View
4
Download
0
Category
Preview:
Citation preview
Volcanoes
Volcanoes• There are two main types of volcano:
― Shield volcanoes― Composite/ stratovolcanoes
Volcano Lava type Viscosity Gas
content Lava flow Tectonic setting
Shield Basaltic Low Low Flat, thin flows Divergent
Composite/ stratovolcano Andesitic Moderate
to high HighTravels short
distances, blocky
Convergent (O-O and
C-O)
Shield volcanoes
• Short and broad• Not often explosive• Often found at hot
spots or divergent plate boundaries
(USGS, public domain)
Examples of shield volcanoes
Mauna Kea seen from the summit of Mauna Loa (Nula666 2010, Wikimedia Creative Commons)
Pahoehoe toe lava from Kilauea (Hawaii Volcano Observatory / USGS 2003, public domain)
Stratovolcanoes
• Tall and cone-shaped• Can be very explosive• Often found at
subduction zones
(USGS, public domain)
Examples of stratovolcanoes
Osorno, Andes (littletroll 2006, Wikimedia Creative Commons)
Fuji, Japan (松岡明芳 2013, Wikimedia Creative Commons)
Mt Merapi and 6 other volcanoes on Java (B Werner 2013, public domain)
(USGS, public domain)
References• Tompkins, D.E. (Ed.), 2011, Exploring Earth and
Environmental Science Stages 1, 2 and 3, Earth Science Western Australia
Recommended