What are some examples of contact metamorphism?
Contact metamorphism produces non-foliated (rocks without any cleavage) rocks such as marble, quartzite, and hornfels.
Why is contact metamorphism is called contact metamorphism?
Contact metamorphism is the name given to the changes that take place when magma is injected in the surrounding solid rock (country rock). The changes that occur are greatest wherever the magma comes into contact with the rock because the temperatures are highest at this boundary and decrease with distance from it.
What is contact metamorphism quizlet?
Contact metamorphism occurs when the country rock is affected by heat from an intrusion. Igneous bodies are intrude at relatively shallow depth so contact metamorphism is described as high temperature, low pressure metamorphism. High temperatures lead to recrystallised, unfoliated rocks in an aureole.
How is contact metamorphism created?
Contact metamorphism occurs due to heating, with or without burial, of rocks that lie close to a magma intrusion. It is characterized by low P/T gradients, as strong thermal gradients between an intruding magma and adjacent country rock are best established at shallow crustal levels.
How are contact metamorphic rocks formed?
Contact metamorphic rocks form when rocks are heated to high temperatures, usually through contact with an igneous intrusion at a relatively low pressure. The effects of contact metamorphism usually only extend for a short distance from the cooling igneous rock that is providing the heat.
What causes contact metamorphism in rocks?
Where does contact metamorphism occur?
Contact metamorphism occurs in the vicinity of an igneous intrusive rock as a result of thermal effects of the hot magma.
What are the main factors of contact metamorphism?