Transcript Erosion and Deposition - Mrs. Rasmussen Science Class

What are erosion and deposition?
• Erosion—
sediments being carried
away
• Deposition—
sediments being laid
down (deposited)
How are erosion and deposition related to
weathering?
Sediment
settles and
can create
new rocks
Weathering
Rock turns to
sediment
Deposition
Erosion
Sediment is
carried away
There are 5 things that create erosion and
deposition:
1. Wind— Blows away loose sediments
2. Running Water—Rain, rivers, groundwater
3. Gravity— Makes sediments fall
4. Glaciers—rocks in the ice carve the land and get
left behind when the glacier melts
5. Waves—reshape shorelines by moving sediment
Wind
Mushroom Rocks—Formed when wind eats away
faster at weaker layers of rock on the bottom.
Wind
Sand Dunes—Deposits of wind-blown sand that can take
many shapes.
Running Water
V-shaped Valleys/canyons—narrow at the bottom and
wide at the top. Always carved by rivers.
Running Water
Meanders—looplike bends in a river that carves the
landscape
Running Water
Cave—A natural hole in the earth carved out by water.
Running Water
Delta—Land made when rivers deposit sediment
when they meet the ocean
Gravity
Landslides—Rapid downhill movement of rocks
and dirt
Gravity
Slump—entire chunks of ground break and move down
a hill
Gravity
Creep—VERY SLOW, gradual movement of dirt
down a slope.
Glaciers
U-Shaped Valleys—Very wide, rounded
valleys carved out by a glacier moving through
Glaciers
Horns—very pointy top of a mountain carved
when a glacier slid down.
Horns
Glaciers
Cirques—bowl-shaped hollow in a mountain carved
by a glacier
Cirque
Waves
Sea Arches—a hole carved by waves in a thin
piece of rock
Waves
Sea Stacks—rock left by a collapsed sea arch
Waves
Beaches-An area of wave-washed sediment along
a coast.
Waves
Spits—A beach that sticks out like a finger into
the ocean.