chlorite, epidote, and albite, which help give the rocks their greenish hue.
The Killing Hour
-
In the mountains of Pennsylvania the same coal beds, somewhat affected by the metamorphism which all the rocks of the Alleghanies have shared, have reached the stage of _semi-bituminous_ coals, where half the volatile constituents have been driven off; again, in the anthracite basins of eastern Pennsylvania, the distillation further effected has formed from these coals _anthracite_, containing only from three to ten per cent. of volatile matter; while in the focus of metamorphic action, at Newport,
Scientific American Supplement, No. 362, December 9, 1882
-
Afterward, global large-scale massive volcanic activity in Permian Period generally brought about metamorphism whole middle Cambrian Period volcanic sediment rock in research area.
-
When ocean Serpentosphere is subducted beneath continental or oceanic crust areas, it converts to antigorite-dominated serpentinite rock generally coincident with greenschist facies metamorphism.
At it Again
-
No such difference in the pressure or temperature of metamorphism in the country rock is detectable.
-
Later, shallower and hotter metamorphism produced widespread sillimanite grade gneisses, migmatites and in situ partial melting.
-
Acquisition of the intermediate-temperature remanence in the dykes occurred during the greenschist-facies metamorphism, or during cooling at the end of the period of metamorphism and alteration.
-
In contrast to parts of the External Hellenides, the Menderes nappes do not show Tertiary high-pressure metamorphism.
-
These are actually pseudomorphs of sericite (a fine-grained white mica) after cordierite and are found included in hornfels or slate as a product of contact metamorphism.
-
Grossular discovery and vesuvianite contact metamorphism of limestone, diopside, wollastonite and wernerite.
VInvesting.com
-
These rocks display clear prograde metamorphism that peaks in granulite facies.
-
In the near field above the container the borehole will be very effectively sealed by melting, recrystallization and metamorphism of the host rock backfill.
-
The Moine rocks widely record polyphase deformation and metamorphism up to amphibolite facies.
-
From Pliocene time the shallow emplacement of intrusive bodies resulted in thermal metamorphism (forming, for example, biotite, cordierite, andalusite, K-feldspar and corundum in pelites) and hydrothermal activity.
-
Furthermore, prograde metamorphism can result in weakening and superplastic behaviour of the rocks affected, as fluid pressure rises, minerals are weakened, and the grain-boundary structure is transformed by breakdown and growth.
-
The classic mode of skarn formation involves high-temperature contact metamorphism wherein a silicate magma is intruded into a carbonate-rich sedimentary rock such as a limestone.
-
In particular, in convective cooling the fluids that infiltrate the rocks lead to extensive thermal metamorphism and hydrothermal alteration in comparison with pure conductive cooling.
-
Thus it was able to undergo intense transformations, such as mechanical deformation or metamorphism, but remain always in proximity to the surface.
-
Metamorphism could be thought of as an extreme form of diagenesis, but diagenetic processes are generally distinguished from metamorphism and are considered in terms of the sedimentary rocks on which they act.
-
Precambrian metamorphism and migmatization and the wide spectrum of mainly Alpine mica ages provide clear evidence for such a polyphase geological history.
-
Baked contacts with host rocks indicate that metamorphism associated with intrusion predates shearing.
-
Both thrust and normal faults initiated synchronously with Miocene prograde metamorphism and melting, and have moved episodically since then.
-
The significant time gap between orogenic deformation and thermal metamorphism implies that metamorphism in many other orogens may not necessarily be due to compressive tectonics.
-
Petrographical evidence establishes that peak thermal metamorphism produced largely random growth of kyanite, staurolite, biotite, monazite and xenotime that overprinted those fabrics.
-
This was a rather surprising finding given that rutile ages commonly tend to post-date the time of metamorphism.
-
Uvarovite is formed from the metamorphism of impure siliceous limestones and some other rocks that contain chromium.
-
The phase of metamorphism dealing with the constructive changes in rocks, due to cementation, dynamic movements, and igneous influences, is called _anamorphism_.
The Economic Aspect of Geology
-
Lower amphibolite-grade regional metamorphism predating intrusion of the Ballachulish Igneous Complex may have resulted in some monazite growth.
-
Basically, a process called metamorphism caused the basalts in Shenandoah to recrystallize with new minerals, such as chlorite, epidote, and albite, which help give the rocks their greenish hue.
The Killing Hour
-
Syntectonic intrusion and metamorphism of the cooling Kyzylkain gabbroid bodies proceeded at high chemical activity of water and, practically throughout, were manifested in the production of gabbro-amphibolites regardless of initial body shape and position in the Kempirsay ophiolite structure.
-
The rhodonite deposit was for- med mainly through two stages, sedimentation and regional metamorphism, and its genetic type belongs to epithermal metamorphic facies.
-
Vesuvianite forms as a result of contact metamorphism on impure limestones and is usually found with other exotic minerals.
-
Metamorphic rock names may reflect any or all of the following: the nature of the parent rock; the grade of metamorphism and the minerals present; the texture of the rock.
-
Attention: Melon and fruit does not want to wash, can wipe with dry cloth when need, allow easy cankered metamorphism otherwise.
-
A striking characteristic of the Hellenides in the Aegean is the southward propagation of nappe emplacement and high - pressure metamorphism.
-
Intrusion of diabase at Mt. Butters has resulted in low-grade contact metamorphism of the pre-existing sedimentary strata.
-
Overall the temporal progradation of nappe emplacement and high-pressure metamorphism towards the south mimics the southward retreat of the Hellenic subduction zone.
-
However, this age could equally relate to post obduction metamorphism.
-
The heat and/or pressure experienced during metamorphism causes the calcium carbonate to recrystallize into a tightly interlocking mass of calcite crystals.
