Earthquakes, Plate Tectonics, and Volcanos Earth Science Chapters 8 - 10.
Volcanos
-
Upload
maria-loredo -
Category
Technology
-
view
1.128 -
download
0
Transcript of Volcanos
![Page 1: Volcanos](https://reader035.fdocuments.in/reader035/viewer/2022070316/556157c4d8b42aa20d8b54c8/html5/thumbnails/1.jpg)
Introduction to Introduction to VolcanologyVolcanology
November 2009November 2009
![Page 2: Volcanos](https://reader035.fdocuments.in/reader035/viewer/2022070316/556157c4d8b42aa20d8b54c8/html5/thumbnails/2.jpg)
ContentContent1.- Volcano.
Concept. Origin. Parts. Earthquakes, tsunamis and volcanoes. Volcanology.Volcanism.
![Page 3: Volcanos](https://reader035.fdocuments.in/reader035/viewer/2022070316/556157c4d8b42aa20d8b54c8/html5/thumbnails/3.jpg)
VolcanoVolcano
An opening in the earth’s surface through which lava, hot gases, and
rock fragments erupt.
![Page 4: Volcanos](https://reader035.fdocuments.in/reader035/viewer/2022070316/556157c4d8b42aa20d8b54c8/html5/thumbnails/4.jpg)
Origin of VolcanosOrigin of Volcanos1.- Magma 50-100 miles below the earth’s surface slowly begins to rise to the
surface.
2.- As the magma rises it melts gaps in the surrounding rock.
3.- As more magma rises a large reservoir forms as close as 2 miles below the surface (magma chamber)
4.- Pressure from the surrounding rock causes the magma to blast or melt a conduit (channel) to the surface where magma erupts onto the surface through a vent (opening).
5.- The magma, now called lava, builds up at the vent forming a volcano.
6.- Often the volcano sides will be higher than the vent forming a depression called a crater
![Page 5: Volcanos](https://reader035.fdocuments.in/reader035/viewer/2022070316/556157c4d8b42aa20d8b54c8/html5/thumbnails/5.jpg)
VolcanoVolcano
Mount Saint Helen Eruption, May 18th 1980
![Page 6: Volcanos](https://reader035.fdocuments.in/reader035/viewer/2022070316/556157c4d8b42aa20d8b54c8/html5/thumbnails/6.jpg)
Magma chamber
conduitmantle
Parasitic Cone
Ash Cloud/Gases
Vent
Lava Flow
Crater
Parts of a VolcanoParts of a Volcano
![Page 7: Volcanos](https://reader035.fdocuments.in/reader035/viewer/2022070316/556157c4d8b42aa20d8b54c8/html5/thumbnails/7.jpg)
““Ring of Fire”Ring of Fire”
Volcanic arcs and oceanic trenches partly encircling the Pacific Basin form the so-called , a zone of frequent earthquakes and volcanic eruptions.
![Page 8: Volcanos](https://reader035.fdocuments.in/reader035/viewer/2022070316/556157c4d8b42aa20d8b54c8/html5/thumbnails/8.jpg)
Volcanoes and earthquakesThe distribution of earthquakes provides information about magma pathways and the structure of volcanoes and they
also can have a lot to do with generating tsunami. Any time that you can somehow displace a large amount of ocean water you generate a large wave or group of waves that
goes rushing across the ocean at great speed.
![Page 9: Volcanos](https://reader035.fdocuments.in/reader035/viewer/2022070316/556157c4d8b42aa20d8b54c8/html5/thumbnails/9.jpg)
VolcanologyVolcanology
Volcanology (also spelled vulcanology) is the branch of
geology that studies volcanoes, lava, magma and related geological phenomena.
![Page 10: Volcanos](https://reader035.fdocuments.in/reader035/viewer/2022070316/556157c4d8b42aa20d8b54c8/html5/thumbnails/10.jpg)
VolcanismVolcanism
Volcanism is part of the process of bringing material from the deep interior of a planet and spilling it forth on the surface. In many
cases, eruptions build up a piled of material, a
mountain what is called volcano.
![Page 11: Volcanos](https://reader035.fdocuments.in/reader035/viewer/2022070316/556157c4d8b42aa20d8b54c8/html5/thumbnails/11.jpg)
Heat SourceHeat Source
The heat from a volcano comes from deep within the earth.
Many miles underground, the earth is hot. Rocks beneath the earth are so hot they turn into
a liquid called lava.
When a volcano erupts, the steam and ash is caused by lava that is forcing its way toward the surface of the
earth.