A metamorphic facies is a set of mineral assemblages in metamorphic rocks formed under similar pressures and temperatures. The assemblage is typical of...
13 KB (1,402 words) - 19:59, 8 February 2024
amphibolite facies of a marble will not be identical with the amphibolite facies of a pelite. However, the facies are defined such that metamorphic rock with...
37 KB (4,414 words) - 09:37, 11 March 2024
Metamorphism (redirect from Metamorphic aureole)
amphibolite facies of a marble will not be identical with the amphibolite facies of a pellite. However, the facies are defined such that metamorphic rock with...
51 KB (5,769 words) - 18:41, 25 July 2024
Subduction zone metamorphism (redirect from Metamorphic Facies of Subduction Zones)
margins, paired metamorphic belts are further extended to two contrasting metamorphic facies series: one is blueschist to eclogite facies series that was...
19 KB (2,315 words) - 22:30, 2 March 2024
Greenschist (redirect from Greenschist Facies)
prehnite-pumpellyite facies and higher temperatures overlap with and include sub-amphibolite facies. If burial continues along Barrovian Sequence metamorphic trajectories...
11 KB (1,151 words) - 20:46, 16 August 2024
Hornfels (redirect from Hornfels Facies)
sometimes take place. The hornfels facies is the metamorphic facies which occupies the lowest pressure portion of the metamorphic pressure-temperature space....
17 KB (2,160 words) - 14:08, 17 August 2024
series. These are also called metamorphic facies series. A metamorphic facies series is a sequence of metamorphic facies which plot in a temperature-pressure...
2 KB (169 words) - 23:03, 5 February 2022
Amphibolite (redirect from Amphibolite Facies)
Amphibolite facies is usually a product of Barrovian Facies Sequence or advanced Abukuma Facies Sequence metamorphic trajectories. Amphibolite facies is a result...
9 KB (1,012 words) - 14:30, 9 January 2024
prehnite-pumpellyite, blueschist or eclogite facies minerals. Metamorphism Metamorphic facies Anatexis Metamorphic rock Geologic map See for example Best (2003)...
6 KB (587 words) - 17:02, 28 February 2021
Granulite (redirect from Granulite Facies)
Granulites are a class of high-grade metamorphic rocks of the granulite facies that have experienced high-temperature and moderate-pressure metamorphism...
12 KB (1,505 words) - 00:11, 17 June 2024
Walther's law of facies, or simply Walther's law, named after the geologist Johannes Walther, states that the vertical succession of facies reflects lateral...
7 KB (680 words) - 17:38, 8 February 2024
Gneiss (redirect from Metamorphic differentiation)
regional metamorphism that reaches the middle amphibolite to granulite metamorphic facies. In other words, the rock was metamorphosed at a temperature in excess...
19 KB (2,016 words) - 03:34, 18 September 2024
Pelite (section Barrovian facies series)
and early 1900s, George Barrow discovered the classic Barrovian-type metamorphic sequence in the southeastern Scottish Highlands. It represents a common...
6 KB (500 words) - 07:58, 22 August 2024
facies is a metamorphic facies typical of subseafloor alteration of the oceanic crust around mid-ocean ridge spreading centres. It is a metamorphic grade...
1 KB (131 words) - 05:01, 17 September 2023
Eclogitization is the tectonic process in which the high-pressure, metamorphic facies, eclogite (a very dense rock), is formed. This leads to an increase...
13 KB (1,467 words) - 07:08, 28 October 2022
They are dominated by calc-alkaline igneous rocks and high-T/low-P metamorphic facies series at high thermal gradients of >30 °C/km. There is a general...
38 KB (4,243 words) - 21:59, 13 August 2024
of the carbonate rock. Metamorphic rock naming can be based on protolith, mineral composition, texture, or metamorphic facies. Naming based on texture...
18 KB (1,885 words) - 20:05, 23 September 2024
low-grade metamorphic activity in pelitic rocks. Determining the "illite crystallinity index" allows geologists to designate what metamorphic facies and metamorphic...
10 KB (1,208 words) - 03:16, 7 June 2024
10 km. Each of these metamorphic facies is marked by the presence of a specific stable mineral assemblage, recording the metamorphic conditions undergone...
67 KB (8,251 words) - 14:22, 3 September 2024
Phyllite (category Metamorphic rocks)
classified as having formed through low-grade metamorphic conditions through regional metamorphism metamorphic facies. Phyllite has good fissility (a tendency...
3 KB (381 words) - 16:15, 15 February 2024
Blueschist (redirect from Glaucophane Schist Facies)
New Caledonia. Continued subduction of blueschist facies oceanic crust will produce eclogite facies assemblages in metamorphosed basalt (garnet + omphacitic...
8 KB (818 words) - 01:11, 4 January 2024
Pressure-temperature-time path (category Metamorphic petrology)
challenging. Metamorphic facies is a classification system first introduced by Pentti Eskola in 1920 to classify particular metamorphic mineral assemblages...
64 KB (6,779 words) - 16:42, 11 June 2024
gneisses. It is an indicator mineral of the prehnite-pumpellyite metamorphic facies. It was first described in 1788 for an occurrence in the Karoo dolerites...
6 KB (531 words) - 08:16, 19 May 2024
Wissahickon Formation (section Metamorphic grade)
high metamorphic grade. The metamorphic facies, which is described as lower to upper amphibolite facies, implies a moderate to high metamorphic temperature...
5 KB (419 words) - 12:43, 17 June 2023
Saint-Marcel, Aosta Valley, Italy. It occurs metamorphic rocks of the greenschist to amphibolite metamorphic facies and in low-temperature hydrothermal veins...
4 KB (169 words) - 03:47, 13 January 2024
Petrogenetic grid (category Metamorphic petrology)
prehnite-pumpellyite facies to the granulite facies, as well as the blueschist facies and eclogite facies at higher pressures and the contact hornfels facies at lower...
6 KB (683 words) - 00:33, 19 August 2023
basaltic and gabbroic rocks in metamorphic terranes. It is an indicator mineral of the prehnite-pumpellyite metamorphic facies. It is associated with chlorite...
4 KB (274 words) - 13:17, 13 August 2023
formation in the UK Greenschist, metamorphosed mafic volcanic rock and a metamorphic facies Elvan, a quartz-porphyry found in Cornwall, UK Greenstone, Ontario...
1 KB (219 words) - 10:19, 15 July 2023
Franciscan Complex (category Metamorphic complexes)
its name to the term describing high-pressure regional metamorphic facies, the Franciscan facies series. The Franciscan Complex is an assemblage of metamorphosed...
25 KB (2,574 words) - 00:40, 15 September 2024
hydrothermal vein deposits, and forms part of the typical greenschist metamorphic facies for rocks of originally basaltic composition. Minerals that albite...
7 KB (561 words) - 16:13, 8 July 2024