What does schistose mean?

What does schistose mean?

: of or relating to schist : having the character or structure of a schist.

What is schistose rock?

Schist is medium grade metamorphic rock, formed by the metamorphosis of mudstone / shale, or some types of igneous rock, to a higher degree than slate, i.e. it has been subjected to higher temperatures and pressures. These larger crystals reflect light so that schist often has a high lustre, i.e. it is shiny.

What does slaty foliation mean?

Slaty Foliation Slate is a fine-grained, foliated metamorphic rock that is physically and chemically changed (mineral grains changed directions) through by the alteration of shale or mudstone by low-grade regional metamorphism. (

What are the 3 types of foliation?

There are three types of foliated rocks: slate, schist, and gneiss. Each type varies based on the size of the mineral grain and how foliation is characterized.

Which rock shows schistose structure?

Rocks like crush breccia, mylonite and slate show this type of structure. Explanation: The rock with schistose structure is made up of broadly parallel or sub-parallel layers or bands of flaky, platy or rod-like minerals making it very weak in the direction of parallelism.

What is slaty cleavage in geology?

Slaty cleavage is a pervasive, parallel foliation (layering) of fine-grained platy minerals (chlorite) in a direction perpendicular to the direction of maximum stress. The process produces the rocks slate and phyllite. They represent slaty cleavage, developed when the rock was compressed and folded.

What is lineation in geography?

A lineation is any linear feature or element in a rock , and can occur as the product of tectonic, mineralogical, sedimentary, or geomorphic processes. The spatial orientation of a lineation is described by two angles known as bearing and plunge. …

What is schistose texture?

schistosity, mode of foliation that occurs in certain metamorphic rocks as a consequence of the parallel alignment of platy and lath-shaped mineral constituents. It reflects a considerable intensity of metamorphism—i.e., changes resulting from high temperatures, pressures, and deformation.

What is foliation geography?

Foliation in geology refers to repetitive layering in metamorphic rocks. Each layer can be as thin as a sheet of paper, or over a meter in thickness. The word comes from the Latin folium, meaning “leaf”, and refers to the sheet-like planar structure.

What are the 4 types of foliation?

The various types of foliated metamorphic rocks, listed in order of the grade or intensity of metamorphism and the type of foliation are slate, phyllite, schist, and gneiss (Figure 7.8).

What is foliation Class 9?

Ans: Foliation is the planar arrangement of the structure and texture of different layers within a rock. This arrangement is reached largely under the influence of shear forces/differential pressures on different sections of the rock and the orientation of the minerals present within the rock.

How would you describe foliation in metamorphic rocks?

Foliation in geology refers to repetitive layering in metamorphic rocks. Each layer can be as thin as a sheet of paper, or over a meter in thickness. Rocks exhibiting foliation include the standard sequence formed by the prograde metamorphism of mudrocks; slate, phyllite, schist and gneiss.