The Rock Cycle in a Museum:
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Building materials as geologic samples Thursdays for Teachers September 24, 2009
description
The Rock Cycle in a Museum:. Building materials as geologic samples Thursdays for Teachers September 24, 2009. Rock Cycle. The earth’s recycling system. Rock Cycle. Rocks related to other rocks Related by processes There is a cyclicity of earth processes Product of our dynamic planet. - PowerPoint PPT Presentation
Transcript of The Rock Cycle in a Museum:
Building materials as geologic samples
Thursdays for TeachersSeptember 24, 2009
The earth’s recycling system
Rocks related to other rocksRelated by processesThere is a cyclicity of earth processesProduct of our dynamic planet
magma
molten rock
igneous rock
Form from cooling and crystallization of magma (molten rock)
Liquid -> solidAtoms, ions, ionic complexesWith cooling, movement slowsAligned, orderedForm minerals
Igneous rocks (as well as other rock types) can be uplifted and exposed at the earth’s surface
Subject to atmosphere, hydrosphere, biosphere
Break down - weatheringSolid rock -> small particles & dissolved
material
magma
molten rock
igneous rock
uplift &weathering
cooling & crystallization
Dissolution of the mineral calcite
magma
molten rock
igneous rock
uplift &weathering
cooling & crystallization
sediment
Transported by water, wind, ice, gravityDeposited in different environmentsWeight of overlying sediment compresses
sediments belowCompaction of grains, expulsion of waterVoids filled with minerals (cement)Forms sedimentary rocks
magma
molten rock
igneous rock
uplift &weathering
cooling & crystallization
sedimentsedimentary
rock
transportation,deposition, &cementation
Continued burial, pressure & temperature rise
Chemical reactions occur (minerals out of stability fields)
Create new minerals and texturesMetamorphism (change)
magma
molten rock
igneous rock
uplift &weathering
cooling & crystallization
sedimentsedimentary
rock
transportation,deposition, &cementation
metamorphic rock
increased T & Pmetamorphism
igneousmetamorphic
magma
molten rock
igneous rock
uplift &weathering
cooling & crystallization
sedimentsedimentary
rock
transportation,deposition, &cementation
metamorphic rock
increased T & Pmetamorphism
melting
Can you think of any modifications we should make to the rock cycle to make it more realistic?
i.e. do all metamorphic rocks melt?do all sedimentary rocks become
metamorphic rocks?How can the rock cycle link to the water
cycle or the tectonic cycle?
magma
molten rock
igneous rock
uplift &weathering
cooling & crystallization
sedimentsedimentary
rock
transportation,deposition, &cementation
metamorphic rock
increased T & Pmetamorphism
melting
shortcuts
Look for different rock types in the museum
Think about how you could use your school or nearby buildings
