Natural Hazards and Disasters 5th Edition Hyndman Solutions Manual all chapter instant download
Natural Hazards and Disasters 5th Edition Hyndman Solutions Manual all chapter instant download
Natural Hazards and Disasters 5th Edition Hyndman Solutions Manual all chapter instant download
com
https://testbankfan.com/product/natural-hazards-and-
disasters-5th-edition-hyndman-solutions-manual/
OR CLICK BUTTON
DOWLOAD EBOOK
https://testbankfan.com/product/natural-hazards-and-
disasters-5th-edition-hyndman-test-bank/
https://testbankfan.com/product/natural-hazards-and-
disasters-4th-edition-hyndman-solutions-manual/
https://testbankfan.com/product/natural-hazards-and-
disasters-4th-edition-hyndman-test-bank/
https://testbankfan.com/product/natural-disasters-10th-edition-
abbott-solutions-manual/
Natural Disasters Canadian 4th Edition Abbott Solutions
Manual
https://testbankfan.com/product/natural-disasters-canadian-4th-
edition-abbott-solutions-manual/
https://testbankfan.com/product/natural-hazards-4th-edition-
keller-test-bank/
https://testbankfan.com/product/natural-disasters-10th-edition-
abbott-test-bank/
https://testbankfan.com/product/natural-disasters-9th-edition-
abbott-test-bank/
https://testbankfan.com/product/natural-hazards-canadian-3rd-
edition-keller-test-bank/
Instructor’s Manual Chapter 6
Natural Hazards and Disasters, 5e Volcanoes: Tectonic Environments and Eruptions
Chapter 6
VOLCANOES: TECTONIC ENVIRONMENTS AND ERUPTIONS
CHAPTER OUTLINE
I. Introduction to Volcanoes: Generation of Magmas
A. Magma Properties and Volcanic Behavior
1. Viscosity
a. Basalt
b. Rhyolite
c. Andesite
2. Volatiles
3. Volume
© 2017 Cengage Learning. All Righ Reserved. May not be scanned, copied or duplicated, or posted to a publicly
accessible website, in whole or in part.
Instructor’s Manual Chapter 6
Natural Hazards and Disasters, 5e Volcanoes: Tectonic Environments and Eruptions
A. Shield Volcanoes
1. Mauna Loa and Kilauea: Basalt Giants Over an Oceanic Hotspot
a. Rift Zones
2. Case in Point: Kilauea’s East Rift Eruptions Continue
3. Mount Etna, Sicily
B. Cinder Cones
C. Stratovolcanoes
D. Lava Domes
E. Giant Continental Calderas
1. Case in Point: Future Eruptions of a Giant Caldera Volcano—Yellowstone Volcano,
Wyoming
2. Resurgent Dome
KEY TERMS
aa phreatic eruptions
andesite pillow basalt
basalt Plinian eruption
caldera pyroclastic flow
cinder cone pyroclastic material
continental caldera resurgent dome
crater rhyolite
flood basalt rift zones
hotspot volcano shield volcano
lahar stratovolcano
lava strombolian eruption
lava dome viscosity
lava flow volatiles
magma volcanic ash
magma chamber volcanic explosivity index (VEI)
melting temperature volcano
pahoehoe vulcanian eruption
peléan eruption
KEY POINTS
1. Introduction to Volcanoes: Generation of Magmas
A hot rock deep within the Earth may melt by increased temperature, decreased pressure,
or addition of water. By the Numbers 6-1.
The violence of a volcanic eruption depends on the magma’s viscosity, volatiles, and
volume.
The viscosity of a magma is largely controlled by the silica content, with high-silica
magmas (rhyolite) having higher viscosity than low-silica magmas (basalt).
A volcanic eruption is likely to be more explosive for magmas with higher viscosity and
larger quantities of volatiles, especially water. TABLE 6-1.
2. Tectonic Environments of Volcanoes
© 2017 Cengage Learning. All Righ Reserved. May not be scanned, copied or duplicated, or posted to a publicly
accessible website, in whole or in part.
Instructor’s Manual Chapter 6
Natural Hazards and Disasters, 5e Volcanoes: Tectonic Environments and Eruptions
The tectonic environment dictates the volcano distribution, type, composition, and
behavior.
Most hazardous volcanoes are near subduction zones, and most of the remainder occur at
spreading centers.
Volcanoes that are not near plate boundaries are generally over hotspots.
3. Volcanic Eruptions and Products
Basaltic magma commonly produces nonexplosive eruptions, spilling out in the form of
lava. Types of lava include ropy pahoehoe and rubbly aa. FIGURE 6-7.
Explosive eruptions produce pyroclastic material, solidified magma in the form of ash.
Ash may rain down or be carried by the wind, or it may flow down a volcano flank in the
form of a pyroclastic flow. Hot ash may combine with rain or melting snow to produce a
lahar, or mudflow. FIGURE 6-8.
The size of an explosive eruption depends on the amount of magma, the magma
viscosity, and its water-vapor content.
4. Types of Volcanoes
Shield volcanoes are characterized by gently sloping sides and are typically segmented
into rifts zones. FIGURES 6-10 and 6-11.
Cinder cones are characterized by their small size and steep sides. Erupting cinder cones
produce glowing fragments of cinders that rarely cause serious injury. FIGURES 6-14
and 6-16.
Stratovolcanoes have the classic volcano shape and moderate to high volatile content.
FIGURE 6-19.
As a lava dome rises and expands, lava fragments tumble down its sides while molten
lava continues to rise within the dome. If the dome collapses, it may release a pyroclastic
flow that can be extremely dangerous.
Continental calderas are formed when the roof over a giant magma chamber collapses.
Their infrequent eruptions produce huge volumes of pyroclastic material and are
extremely destructive. FIGURE 6-18.
LECTURE SUGGESTIONS
1. Discuss the various types of volcanoes and the characteristics of each type. How do they
differ from one another?
2. Discuss magma chemistry.
3. Have the students discuss the importance of volatility and viscosity.
4. Discuss famous historic volcanic eruptions.
5. Discuss the geographic distribution of volcanoes and why they occur at certain locations
across the globe.
© 2017 Cengage Learning. All Righ Reserved. May not be scanned, copied or duplicated, or posted to a publicly
accessible website, in whole or in part.
Instructor’s Manual Chapter 6
Natural Hazards and Disasters, 5e Volcanoes: Tectonic Environments and Eruptions
WEBSITES
http://hvo.wr.usgs.gov/
http://volcanoes.usgs.gov
http://volcanoes.usgs.gov/about/edu/index.php
http://volcanoes.usgs.gov/observatories/cvo/
http://www.avo.alaska.edu/
http://www.dartmouth.edu/~volcano/
http://www.geo.mtu.edu/volcanoes/
http://www.soest.hawaii.edu/GG/hcv.html
http://www.volcano.si.edu/
VIDEOS
Video: NOVA—Volcano!
Video: NOVA—In the Path of a Killer Volcano
Video: NOVA—Return to Mt. St. Helens
Video: In the Shadow of Vesuvius, National Geographic, 1989 (60 min). Excellent footage of
1944 eruption of Vesuvius and reconstruction of the events that destroyed Pompeii and
Herculaneum.
Video: USGS Library Special Collections, MS 955, 345 Middlefield Rd., Menlo Park, CA
94025, (415)329–5009.
Video: The Magma Chamber, BBC Horizon Series, 1987 (50 min). Osbour Court, Olney
Buckinghamshire, MK 46 4AG United Kingdom, Phone 0234-711198 or 713390. How
studies of magma at depth aid in the prediction of eruptions.
Video: Volcanoes of the United States. Gould Media, Inc., Mount Vernon, NY.
Video: Mount St. Helens: What Geologists Learned. Gould Media, Inc., Mount Vernon, NY.
Video: Earth Revealed #13: Volcanism. Annenberg/CPB Collection, P.O. Box 1922, Santa
Barbara, CA.
Video: Eruptive Phenomena of Kilauea’s East Zone. Geoscience Resources.
Video: Inside Hawaiian Volcanoes. Smithsonian Institution, NHB-119, Washington, DC 20560.
Video: Reducing Volcanic Risk. International Association of Volcanology and Chemistry of the
Earth’s Interior.
Nature: Catastrophe on Sakhalin
REFERENCES
Carey, S., H. Sigurdsson, and C. Mandeville, 1992, Fire and Water at Krakatau: Earth, Vol. 1,
No. 2 (1983 eruption).
Carey, S., H. Sigurdsson, C. Mandeville, and S. Bronto, 2000, Volcanic Hazards from
Pyroclastic Flow Discharge into the Sea: Examples from the 1883 Eruption of Krakatau,
Indonesia: pp. 1–14 in McCoy, F.W. and G. Heiken, editors, Volcanic Hazards and Disasters
in Human Antiquity: Geological Society of America Special Paper 345.
Crandell, D.R. and D.R. Nichols, 1987, Volcanic Hazards at Mt. Shasta: U.S. Geological Survey.
Decker, R. and B. Decker, 1989, Volcanoes: W.H. Freeman and Co., New York, 285 p.
Ewert, J.W. and D.A. Swanson, 1992, Monitoring Volcanoes—Techniques and Strategies Used
by the Staff of the Cascades Volcano Observatory, 1980–1990: U.S. Geological Survey
© 2017 Cengage Learning. All Righ Reserved. May not be scanned, copied or duplicated, or posted to a publicly
accessible website, in whole or in part.
Instructor’s Manual Chapter 6
Natural Hazards and Disasters, 5e Volcanoes: Tectonic Environments and Eruptions
© 2017 Cengage Learning. All Righ Reserved. May not be scanned, copied or duplicated, or posted to a publicly
accessible website, in whole or in part.
Instructor’s Manual Chapter 6
Natural Hazards and Disasters, 5e Volcanoes: Tectonic Environments and Eruptions
ANSWER: Steam.
6. How does pahoehoe lava differ from aa lava?
ANSWER: Pahoehoe is ropy-looking; aa is clinkery.
7. On a huge shield volcano, such as Mauna Loa, what is the main type of eruptive site? Where
on the volcano is (or are) such a site (or sites)?
ANSWER: Eruptions produce basalt lava flows that build the main visible mass of the
volcano.
8. Yellowstone Park has two huge calderas, each more than 20 kilometers across. How do such
calderas form?
ANSWER: Ejection of a large volume of magma often causes collapse into the magma
chamber.
9. How is a caldera different from a crater?
ANSWER: The distinction between a crater and a caldera is not so much size but rather the
mechanism of formation of the depression. A cinder cone would blow out vent material to
form a crater. A giant Plinian eruption would collapse into the emptying magma chamber to
form a caldera.
10. Why do shield volcanoes have such a different shape than stratovolcanoes?
ANSWER: Shield volcanoes are continuous basalt eruptions of very fluid basalt lavas within
a small area that eventually build a gently-sloping pile of thin flows. The flows are
characterized by their low viscosity, low volatile content, broad and gently sloping sides, and
large to giant volumes. The stratovolcanoes have moderate volume and size, moderate
viscosity and slope, and moderate-to-high volatile content. The magma of the stratovolcano
has moderate viscosity, so lavas are not especially fluid. They flow only on moderately steep
slopes before they cool and solidify. Escape of the dissolved volatiles through the viscous
magma typically causes large eruptions of ash and broken rubble that concentrate near the
vent and tumble to form slopes of about 30 degrees; they build the cone higher near the vent.
11. What is the driving force behind the explosive activity of a cinder cone? Where does it come
from?
ANSWER: They erupt where rising basaltic magma encounters near-surface groundwater,
and escaping steam coughs cinders of bubbly molten lava out of the vent or summit crater.
12. How does dacite or rhyolite magma form in a line of arc volcanoes, such as the Cascades?
ANSWER: The newly formed basalt magma rises into the continental crust, heats it, and
partly melts it with the little available water to form granite (rhyolite) magma.
13. Why do the Hawaiian Islands form a chain of volcanoes?
ANSWER: A stationary hotspot from deep within the mantle erupts to produce a shield
volcano. As the lithospheric plate moves the active volcano off of the hot spot, the volcano
becomes extinct, and a new volcanic island forms resulting in a chain of volcanoes in the
Hawaiian Islands.
© 2017 Cengage Learning. All Righ Reserved. May not be scanned, copied or duplicated, or posted to a publicly
accessible website, in whole or in part.
Instructor’s Manual Chapter 6
Natural Hazards and Disasters, 5e Volcanoes: Tectonic Environments and Eruptions
14. On what types of plate boundaries are volcanoes typically found? Explain how these tectonic
environments give rise to volcanoes.
ANSWER: Volcanoes are typically found on spreading zones, subduction zones, or hot
spots. These areas typically have lots of changes in temperature, pressure, or water content,
which allows rocks to melt and volcanoes to form.
1. b
2. c
© 2017 Cengage Learning. All Righ Reserved. May not be scanned, copied or duplicated, or posted to a publicly
accessible website, in whole or in part.
Another random document with
no related content on Scribd:
the alleged originals will, for the most part, not bear the light of
criticism. Johnson did not scruple to call Macpherson an impostor.
That there was an Ossian is probable, but the few poems which can
with tolerable safety be assigned to him belong to a much later date
than Macpherson claimed. Nevertheless, though Macpherson’s Ossian
may be as great an imposture as Chatterton’s Rowley Poems, he, no
doubt, did gather from the Celtic fragments and the Celtic folklore a
mass of imagery and fire of words, which came in most fitting time to
lend some help in ridding the weary world of the stereotyped
coldnesses of the followers of Pope.
Naevius, 78.
Nash, Thomas; Jack Wilton, 224.
Nennius, 248.
Nepos, Cornelius, 99, 134.
Newman, Cardinal, 41, 254.
Nibelungen Lied, the, 125, 232, 235, 236.
Niebuhr, Bartholet George, 245.
North, Sir Thomas; translation of Plutarch, 33, 52, 58.
Sacchetti, 195.
Sachs, Hans, 232, 237.
Sackville, Thomas, Earl of Dorset, 111, 160, 177, 214.
St. Amant, 160.
Saint-Evremond, 174.
Saint-Gelais, 157, 192.
St. Pierre, Bernadin de; Paul et Virginie, 175, 177.
Ste. Beuve, Charles Augustin, 177.
Sallust, 75, 99, 100, 107.
Sannazaro, 5, 25, 55, 89, 204, 205, 213;
Arcadia, 205, 221.
Sappho, 16, 45, 46, 54, 72, 107.
Sardou, Victorien, 77, 177.
Scarron, Paul, 173, 224.
Schelling, Friedrich von, 244.
Schiller, Friedrich, 10, 108, 231, 233, 240-242;
Robbers, 240;
Song of the Bell, 242;
Wallenstein, 241, 242;
Wilhelm Tell, 242.
Schlegel, A. W. and Friedrich von, 245.
Schopenhauer, Arthur, 231, 244.
Scott, Sir Walter, 160;
translation of Goethe’s Götz, 246.
Scudéry, Mademoiselle de, 132, 172, 222, 250;
Clélie, 173;
Grand Cyrus, 173.
Sedley, Sir Charles, 160.
Seneca the Elder, 98.
Seneca the Younger, 71, 72, 75, 76, 78, 79, 102, 103, 107, 111,
112, 161, 166, 198, 209;
Moral Epistles, 103.
Ser Giovanni; Pecorone, 211.
Seven Sages, the, 195.
Seven Wise Masters, the, 133.
Sévigné, Madame de, 105, 173.
Shakespeare, William, 7, 20, 24, 50, 51, 52, 59, 76, 161, 166-
170, 184, 185, 193, 211, 215, 220, 227, 232, 234, 243,
245;
Antony and Cleopatra, 58;
Comedy of Errors, 77;