Rocks rock
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Rocks Rock!. Jan McClain Lydene Aldrich Virginia Acey. Agenda. Types of Rocks Igneous Sedimentary Metamorphic. Igneous Rocks. “Fire Rock” Intrusive Extrusive. Igneous Rocks. Granite – Intrusive rock formed slowly from pockets of magma that are trapped underground.

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Rocks Rock!

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Rocks rock

Rocks Rock!

Jan McClain

Lydene Aldrich

Virginia Acey


Agenda

Agenda

Types of Rocks

Igneous

Sedimentary

Metamorphic


Igneous rocks

Igneous Rocks

“Fire Rock”

Intrusive

Extrusive


Igneous rocks1

Igneous Rocks

  • Granite – Intrusive rock formed slowly from pockets of magma that are trapped underground.

  • Pumice – Extrusive formed when lava cools quickly above ground. It is characterized by little pockets of air holes.

  • Scoria – Extrusive formed when lava cools quickly above ground. A kind of glass and not a mixture of minerals.

  • Obsidian – Extrusive formed when lava cools quickly above ground. It is actually glass and not a mineral and the edges of the rock are very sharp.


Sedimentary rocks

Sedimentary Rocks

“Rocks formed by erosion and pressure.”


Sedimentary rocks1

Sedimentary Rocks

  • Plant and animal matter settle in the sediment.

  • Pressure from the weight of the sediment creates layers of solid rock.

  • The rock layers are unique to sedimentary rocks.

  • Only rock that contains fossils.

  • Types: sandstone, limestone, gypsum, conglomerate, and shale.


Metamorphic rocks

Metamorphic Rocks

“Rocks altered by heat or by heat and pressure.”


Metamorphic rocks1

Metamorphic Rocks

  • Metamorphic rocks are sedimentary or igneous rocks that have been modified or changed in form.

  • Metamorphic rocks are identified by the types of minerals they contain and their texture.

  • These rocks make a "ching" sound instead of a "chunk" sound when tapped.

  • They are characterized by ribbonlike layers and may have shiny crystals.

  • Examples of this rock type include gneiss and marble.


Rock cycle

Melting

Metamorphic Rock

Heat & Pressure

Sedimentary Rock

Magma

Compacting &Cementing

Cooling

Weathering & Erosion

Sediment

Igneous

Rock

Rock Cycle


What geologic features do we see locally as the result of the rock cycle

What geologic features do we see locally as the result of the Rock Cycle?

  • Erosion evidence

  • Sedimentary rocks

  • Rivers

  • Hills


What geologic features do we not see as the result of the rock cycle

What geologic features do we NOT see as the result of the Rock Cycle?

  • Volcanoes

  • Glacier Deposits

  • Deserts


The end

The End


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