Glaciers: Erosional Features

This program investigates how mountains of ice, moving of their own power, wear away the surface of the earth. The DVD looks at cirques, arêtes, U-shaped valleys, hanging valleys, glacial groves and striae in both alpine and continental glaciers.

22 mins. | IV129D $32.95 DVD

22 mins. | IV129V $29.95 VHS

Glaciers: Depositional Features

Once the massive thickness of ice has carved and gouged the earth surface it eventually moves it and deposits this material in another place. The depositional features of glaciers are featured including moraines (lateral, medial and end), kames, eskers, drumlins, and glacial erratics. The DVD is digitally mastered from film and videotape from locations in Alaska, Wisconsin, Colorado and Ohio.

22 mins. | IV130D $32.95 DVD

22 mins. | IV130V $29.95 VHS

Glaciers Shape Our Earth

Glaciers have probably had a more profound effect on the surface of earth than any other geological process. If you had only one audio-visual teaching aid to help explain the world of glaciers to your students, this would be the one. Shot on location all over the world, this 45 minute program investigates the work of the glaciers and how they affected most of North America. Some of the topics which this program investigates include:

• How glaciers grow from a snowflake to mountain of ice

• How glaciers move or flow

• How the land is sculptured and changed by glaciers

• Depositional features such as kames, eskers, lateral, medial and terminal moraines and crevasses

• Erosional features such as U-shaped valleys, arêtes, horns and fiords

• Why glaciers form in the first place? What about the future? Will we have more Ice Ages?

• Evidence to show that the glaciers have moved

• Alpine Glaciers

• Continental and Piedmont Glaciers

This DVD is digitally mastered from film and videotape from locations in Alaska, Colorado, Ohio, Iowa, Maine, California, Wisconsin, Michigan, Washington, Oregon and New York. Exciting photography and explanations make this program one of your most useful teaching tools. Highlights of the DVD include aerials of Alaska glaciers.

45 mins. | IV131D $32.95 DVD

45 mins. | IV131V $29.95 VHS

The Great Ice Age

Explores the time when glaciers covered most of North America. This program features famous glacial grooves at Kelley's Island located in the western basin of Lake Erie, Yosemite National Park and the Great Lakes region.

21 mins. | IV132D $32.95 DVD

21 mins. | IV132V $29.95 VHS

Glaciers: Clues to Future Climate

Present day glaciers have considerable economic importance in many areas. In the western United States glaciers are considered to be frozen reservoirs which release water during the warmer summer months. They are also of considerable importance to the irrigation of crops and hydroelectric power and to feeding underground water reservoirs. For these reasons scientists have been studying glaciers around the world. Are we still coming out of an ice age which covered much of New England and the Midwest just 13,000 years ago? Or are we heading into another ice age in the near future? Explore how glaciologists are using new scientific tools to study glaciers on the surface of the Earth. See how satellites are keeping track of glacial growth or shrinkage in places like Antarctica, Greenland and Iceland.

23 mins. | IV133D $32.95 DVD

23 mins. | IV133V $29.95 VHS