[Answer] Which of the following rocks may be associated with contact metamorphism?A) gneiss B) slate C) hornfels D) B and C E) none of the above

Answer: D) B and C ??
Which of the following rocks may be associated with contact metamorphism?A) gneiss B) slate C) hornfels D) B and C E) none of the above

Metamorphism is the change of minerals or geologic texture (distinct arrangement of minerals) in pre-existing rocks () without the protolith melting into liquid magma (a solid-state change). The change occurs primarily due to heat pressure and the introduction of chemically active fluids. The chemical components and crystal structures of the minerals making up the rock may …

Metamorphic rocks arise from the transformation of existing rock to new types of rock in a process called metamorphism .The original rock is subjected to temperatures greater than 150 to 200 ° C (300 to 400 °F) and often elevated pressure (100 megapascals …

Glossary of geology – Wikipedia

Metamorphic rock – Wikipedia

Metamorphic rocks arise from the transformation of existing rock types in a process called metamorphism which means “change in form”. The original rock is subjected to heat (temperatures greater than 150 to 200 ° C ) and pressure (100 megapascals (1 000 bar) or more) causing profound physical or chemical change.The protolith may be a sedimentary igneous or existing metamorphic rock.

Hornfels is the group name for a set of contact metamorphic rocks that have been baked and hardened by the heat of intrusive igneous masses and have been rendered massive hard splintery and in some cases exceedingly tough and durable. These properties are due to fine grained non-aligned crystals with platy or prismatic habits characteristic of metamorphism at high temperature but without …

In the igneous environment metasomatism creates skarns greisen and may affect hornfels in the contact metamorphic aureole adjacent to an intrusive rock mass. In the metamorphic environment metasomatism is created by mass transfer from a volume of metamorphic rock at higher stress and temperature into a zone with lower st…

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