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S1112ES-Ic-15-16.ppt - EARTH AND LIFE SCIENCE QUARTER I...

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IT’S ALL ABOUT MAGMAEARTH AND LIFE SCIENCEQUARTER I
Learning Competency:Describe how magmais formed(magmatism)
Describe whathappens after themagma is formed
DEPARTMENT OF EDUCATION(plutonism andvolcanism)2
DEPARTMENT OF EDUCATIONMagmathe molten rock foundbeneath the earth’ssurfacea Greek word meaning‘thick ointment’formed from the meltingof rocks in the earth’slithosphere3
DEPARTMENT OF EDUCATIONMagmatism4slideshare.net
DEPARTMENT OF EDUCATIONThe formation and movement of magmais under the earth’s crust5MagmatismHow magma is formed?Formed by bothwetanddrymeltingprocesses
DEPARTMENT OF EDUCATIONMagmatismFactors involved inthe formation ofmagma:TemperaturePressureWater content6
DEPARTMENT OF EDUCATIONWhat happens to magmaafter it is formed?(1) Do you think magma rises or stays inplace?(2) What happens to the composition ofmagma as it rises up?7
DEPARTMENT OF EDUCATIONwhy and how magma risesup (Monroe et al., PhysicalGeology, 2007, p107).Densitycontrast:magmaislessdense than the surrounding countryrock. Magma rises faster when thedensity contrast between the magmaand the country rock is greater.8
DEPARTMENT OF EDUCATIONAt deeper levels,magma passes throughmineral grain boundaries and cracks in thesurrounding rock. When enough mass andbuoyancyisattained,theoverlyingsurrounding rock is pushed aside as themagma rises. Depending on surroundingpressure and other factors, the magmacan be ejected to the Earth’s surface orrise at shallower levels underneath.

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Term
Fall
Professor
Prof. Cesar Liwanag
Tags
Department of Education

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