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Volcanoes A Lesson Plan Written By Tom Huettl

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Page 1: Volcanoes A Lesson Plan Written By Tom Huettl Lecture Outline »Areas of Volcanism »Types of Volcanoes »Types of Lava »Viscosity

Volcanoes

A Lesson Plan Written By

Tom Huettl

Page 2: Volcanoes A Lesson Plan Written By Tom Huettl Lecture Outline »Areas of Volcanism »Types of Volcanoes »Types of Lava »Viscosity
Page 3: Volcanoes A Lesson Plan Written By Tom Huettl Lecture Outline »Areas of Volcanism »Types of Volcanoes »Types of Lava »Viscosity

Lecture Outline

» Areas of Volcanism

» Types of Volcanoes

» Types of Lava

» Viscosity

Page 4: Volcanoes A Lesson Plan Written By Tom Huettl Lecture Outline »Areas of Volcanism »Types of Volcanoes »Types of Lava »Viscosity

Lecture Outline

» Areas of Volcanism

» Types of Volcanoes

» Types of Lava

» Viscosity

Page 5: Volcanoes A Lesson Plan Written By Tom Huettl Lecture Outline »Areas of Volcanism »Types of Volcanoes »Types of Lava »Viscosity

Areas of Volcanism

Sub-ducting Boundaries• Plate Sub-ducts below surface into mantle

•

Oceanic-Oceanic• Volcanoes form near boundary

•

Mid Ocean Ridges• Eruptions occur where plates are diverging

•

Page 6: Volcanoes A Lesson Plan Written By Tom Huettl Lecture Outline »Areas of Volcanism »Types of Volcanoes »Types of Lava »Viscosity

Cont.-Cont/ Subducting

Graphic taken from

: http://147.205.15.81/geology/work/VFT-so-far/orogeny/pl.tect.html

http://147.205.15.81/geology/work/VFT-so-far/orogeny/pl.tect.html
Page 7: Volcanoes A Lesson Plan Written By Tom Huettl Lecture Outline »Areas of Volcanism »Types of Volcanoes »Types of Lava »Viscosity

Oceanic-Oceanic/Suducting

Graphic taken from:

http://147.205.15.81/geology/work/VFT-so -far/orogeny/pl.tect.html

http://147.205.15.81/geology/work/VFT-so%20-far/orogeny/pl.tect.html
Page 8: Volcanoes A Lesson Plan Written By Tom Huettl Lecture Outline »Areas of Volcanism »Types of Volcanoes »Types of Lava »Viscosity

Mid Ocean Ridges

Page 9: Volcanoes A Lesson Plan Written By Tom Huettl Lecture Outline »Areas of Volcanism »Types of Volcanoes »Types of Lava »Viscosity

Areas of Volcanism

– Hot Spots

• Hot Spots remain stationary while plates move above

•

Page 10: Volcanoes A Lesson Plan Written By Tom Huettl Lecture Outline »Areas of Volcanism »Types of Volcanoes »Types of Lava »Viscosity

Hot Spots

Graphic taken from:

http://volcano.und.nodak.edu/vwdocs/vw/lessons/atg.htm

l

http://volcano.und.nodak.edu/vwdocs/vw/lessons/atg.htm
Page 11: Volcanoes A Lesson Plan Written By Tom Huettl Lecture Outline »Areas of Volcanism »Types of Volcanoes »Types of Lava »Viscosity

Types of Volcanoes

– Shield Cone• Has a low rounded profile

• Gentle slopes of 2-10 degrees

•

– Composite Volcano (Strato Volcano)• Both pyroclastic layers and lava flows

• Steep sided near summit with decreasing slope

•

Page 12: Volcanoes A Lesson Plan Written By Tom Huettl Lecture Outline »Areas of Volcanism »Types of Volcanoes »Types of Lava »Viscosity

Types of Volcanoes

• Cinder Cone– Pyroclastic Material (Fragmented material that has been

explosively ejected)

– Ash and debris accumulates around the vent

– Small steep sided cones

–

Page 13: Volcanoes A Lesson Plan Written By Tom Huettl Lecture Outline »Areas of Volcanism »Types of Volcanoes »Types of Lava »Viscosity

Shield Cone

Page 14: Volcanoes A Lesson Plan Written By Tom Huettl Lecture Outline »Areas of Volcanism »Types of Volcanoes »Types of Lava »Viscosity

Composite Cone/Stratovolcano

Page 15: Volcanoes A Lesson Plan Written By Tom Huettl Lecture Outline »Areas of Volcanism »Types of Volcanoes »Types of Lava »Viscosity

Cinder Cone

Page 16: Volcanoes A Lesson Plan Written By Tom Huettl Lecture Outline »Areas of Volcanism »Types of Volcanoes »Types of Lava »Viscosity

Types of Lava

• Mafic» Silica Poor (45-52%)

• Intermediate» Silica Composition (53-65%)

• Felsic» Contains more than 65% Silica

Page 17: Volcanoes A Lesson Plan Written By Tom Huettl Lecture Outline »Areas of Volcanism »Types of Volcanoes »Types of Lava »Viscosity

– High Viscosity

» Slow Flow

» High Silica Content

»

– Low Viscosity

» Fast Flow

» Low Silica Content

»

UMD

Page 18: Volcanoes A Lesson Plan Written By Tom Huettl Lecture Outline »Areas of Volcanism »Types of Volcanoes »Types of Lava »Viscosity
Page 19: Volcanoes A Lesson Plan Written By Tom Huettl Lecture Outline »Areas of Volcanism »Types of Volcanoes »Types of Lava »Viscosity
Page 20: Volcanoes A Lesson Plan Written By Tom Huettl Lecture Outline »Areas of Volcanism »Types of Volcanoes »Types of Lava »Viscosity

For More Information Visit One of The Following Links

The Web's Premiere Source For Volcanoes

U.S. Geological Survey, Volcano Hazards Program

Page 21: Volcanoes A Lesson Plan Written By Tom Huettl Lecture Outline »Areas of Volcanism »Types of Volcanoes »Types of Lava »Viscosity

Electronic Resources

• http://147.205.15.81/geology/work/VFT-so-far/orogeny/pl.tect.html

• http://volocano.und.nodak.edu/vwdocs/vwlessons/atg.html

• http://www.studyworksonline.com/cda/content/worksheet/0,1036,EXP950_NAV2-77_SWK953,00.html

• http://observe.ivv.nasa/earth/tectonics/Tectonics.html

• http://members.aol.com/waponi/sound.htm

• http://www.bftr.com/Pages/projects/dante.html

• http://volcanoes.usgs.gov/

http://147.205.15.81/geology/work/VFT-so-far/orogeny/pl.tect.html
http://volocano.und.nodak.edu/vwdocs/vwlessons/atg.html

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