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Rocks - PowerPoint PPT Presentation


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Rocks. Marble. Sandstone, Marble and Granite. Granite. Korean War Memorial is actually made from stainless steel….. But I really like it so I wanted to show it to you . Red Granite. I Will Be Able To…. Arrange and define 4 stages of sedimentary rock formation.

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slide6

Korean War Memorial is actually made from stainless steel…..

But I really like it so I wanted to show it to you

i will be able to
I Will Be Able To…
  • Arrange and define 4 stages of sedimentary rock formation.
  • Describe the difference between intrusive and extrusive igneous rock.
  • Recognize the difference between foliated and unfoliated
  • List common uses for 3 different types of rocks
  • Apply the rock cycle
  • Distinguish between the 3 classifications of rocks
  • Illustrate how a rock becomes a metamorphic rock
  • Evaluate rocks to determine their classification and names
definition
Definition
  • Rocks are the hard part of the earth
  • Rocks are composed of one or more minerals
  • Rocks can be made up of organic matter
how to classify rocks
How to Classify Rocks

Color

Mineral Composition

Texture

Grain size

Grain shape

Grain pattern

color
Color
  • This is a quick easy to observe property that can point you in the right direction.
  • Helps identify mineral composition

Granite

texture
Texture
  • Grain size
  • Grain pattern
  • Grain shape
grain size
Grain Size

Fine Grained

Medium Grained

Course Grained

grain shape
Grain Shape

Rounded grain Angular grain

grain pattern
Grain Pattern

Banded Non Banded

three classifications of rocks
Three Classifications of Rocks
  • Igneous
  • Sedimentary
  • Metamorphic
igneous rocks
Igneous rocks

Fire rocks

igneous
Igneous
  • Igneous Rocks are formed form lava or magma.
extrusive
Extrusive
  • Rocks formed form lava. These are also called volcanic rocks.
    • Pumice
    • Basalt
    • Obsidian
intrusive
Intrusive
  • Formed from magma
    • Granite
    • Gabbaro
    • Diorite
cooling rates
Cooling Rates
  • Fast cooling have shinny reflections.
  • Slow cooling have visible crystals
granite
Granite
  • Light-colored, coarse- grained, no pattern
  • Mostly quartz, feldspar, mica, and hornblende
  • Often used for buildings and monuments
basalt
Basalt
  • Dark-colored, fine- grained, extrusive
  • Formed where lava erupted onto surface
  • Most widespread igneous rocks
  • Found locally in the Palisades along west shore of Hudson River, Connecticut River valley
gabbro
Gabbro
  • Dark-colored, coarse- grained intrusive
  • Similar composition to basalt—plagioclase feldspar with some pyroxene and olivine
slide25

Obsidian

  • Natural volcanic glass
  • Forms when lava cools very quickly
  • Usually dark, but small pieces may be clear
  • Fractures along curved (conchoidal) surface
  • Used as spear and arrow points, knives
slide26
Uses

Buildings

Countertops

Soap

Aggregate

sedimentary rocks
Sedimentary Rocks

Packed Rocks

sedimentary
Sedimentary
  • Formed from fragments of rocks and minerals that break up or dissolve into water.
formation process
Formation Process
  • Erosion
  • Deposition
  • Compaction
  • Cementation
erosion
Erosion
  • Wearing away of rocks by wind, water, or ice.
deposition
Deposition
  • Sediment settling out of the wind or water that is carrying it.
compaction
Compaction
  • Process of sediment settling together
cementation
Cementation
  • Process of dissolved minerals crystallizing and gluing rock sediments together.
types
Types
  • Clastic
  • Organic
  • Chemical
clastic
Clastic
  • Sedimentary Rocks composed of sediment and rock fragments that have been deposited, compacted and cemented.
pink sandstone
Pink sandstone
  • Pink or reddish in color
    • Composed of quartz and feldspar minerals
  • Texture
    • Medium Grain Size
    • Angular or Rounded Grain
    • Well sorted, no banding
    • Slightly porous
conglomerate
Conglomerate
  • Color
    • Tan to dark brown with nearly any color spots
    • Fragments of all types of rocks usually cemented by quartz, iron oxides, or calcite.
  • Texture
    • Very course
    • Rounded Grain
    • Non banded
breccia
Breccia
  • Color
    • Light brown or tan with grey white or black spots
    • Composed of all types of rocks and cemented by salts
  • Texture
    • Very course
    • Angular
    • Non banded
organic
Organic
  • Made from the organic material that has been deposited, compacted and cemented
slide40
Coal
  • Color
    • Black or dark grey
  • Texture
    • Medium-Fine grained
    • Angular or rounded
    • Non banded
organic fossil sandstone
Organic/Fossil Sandstone
  • Color
    • Light colored, white to yellow or tan
  • Texture
    • Medium or fine grained
    • Angular fragments
    • Non banded
    • May have distinct fossils
diatomite
Diatomite
  • Color
    • Light brown or tan
    • Composed of silica from hard celled algae
  • Texture
    • Fine grained
    • Rounded or Angular
    • Non banded
    • Powdery
chemical
Chemical
  • Rocks that are formed form minerals that were once dissolved in water usually left behind after evaporation.
slide44

Rock Gypsum

Alabaster

Rock Salt

slide45
Uses

Building Stones

Cement

Fiberglass

Fuel

metamorphic rock
Metamorphic Rock

Changed Rock

metamorphic
Metamorphic
  • Formed by heat and pressure of other rocks deep in the earth
regional
Regional
  • Plates get pushed under and thus pressurized and heated
  • Plates get pushed up into mountains
contact
Contact
  • Lava veins shooting up near rock give off intense heat
foliated
Foliated
  • These rocks have a banded texture.
  • Can layers of the same rock or of crystals
folded schist
Folded Schist
  • Color
    • Tan with colored bands
  • Texture
    • Medium grained
    • Angular
    • Banded
    • Wavy
slate
Slate
  • Color
    • Black
  • Texture
    • Fine grained
    • Angular grains
    • Banded
gneiss
Gneiss
  • Color
    • Dark and light color bands
  • Texture
    • Coarse grained
    • Angular grains
    • Banded
non foliated
Non foliated
  • No bands or lines running across the minerals

Quartzite

Marble

quartzite
Quartzite
  • Color
    • Pale brown
  • Texture
    • Medium grain
    • Angular
    • No bands (non foliated)
marble
Marble
  • Color
    • White or grayish
  • Texture
    • Course, medium and fine grains
    • Angular grains
    • Non banded (non foliated)
slide57
Uses

Sculptures

Flooring

Roofing