Metamorphic Processes and Properties

The video explains metamorphic processes around igneous intrusions, focusing on contact metamorphism. It describes the concept of a metamorphic oriole and factors affecting its size, such as intrusion size, heat, and volatiles. The video concludes with a summary of changes in rock texture and composition due to these processes.

What is the primary agent of change in contact metamorphism?

• Heat

• Water

• Pressure

• Time

Where on the pressure-temperature graph do sedimentary processes occur?

• Top right corner

• Bottom left corner

• Top left corner

• Bottom right corner

What is a metamorphic Oriole?

• A type of igneous rock

• A volcanic eruption

• A zone of rock around a pluton showing metamorphism

• A type of sedimentary structure

What is the relationship between the size of a pluton and the width of its Oriole?

• Directly proportional

• Inversely proportional

• No relationship

• Depends on the color of the pluton

Which factor does NOT affect the size of a metamorphic Oriole?

• Presence of volatiles

• Color of the rock

• Size of the intrusion

• Thermal conductivity

How does high porosity and permeability affect the width of an Oriole?

• It narrows the Oriole

• It widens the Oriole

• It has no effect

• It changes the color of the Oriole

Which type of magma is typically hotter, mafic or silicic?

• Neither, they are both cold

• Both are the same

• Silicic

• Mafic

What is the significance of volatiles in the formation of a metamorphic Oriole?

• They make the Oriole colorful

• They spread heat further

• They have no effect

• They cool the pluton

What happens to the heat as you move away from the contact between igneous and country rock?

• It remains constant

• It increases

• It decreases

• It fluctuates

What is the effect of heat on sedimentary structures in a metamorphic Oriole?

• They are destroyed

• They turn into igneous structures

• They remain unchanged

• They become more pronounced