Available online
Description
This programme comprises a detailed investigation of the Athabasca Glacier in canada looking at patterns of internal flow, crevasses, rock debris and meltwater.
This programme comprises a detailed investigation of the Athabasca Glacier in canada looking at patterns of internal flow, crevasses, rock debris and meltwater.
| Module code and title: | S335, Surface and sedimentary processes: case studies in Earth sciences |
|---|---|
| Item code: | S335; 06 |
| First transmission date: | 19-07-1980 |
| Published: | 1980 |
| Rights Statement: | |
| Restrictions on use: | |
| Duration: | 00:25:00 |
| + Show more... | |
| Producer: | P. L Firstbrook |
| Contributors: | Nat Rutter; Chris Wilson |
| Publisher: | BBC Open University |
| Keyword(s): | Bedrock; Glacier; Icefall; Meltwater; Moraine; Moulin |
| Footage description: | Aerial shots of the Canadian Rockies including the Athabasca Glacier. Commentary by Donald Holms introduces the programme. He gives brief background information on the Glacier. More shots of the Glacier. Nat Rutter, standing among crevasses in the Glacier, explains the two components which give rise to glacial flow. Shots of various ice formations. Shots of banding patterns and of a computer animation. Commentary explains the causes of foliation and the various patterns seen in the glacier. Various shots of the Glacier and of the sides of its valley. Commentary points out the sources of ice and debris which supply the Glacier. Shots of the Glacier and some of the streams which carry away the meltwater. Commentary points out the various routes these streams take. Nat Rutter, at the terminus of the Glacier, points to some of the basal debris which is deposited here. Then, looking at a bedrock high which was covered by the ice until about 50 years ago, he points out the effects of the ice on the bedrock. Rutter goes on to show the differences between basal and interglacial debris. Shots of both. Chris Wilson, standing on a terminal moraine, explains how these were formed and how they are useful in determining the original thickness of the ice at the time they were formed. Chris Wilson goes on to explain how Sunwapta Lake at the base of the Glacier was formed. Shots of the lake. He then discusses the characteristics and origins of the sediments around the lake. Over aerial shots of the Glacier, of Lake Sunwapta and of glacial streams, commentary by Donald Holms sums up the programme. |
| Master spool number: | OU3295 |
| Production number: | FOUS048S |
| Videofinder number: | 1385 |
| Available to public: | no |
