{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Metamorphic Rocks

Metamorphic Rocks - Geology Metamorphic Rocks What are...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Metamorphic Rocks What are metamorphic rocks? Metamorphic rocks are rocks that have been changed in form and mineralogy from a protolyth, under conditions of increased pressure and/or heat, up to, but not including melting. What are the Agents of metamorphism? 1. Heat 2. Pressure 3. Fluids Tectonic Controls on Heat, Pressure, and Fluids • Subduction Zones • High Temp • High Pressure • Spreading centers • Moderate temp • Lo pressure • Hot Spots • Hi Temp • Lo Pressure Why do Rocks change under metamorphic Conditions? • Before Metamorphism • Country Rocks were in equilibrium • Pressure, temperature defined by depth • After Metamorphism • New environment • Starts metamorphic reactions How do rocks change under metamorphic conditions? • Sometimes NEW minerals form • Clays become mica • Sometimes minerals RE-CRYSTALIZE Geology Metamorphic Rocks Geology
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
• Limestone becomes marble • Sometimes rocks are DEFORMED • Squashed, folded What are the tectonic settings of metamorphism? • Regional • Andes-type mountain building • High Heat • High Pressure • Contact • Intense heat from magma chamber • Low pressure Heat as a Metamorphic Agent
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 5

Metamorphic Rocks - Geology Metamorphic Rocks What are...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon bookmark
Ask a homework question - tutors are online