Wind
All erosion by wind is a form of _______ weathering.
What is PHYSICAL WEATHERING?
What is GROUNDWATER?
When water seeps into cracks in a rock, freezes and expands, breaking the rock apart.
What is ICE WEDGING?
All erosion by gravity is ________ weathering.
What is PHYSICAL WEATHERING?
The force mainly responsible for erosion & deposition that happens in landslides, rockfalls and mudflows.
What is GRAVITY?
This rock formation can only be created by wind and sand.
What is a MUSHROOM ROCK?
Water, oxygen and metals in a rock can combine to create this form of chemical weathering.
What is OXIDATION?
When material falls from a mountain and settles in a fan shape at the bottom.
What is an ALLUVIAL FAN?
A super slow-motion landslide.
What is a CREEP?
If a mountain slope has NO vegetation and there is a sudden rain storm, this mix of water, soil and rock can flow rapidly down the slope.
What is a MUDFLOW?
A mound or hill made up of wind-deposited material.
What is a DUNE?
The name for the three-sided shape of a river where it meets a larger body of water.
What is a DELTA?
A large mass of moving ice made up of compacted snow.
What is a GLACIER?
What is a ROCKFALL?
The tallest sand dunes in North America are found in Great Sand Dunes National Park and Preserve in Colorado. These dunes were formed from sand at the bottom of a dry lake bed, most likely by this force of nature.
What is wind?
The grinding and wearing down of rock by other rock or sand particles.
What is abrasion?
This dissolves rocks & minerals to create caves.
What is ACID GROUNDWATER?
The general term for all the materials carried and deposited by a glacier.
What is GLACIAL DRIFT?
The sudden and rapid movement of a large amount of material downslope.
What is a LANDSLIDE?
When outer layers of rock are pushed upward and slowly peeled away because of underground pressure changes.
What is EXFOLIATION?
A fine-grained sediment (like soft powder) that can be blown by the wind.
What is LOESS?
An area of flat land near a river that floods occasionally.
What is a FLOODPLAIN?
This rock formation can only be created by a glacier moving across bedrock.
What are GLACIAL GROOVES?
Glaciers form in cold areas with lots of snow. _______ turns the snow into ice to form a glacier.
What is compaction, or the weight of the snow?
When glaciers retreat, they leave behind huge blocks of ice. When these ice blocks melt, they can form bodies of water called _____ ______ and rock formations called ______.
What are KETTLE LAKES and ERRATICS?