r ocks. marble sandstone, marble and granite granite
TRANSCRIPT
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…
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
DEFINITIONRocks are the hard part of the
earth
Rocks are composed of one or more minerals
Rocks can be made up of organic matter
COLORThis is a quick easy to observe
property that can point you in the right direction.
Helps identify mineral composition
Granite
GRANITE
• Light-colored, coarse- grained, no pattern
• Mostly quartz, feldspar, mica, and hornblende
• Often used for buildings and monuments
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
• Dark-colored, coarse- grained intrusive
• Similar composition to basalt—plagioclase feldspar with some pyroxene and olivine
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
CLASTIC
Sedimentary Rocks composed of sediment and rock fragments that have been deposited, compacted and cemented.
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 Color
Tan to dark brown with nearly any color spots
Fragments of all types of rocks usually cemented by quartz, iron oxides, or calcite.
TextureVery courseRounded GrainNon banded
BRECCIA
ColorLight brown or tan
with grey white or black spots
Composed of all types of rocks and cemented by salts
TextureVery courseAngular Non banded
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
Color Light brown or tan Composed of silica from hard celled algae
Texture Fine grained Rounded or Angular Non banded Powdery
CHEMICAL
Rocks that are formed form minerals that were once dissolved in water usually left behind after evaporation.
REGIONAL
Plates get pushed under and thus pressurized and heated
Plates get pushed up into mountains
MARBLE
Color White or grayish
Texture Course, medium and fine grains Angular grains Non banded (non foliated)