page 180 Mass Movements, Wind, and Glaciers
National
Landslide Information Center
At this USGS site you can find out more about mass movements such as
landslides and earthquakes. This site has up-to-date information about
recent earthquakes, landslides, and rock falls including live cameras
stationed at active landslide areas.
Mass
Movements on Venus
If you think mass movements only occur on Earth, visit this site to
find out for sure. Click on observations and descriptions of Venusian
mass movement features to find out about landslides on the planet Venus.
The articles include a graphic of the classification of mass movements
on Earth and Venus, and radar images of events on Venus that were recorded
during the Magellan spacecraft’s first mapping cycle.
Fact
Sheet: Landslides and Mudflows
Visit this site by the Virtual Library and Electronic Reading Room of
the Federal Emergency Management Agency to find out how to protect yourself
from a landslide or mudflow. You can learn how to recognize landslide
warning signs, such as new cracks appearing in house foundations. If
a landslide occurs when you are indoors, what two things can you do
to protect yourself?
International
Avalanche Danger Scale
The Colorado Avalanche Information Center is a part of the Colorado
Geological Survey. This site gives the International Avalanche Danger
Scale, a classification chart of avalanche danger used in the United
States, Canada, and Europe. From this scale, what would you say is the
likelihood of a natural avalanche in a moderate avalanche zone?
page 180 Wind Erosion
Dune
Formation and Reactivation
Visit this site by the U.S. Global Change Research Information Office
for a description of dunes and sand sheet development, including coastal
dunes, desert margin dunes, and dunes of temperate regions. Scroll down
and read related environmental and geological issues. Why do human efforts
to stabilize dunes often fail?
California’s
Coastal Sand Dunes
Go to this site by the California Coastal Commission to learn about
the sand dunes along the California coast, as well as their ecosystems.
Which areas of the California coast have the largest dune fields?
Loess
At this site by the Illinois State Museum you can find out more about
loess, layers of silt deposited by the wind. Extensive loess deposits
are often found one on top of another in the same location. How does
the origin of most loess deposits support this finding?
Geology of Loess Hills
Visit this site by the Monona County Conservation Board of Iowa to read
a description of the formation of the county’s Loess Hills. What type
of soil particles is loess made up of? Loess soils are typically arid.
Does knowing the type of soil particles in loess help explain this aridity?
page 206 Rates of Glacial Movement
Ice:
Does Ice Move?
Visit this site by Rice University to find out everything you wanted
to know about ice, especially ice found in glaciers. Scroll down and
read about the three ways that ice flows. How fast can a glacier move
by internal deformation? How does this compare to the rate of movement
by basal sliding?
Coastal-Change
and Glaciological Maps of Antarctica
Go to this site to discover the changes that might occur worldwide if
part of the Antarctic ice sheet melted. This site includes a map of
Antarctica showing the ice shelves where large coastal changes occur.
The
Evolution of Long Island Sound
This site describes how glaciers formed Long Island Sound. All of Long
Island, New York, is considered to be a terminal moraine left by a succession
of glaciers. At what places on Long Island are you likely to find recessional
moraines?
Glacier
At this Compton’s Encyclopedia Online site you can learn about glaciers. Click through the links to learn more about glaciers and their formations. What are some geologic formations glaciers make?
