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Earth Science Digital Image Library - Chatter Marks and Glacial Polish

Digital Profile

Earth Science Digital Image Library - Chatter Marks and Glacial Polish

Grade Levels

3rd Grade, 4th Grade, 5th Grade, 8th Grade

Course, Subject

Science and Technology and Engineering Education, Science
Related Academic Standards
3.3.3.A2 3.3.3.A2
Identify the physical properties of minerals and demonstrate how minerals can be tested for these different physical properties.
3.3.4.A1 3.3.4.A1

Describe basic landforms.

Identify the layers of the earth.

Recognize that the surface of the earth changes due to slow processes and rapid processes.
3.3.5.A1 3.3.5.A1
Describe how landforms are the result of a combination of destructive forces such as erosion and constructive erosion, deposition of sediment, etc.
3.3.8.A1 3.3.8.A1

Distinguish between physical and chemical weathering.

Compare and contrast the types of energy that drive Earth’s systems.
S8.D.1.1.2 S8.D.1.1.2
Describe natural processes that change Earth’s surface (e.g., landslides, volcanic eruptions, earthquakes, mountain building, new land being formed, weathering, erosion, sedimentation, soil formation).
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Topic

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Erosion

Description

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At the base of glacial ice, blocks may press so heavily against bedrock that they cause it to fracture resulting in a string of cuspate joints called chatter marks (1989, Van Diver, Bradford, Roadside Geology of New York). The smooth, even surface known as glacial polish, was produced by the movement of abrasive laden glacial ice on bedrock. Arrow illustrates ice flow direction on the Shawangunk Conglomerate (Middle – Upper Silurian).

Location

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Minnewaska State Park, near New Paltz, Ulster County, NY.

Credits


With support from the Center for Applied Technologies in Education, The Earth Science Digital Image Library is an initiative authored by Russell Agostaro, Newburgh Enlarged City School District, Newburgh, New York.

Description

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The Earth Science Digital Image Library is an archive of quality digital images for teacher and/or student reference in their studies of Earth Science. For additional information about the image, please click on a link below:
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