review concepts on deformation and metamorphism n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Review Concepts on Deformation and Metamorphism PowerPoint Presentation
Download Presentation
Review Concepts on Deformation and Metamorphism

Loading in 2 Seconds...

play fullscreen
1 / 26

Review Concepts on Deformation and Metamorphism - PowerPoint PPT Presentation


  • 127 Views
  • Uploaded on

Review Concepts on Deformation and Metamorphism . Rock folding. Which statement regarding synclines is true? A. Limbs dip toward the axial plane where the oldest strata are exposed. B. Limbs dip toward the axial plane where the youngest strata are exposed.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Review Concepts on Deformation and Metamorphism' - tessa


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide2

Rock folding

Which statement regarding synclines is true?

A. Limbs dip toward the axial plane where the oldest strata are exposed.

B. Limbs dip toward the axial plane where the youngest strata are exposed.

C. Limbs dip away from the axial plane where the oldest strata are exposed.

D. Limbs dip away from the axial plane where the youngest strata are exposed.

slide3

Rock folding

Which statement regarding synclines is true?

A. Limbs dip toward the axial plane where the oldest strata are exposed.

B. Limbs dip toward the axial plane where the youngest strata are exposed.

C. Limbs dip away from the axial plane where the oldest strata are exposed.

D. Limbs dip away from the axial plane where the youngest strata are exposed.

slide4

Rock folding

What characterizes a fold as being a plunging fold?

A. The limbs dip at different angles from one another.

B. The limbs both dip in the same direction.

C. The axial plane is not vertical.

D. The fold axis is not horizontal.

slide5

Rock folding

What characterizes a fold as being a plunging fold?

A. The limbs dip at different angles from one another.

B. The limbs both dip in the same direction.

C. The axial plane is not vertical.

D. The fold axis is not horizontal.

faults
Faults
  • Faults are classified by:

A. Map pattern

B. Stress field

C. Age

D. Dip and relative motion

faults1
Faults
  • Faults are classified by:

A. Map pattern

B. Stress field

C. Age

D. Dip and relative motion

faults2
Faults

A normal Fault is characterized by

A. Tensional Stress

B. Steep Dip (>45o)

C. Hanging wall down relative to footwall

D. All of the above

faults3
Faults

A normal Fault is characterized by

A. Tensional Stress

B. Steep Dip (>45o)

C. Hanging wall down relative to footwall

D. All of the above

slide10

Regional

high-pressure

metamorphism

Regional

metamorphism

Shock

metamorphism

Contact

metamorphism

Regional

metamorphism

Depth,

km

Oceanic

crust

0

35

Continental crust

Oceanic

lithosphere

75

Continental mantle lithosphere

Asthenosphere

Water

Seafloor

metamorphism

Burial

metamorphism

slide11

The lithosphere and asthenosphere interact to metamorphose rock

Which kind of metamorphism is caused primarily by increasing temperature with little change in pressure?

A. Regional Metamorphism

B. Contact metamorphism

C. Burial Metamorphism

D. Subduction-zone metamorphism

slide12

The lithosphere and asthenosphere interact to metamorphose rock

Which kind of metamorphism is caused primarily by increasing temperature with little change in pressure?

A. Regional Metamorphism

B. Contact metamorphism

C. Burial Metamorphism

D. Subduction-zone metamorphism

slide13

The lithosphere and asthenosphere interact to metamorphose rock

High-pressure regional metamorphism is most closely associated with which tectonic environment?

A. Continental rifting

B. Mid-ocean ridge

C. Subduction zone

D. Meteorite impact

slide14

The lithosphere and asthenosphere interact to metamorphose rock

High-pressure regional metamorphism is most closely associated with which tectonic environment?

A. Continental rifting

B. Mid-ocean ridge

C. Subduction zone

D. Meteorite impact

slide15

The lithosphere and asthenosphere interact to metamorphose rock

Seafloor metamorphism that occurs at mid-ocean ridges is caused by:

A. Directed pressure

B. Confining pressure

C. Metasomatism

D. All of the above

slide16

The lithosphere and asthenosphere interact to metamorphose rock

Seafloor metamorphism that occurs at mid-ocean ridges is caused by:

A. Directed pressure

B. Confining pressure

C. Metasomatism

D. All of the above

slide17

Increasing intensity of metamorphism

Low grade

Intermediate grade

High grade

Increasing crystal size

Increasing coarseness of foliation

slide18

Diagenesis

Low grade

High grade

Intermediate

grade

Slate

Phyllite

Migmatite

Schist

(abundant

micaceous

minerals)

Gneiss

(fewer

micaceous

minerals)

Slaty cleavage

Schistosity

Banding

Banding

slide19

Index minerals define

metamorphic zones.

Isograds can be

used to plot the

degree of

metamorphism.

Canada

ME

NY

Isograds

VT

NH

Key:

MA

Not

metamorphosed

CT

Chlorite zone

Low

grade

RI

Biotite zone

Garnet zone

Medium

grade

Staurolite zone

Sillimanite zone

High grade

slide20

Degree of metamorphism

Diagenesis

Low

Intermediate

High

Greenschists

Amphibolites

Granulites

Chlorite

White mica (mainly muscovite)

Biotite

Garnet

Staurolite

Kyanite

Sillimanite

Albite (sodium plagioclase)

With increasing metamorphic

grade, mineral composition

changes.

Mineral suites define

metamorphic facies.

slide21

Texture, index minerals, grade, and facies describe metamorphism

How do crystal size and foliation change with increasing intensity of metamorphism?

A. Grain size increases and foliation becomes less coarse.

B. Grain size decreases and foliation becomes coarser.

C. Both grain size and foliation coarseness decrease.

D. Both grain size and foliation coarseness increase.

slide22

Texture, index minerals, grade, and facies describe metamorphism

How do crystal size and foliation change with increasing intensity of metamorphism?

A. Grain size increases and foliation becomes less coarse.

B. Grain size decreases and foliation becomes coarser.

C. Both grain size and foliation coarseness decrease.

D. Both grain size and foliation coarseness increase.

slide23

Texture, index minerals, grade, and facies describe metamorphism

Which list places foliation textures in order of increasing metamorphic grade (low grade to high grade)?

A. Slate, gneiss, phyllite, schist

B. Slate, phyllite, schist, gneiss

C. Gneiss, schist, slate, phyllite

D. Gneiss, phyllite, schist, slate

slide24

Texture, index minerals, grade, and facies describe metamorphism

Which list places foliation textures in order of increasing metamorphic grade (low grade to high grade)?

A. Slate, gneiss, phyllite, schist

B. Slate, phyllite, schist, gneiss

C. Gneiss, schist, slate, phyllite

D. Gneiss, phyllite, schist, slate

slide25

Texture, index minerals, grade, and facies describe metamorphism

Metamorphic facies are defined by:

A. Suites of minerals

B. Foliation textures

C. Pressures and temperatures

D. Tectonic environments

slide26

Texture, index minerals, grade, and facies describe metamorphism

Metamorphic facies are defined by:

A. Suites of minerals

B. Foliation textures

C. Pressures and temperatures

D. Tectonic environments