Question 1

What kind of rocks display contact metamorphism and how does it appear and differ from regional metamorphism?

Accepted Answer

Shales, basalts or dirty limestones.Larg

Question 2

About 1.2 to 1.0 billion years ago, Canada had a mountain range the size of the modern Himalayas, with high grade metamorphic rocks (>800° C)forming in its roots.Where was this located?

Accepted Answer

A) The Coast Mountains of B.C. 
B) The Canadian Rockies 
C) The Grenville Orogen stretching between Georgian Bay Ontario and Newfoundland 
D) The Trans Hudson Orogen of Saskatchewan and Manitoba 
A) The Coast Mountains of B.C. 
B) The Canadian Rockies 
C) The Grenville Orogen stretching between Georgian Bay Ontario and Newfoundland 
D) The Trans Hudson Orogen of Saskatchewan and Manitoba

Question 3

Why is the regional metamorphism of ocean crust in a subduction zone considered separately from regular regional metamorphism?

Accepted Answer

A) The ocean crust has no hydrous minerals to destroy or recrystallize. 
B) Both the basaltic composition and very low geothermal gradient (Low T, Hi P)are unique and lead to different facies than seen in continental rocks. 
C) Unlike regular regional metamorphism, this does not occur along plate margins. 
D) Because this setting does not involve any strain deformation. 
A) The ocean crust has no hydrous minerals to destroy or recrystallize. 
B) Both the basaltic composition and very low geothermal gradient (Low T, Hi P)are unique and lead to different facies than seen in continental rocks. 
C) Unlike regular regional metamorphism, this does not occur along plate margins. 
D) Because this setting does not involve any strain deformation.

What kind of rocks display contact metamorphism and how does it appear and differ from regional metamorphism?

About 1.2 to 1.0 billion years ago, Canada had a mountain range the size of the modern Himalayas, with high grade metamorphic rocks (>800° C)forming in its roots.Where was this located?

Why is the regional metamorphism of ocean crust in a subduction zone considered separately from regular regional metamorphism?

An Introduction to Geology and Plate Tectonics

Minerals: The Building Blocks of Rocks

Igneous Rocks

Volcanoes and Volcanic Processes

Weathering and Soil

Sedimentary Rocks

Geologic Time

Crustal Deformation

Earthquakes and Earth's Interior

The Ocean Floor

Plate Tectonics: The Framework for Modern Geology

Mountain Building and Continental Frameworks

Mass Wasting: The Work of Gravity

Running Water

Groundwater

Glaciers and Glaciation

Deserts and Winds

Shorelines

Mineral and Energy Resources

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Exam 7: Metamorphism and Metamorphic Rocks

What kind of rocks display contact metamorphism and how does it appear and differ from regional metamorphism?

About 1.2 to 1.0 billion years ago, Canada had a mountain range the size of the modern Himalayas, with high grade metamorphic rocks (>800° C)forming in its roots.Where was this located?

Why is the regional metamorphism of ocean crust in a subduction zone considered separately from regular regional metamorphism?

An Introduction to Geology and Plate Tectonics

Minerals: The Building Blocks of Rocks

Igneous Rocks

Volcanoes and Volcanic Processes

Weathering and Soil

Sedimentary Rocks

Geologic Time

Crustal Deformation

Earthquakes and Earth's Interior

The Ocean Floor

Plate Tectonics: The Framework for Modern Geology

Mountain Building and Continental Frameworks

Mass Wasting: The Work of Gravity

Running Water

Groundwater

Glaciers and Glaciation

Deserts and Winds

Shorelines

Mineral and Energy Resources

Filters