Deposition Ms. Susinno Please view as a slideshow Toolbar Slideshow From Current Slide

Deposition: when wind, waves, glaciers, and gravity lose carrying power, particles are dropped onto the surface of the land. (Review book pgs ) When the agents slow down, sediments are deposited (+)

Not floating, not sinking… IN SUSPENSION! (ions of molecules broken apart by chemical change…ya can’t see them, but ya can taste them! ) How a riVer carries sediment: The bed load is Rollin’ and Bouncin’

When a riVer slows, what does it deposit first?

When the river meets the sea= Delta

DELTA = Horizontal sorting slows slower Slowest… X Mineral precipitates Remember me? xx Any time sediment is deposited by running water, it is sorted!

Alluvial fan: When the river meets the land

The point bar is the depositional feature of a meander! slower faster

Now let’s talk about STILL water: Glacial outwash- melt water at the end of a glacier Lakes!

How does particle size, shape and density affect settling time in STILL water? See for yourself on the animation link below

How does particle size, shape and density affect settling time in still water? As density increases setting time _________________, and settling rate _____________________. As roundness increases setting time _________________, and settling rate _____________________.

Factors affecting deposition in still water: 1. Particle size- larger particles will settle faster. 2. Particle shape- round particles will settle faster than flat ones. 3. Particle density- higher density particles settle first. Density always wins

Vertical sorting or graded bedding- when sediment is deposited into still water (deep ocean or lake). Ooh yay! :0) Another diagram:

When sediment is deposited into still water or lake… The number of layers tells how many depositional events there were. First event Second event Graded bedding- vertical sorting

Horizontal Sorting animation: e01.cfm?chapter_no=visualization Deposition Animations geological-history-v2.2.html earth.com/visualizations/jela/1-earth- watersheds-v3.2.html How deltas form:

A B Matching! Which #s go with each lettered diagram? 1. Delta 2. Sediment is sorted in layers called Graded Bedding 3. Associated with running water. 4. Associated with still water. 5. Layers are created by pulses of depositional events. 6. Sediment is sorted horizontally- velocity decreases and larger, denser sediments settle first and smaller, less dense particles are carried further.

Why is the rock carved out more toward the bottom?

1. Which particle size is the least likely to be found in a deposit of loess? (1) pebbles (2) sand (3) silt (4) clay 2. In what environment are you most likely to find wind erosion? (1) humid areas (2) deserts (3) forests 3. Winds transport sand and other materials by (1) water and rolling(2) suspension and bouncing (3) ice and snow (4) ocean currents and waves 4. Shallow depressions produced by deflation and are called (1) sand dunes (2) loess (3) blow outs (4) ventifacts 5. Complete the chart by marking an X in the appropriate spot. FeatureErosionalDepositional Loess Sand Dune Blow out

Vanishing glacier on Mt Kilimanjaro Glacial advance: Polished rock with striations

Continental Glaciers- very large glaciers (Antarctica and Greenland) so thick that they cover all landscape features except the highest mountains.

SNOW LINE VARIES WITH ALTITUDE

Long Island is the result of a continental glacier’s retreat!

Snow line- Alpine Glacier 1/es1501page01.cfm?chapter_no=visualization What makes a glacier advance?

Which one is the Erratic?