Formatblack marker and watercolor on illustration board
Dimensions34.5 cm W x 56 cm H (Item)
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.