What is the texture of hornfels?

What is the texture of hornfels?

Hornfels

Is hornfels fine textured?

Hornfels is a fine-textured metamorphic rock formed by contact metamorphism .

How do you identify hornfels?

Under a microscope the structure of hornfels is very distinctive, with small, generally equigranular, mineral grains fitting closely together like the fragments of a mosaic or a rough pavement. Texture – granular, platy or elongate crystals randomly oriented so no foliation evident.

Is hornfels used in architecture?

The primary use of hornfels is in architecture. The hard, interesting-looking stone may be used to make interior flooring and decorations as well as exterior facing, paving, curbing, and decorations. The rock is used in the construction industry to make road aggregate.

Are hornfels smooth?

Other features: Generally smooth to touch. Parent Rocks and Protoliths: Hornfels is not a rock that is “deposited”. Instead it is a rock type that forms when an existing rock is metamorphosed.

What is the grain size texture of hornfels?

Hornfeld is fine-grained, sometimes banded, but can also show a porphyroblastic texture. Hornfels is non-foliated, the grains showing no orientation. Mosaic structure of the mineral grains of nearly equal dimensions are characteristic.

What minerals is hornfels made of?

They consist of andalusite, garnet, and cordierite as major minerals and quartz, feldspar, biotite, muscovite, and pyroxene as a characteristic mineral. Hornfels often include epidote, diopside, actinolite, or wollastonite and sometimes Titanite, and tremolite.

What is hornfels rock used for?

The primary use of hornfels is in architecture and beautification of the residential and industrial building. The hard and attractive-looking hornfels often used to make interior flooring, as well as, exterior facing, paving, curbing, and decorations.

Is hornfels high or low grade?

Hornfels facies: low- to high-grade metamorphism. Zeolite facies: low-grade metamorphism. Greenschist facies: low-grade metamorphism. Amphibolite facies: medium-grade metamorphism.

What does hornfels feel like?

The term is derived from the German word Hornfels, meaning “hornstone”, because of its exceptional toughness and texture both reminiscent of animal horns. These rocks were referred to by miners in northern England as whetstones.

What kind of rock is hornfels?

metamorphic rocks
Hornfels is medium-to-coarse crystalline metamorphic rocks formed out of contact metamorphism, dark color, and rich in silicates with granoblastic and porphyroblastic texture.

Is Hornfel high grade?

Hornfels facies: low- to high-grade metamorphism. Zeolite facies: low-grade metamorphism. Greenschist facies: low-grade metamorphism.