Sedimentary rocks. Conglomerate- clastic Made of rock pieces and pebbles that are rounded in shape.
Sedimentary Rocks...Sedimentary Rocks •Sandstone (14B) •Limestone-Shell (13B) •Shale (15B)...
Transcript of Sedimentary Rocks...Sedimentary Rocks •Sandstone (14B) •Limestone-Shell (13B) •Shale (15B)...
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Sedimentary Rocks
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Erosion
• Erosion is a natural process where rocks
and soil are Broken and Moved
• We will focus on 4 types of erosion;
Wind, Rain, Ice and Water
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Wind Erosion• Usually in dry
environments
• Wind moves dust, sand, and sometimes larger rocks across other rocks wearing them down
• The wind often carries these small rock particles to another location
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Types of Water Erosion
• Rain
• Frost Wedging
• Glaciers
• Flowing water
• Costal wave
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Rain
•Rain erosion is a result of
raindrops hitting soil or rock
•The rain can move
particles to a new location
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Frost Wedging
•Caused by the Expansion
of water as it goes from
liquid to solid (Water to Ice)
•Ice gains 9% Volume when
it freezes from water
•This force can crack and
crumble rocks
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Glaciers•Glaciers are huge sheets
of ice that stay frozen all
year
•The glaciers slowly move
and “flow”
•This force Pushes and
drops rocks as it moves,
and can Scrape bedrock
behind it
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Flowing Water
•Water flowing
downhill moves sediment
and grinds away rocks
•It can grind away rock and
make canyons
•It can sort material by size
and deposit it in new places
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Costal-Wave•Wave action can cut
and form rock cliffs
•It deposits material on
the beach, and the
seafloor
•It can sort material by
size
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Sedimentary Rock Formation
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Rock Properties
• Grain size
• Grain sorting
• Cementation
• Fissile
• Clastic
• Bioclastic
• Biochemical
• Chemical
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Clastic Bioclastic Biochemical Chemical
Clastic rocks are
made of Rock or
Mineral particles
Cemented together
Bioclastic rocks are
made of Organic and
inorganic particles
Cemented together
Chemical rocks are
made of Crystals
deposited from a
solution
Biochemical rocks
are made of Organic
and inorganic
particles Crystallized
together
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Grains
The relative and actual
size of the grains tell
us about the conditions
under which the rock
was formed
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Cementation
Most cements in
sedimentary rock
are calcite,
quartz or feldspar
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Fissile - Somewhat Fissile - Not Fissile
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Sedimentary Rocks
• Sandstone (14B)
• Limestone-Shell (13B)
• Shale (15B)
• Conglomerate (12B)
• Bituminous Coal (11B)