05-11-2023-0342 - metamorphic complexes, geology, fault, bedrock, slaking, anomaly, natural, artificial, material, rock, clastic, schist, tectonite, deformed, etc. (draft)

Pages in category "Metamorphic complexes"

The following 16 pages are in this category, out of 16 total. This list may not reflect recent changes.

B

• Bahía Mansa Metamorphic Complex
• Belén Metamorphic Complex

C

• Chañaral Epimetamorphic Complex
• Choapa Metamorphic Complex
• Chonos Metamorphic Complex
• Cordillera Darwin Metamorphic Complex

E

• Eastern Andes Metamorphic Complex

F

• Franciscan Complex

M

• Mejillones Metamorphic Complex
• Metamorphic core complex

N

• Northern Snake Range metamorphic core complex

P

• Puerto Edén Igneous and Metamorphic Complex
• Punta de Choros Metamorphic Complex

Q

• Quebrada del Carrizo Metamorphic Complex

T

• Tierra del Fuego Igneous and Metamorphic Complex

V

• Vishnu Basement Rocks

https://en.wikipedia.org/wiki/Category:Metamorphic_complexes

https://en.wikipedia.org/wiki/Environmental_geology

https://en.wikipedia.org/wiki/Geological_Museum_(disambiguation)

https://en.wikipedia.org/wiki/Fault_(geology)

https://en.wikipedia.org/wiki/Bedrock

https://en.wikipedia.org/wiki/Slaking_(geology)

https://en.wikipedia.org/wiki/Baltic_Sea_anomaly

https://en.wikipedia.org/wiki/Rock_(geology)

https://en.wikipedia.org/wiki/Geology

https://en.wikipedia.org/wiki/Natural_environment

https://en.wikipedia.org/wiki/Artificiality

https://en.wikipedia.org/wiki/Category:Artificial_materials

https://en.wikipedia.org/wiki/Category:Metamorphic_rocks

https://en.wikipedia.org/wiki/Clastic_rock

https://en.wikipedia.org/wiki/Schist

 

Tectonites are metamorphic or tectonically deformed rocks whose fabric reflects the history of their deformation, or rocks with fabric that clearly displays coordinated geometric features that indicate continuous solid (ductile) flow during formation. Planar foliation results from a parallel orientation of platey mineral phases such as the phyllosilicates or graphite. Slender prismatic crystals such as amphibole produce a lineation in which these prisms or columnar crystals become aligned.^[1] Tectonites are rocks with minerals that have been affected by natural forces of the earth, which allowed their orientations to change. This usually includes recrystallization of minerals, and the foliation formation. Tectonites are studied through structural analysis and allows for the determination of two things:^[2]

• The orientation of shearing and compressive stresses during (dynamic) metamorphism
• The later (or final) stages of metamorphism^[2]

According to the nature of mineral orientation, there are three main groups of tectonites, L-Tectonites, S-Tectonites, and LS-Tectonites. The different types reflect on the different ways that matter moves.

• L-Tectonites are aligned in a linear fabric, which allows the rock to split into rod-like shapes due to the two intersecting planes. The foliation of this type is not strong.
• S-Tectonites are the fabric that is dominantly a foliation fabric which allows the rock to split into plate-like sheets that are parallel to foliation. There are little to no linear fabrics within the foliation fabrics.
• LS-Tectonites is the perfect mix of the two, with both strong lineations and strong foliations. This is caused by the rotation of the grains around axes that are oriented along the trends of the folds.^[2]
  

Classification

• S-tectonites (from the German, Schiefer for schist) have a dominant planar fabric and may indicate a flattening type of strain. This may also be due to a lack of minerals capable of giving a lineation e.g. in a phyllonite.^[1]
• L-tectonites have a dominant linear fabric and generally indicate a constrictional type of strain. This may be due to a lack of platey phases.^[1]
• L-S tectonites have equally developed linear and planar fabric elements and may indicate a plane strain deformation. Many mylonites are L-S tectonites consistent with a simple shear deformation.
• L-Tectonites (Lineations) indicate Constrictional Strain
• S-Tectonites (Foliations) indicate Flattening Strain
• L-S Tectonites (Plain strain) indicate both elongation and flattening strain^[3]

 

https://en.wikipedia.org/wiki/Tectonite