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Watts, May Theilgaard

Arboretum Landscape Teaching Aid Series: The Great Ice Sheet


Identifier
3.19496
Format
black marker and watercolor on illustration board
Digitization Status
Digitized
Reproduction:
Original
Dimensions
34.5 cm W x 56 cm H (Item)
Extent
1 sheet
Type
Drawing
Date created
mid 20th century
Description
Primarily textual teaching aid depicting Arboretum landscape. This material shows how the Arboretum Hills were pushed from Canada and Wisconsin.

Header: THE GREAT ICE SHEET brought THE ARBORETUM HILLS from Canada to Wisconsin

Text and illustrations from top to bottom:
  • [Depicted in stylized scroll with an illustration of a body of water between two hills] The Record: The Arboretum hills are made of unsorted clay, sand, gravel and boulders.
  • Interpreting the record:
    • 1) Ice-deposited material is an unsorted material [arrow pointing right to illustration of ice-deposited material] Water-deposited material is sorted into layers [arrow pointing right to illustration of water-deposited material] The Arboretum hills are made of material dumped by the melting ice.
    • 2) Granite boulders are found in this material. No granite bed-rock is found within 200 miles of here.
    • 3) Rocks frozen into a glacier are flattened and scratched like this [arrow pointing left to illustration of a rock] (see rock at end of table) Water-borne rocks are rounded and smoothed.
Language
English