Glacial Landforms: A Teaching Resource in Maps and GIS

By Clark, Chris D.; Ely, Jeremy C. et al. | Teaching Geography, Summer 2018 | Go to article overview

Glacial Landforms: A Teaching Resource in Maps and GIS


Clark, Chris D., Ely, Jeremy C., Doole, Jenny, Teaching Geography


Introduction

Geographical research means producing evidence that we hope makes our understanding 'less wrong' than previous versions of the 'truth'. The University of Sheffield's BRITICE project delivers landform evidence that tells us more about the huge, kilometres-thick ice sheet that once covered most of the British Isles.

The BRITICE map and GIS database of the glaciated landscape of the British Isles draw together over 170, 000 landforms from over one hundred years of field investigation, along with more recent mapping from satellite images and digital elevation models, both on- and offshore.

Thanks to this compilation, we now have an excellent picture of the distribution and pattern of Britain's glacial landforms. In our ongoing research, the pattern of retreat that we can interpret from these landforms acts as a sampling template, directing fieldwork to collect material (e.g. organics for radiocarbon dating) to date the timing and speed of ice retreat. This advances our knowledge of the ice sheet so we can assess how it responded to former climate change. The ultimate aim is to use our new knowledge to improve forecasting of the contribution of polar ice sheets to sea level rise in a warming world; here, however, we have given some examples of teaching activities to be used with the BRITICE map free poster and online resources (see below).

Drumlins and ice-flow direction

Use the online interactive BRITICE map to locate landform features. Take their latitude and longitude and find them on aerial photographs in Google Earth, to see what they look like and teach students how to identify them. The drumlins from the poster (Figure 3), for example, are good to search out: they can be found at -9.618 degrees (i.e. W) and 53.450 N. Textbooks usually say that the blunter, stoss ends of drumlins point upstream and the tapering ends point downstream. However, we have recently discovered that this is usually not the case, with most drumlins actually being symmetrical. Those with stoss and lee ends have a very slight tendency to be shaped as described in textbooks and indicating ice flow direction: however a near-equal number are shaped 'backwards', including those illustrated here. If you look on the map the ice-flow direction had to be away from central Ireland in an offshore direction: we can clearly see that the stoss (higher and wider) end of the drumlins is at the downstream end. Drumlins and their cousins, subglacial ribs (see map), were formed by interactions and shaping between the base of the ice sheet and the underlying soft sediments. Their significance and how they are formed is described in a 4-minute video on the GA website (https://www.geography.org.uk/Subglacial-bedforms-videocast).

Moraines and the pattern of ice sheet retreat

Moraines are ridges of sediment recording former ice margin positions with numerous examples across the map. Especially significant are those discovered in the last ten years on the seafloor. A useful exercise would be to get students to plot the course of retreat of the ice sheet, from its maximum extent through to its final demise. …

The rest of this article is only available to active members of Questia

Already a member? Log in now.

Notes for this article

Add a new note
If you are trying to select text to create highlights or citations, remember that you must now click or tap on the first word, and then click or tap on the last word.
One moment ...
Default project is now your active project.
Project items
Notes
Cite this article

Cited article

Style
Citations are available only to our active members.
Buy instant access to cite pages or passages in MLA 8, MLA 7, APA and Chicago citation styles.

(Einhorn, 1992, p. 25)

(Einhorn 25)

(Einhorn 25)

1. Lois J. Einhorn, Abraham Lincoln, the Orator: Penetrating the Lincoln Legend (Westport, CT: Greenwood Press, 1992), 25, http://www.questia.com/read/27419298.

Note: primary sources have slightly different requirements for citation. Please see these guidelines for more information.

Cited article

Glacial Landforms: A Teaching Resource in Maps and GIS
Settings

Settings

Typeface
Text size Smaller Larger Reset View mode
Search within

Search within this article

Look up

Look up a word

  • Dictionary
  • Thesaurus
Please submit a word or phrase above.
Print this page

Print this page

Why can't I print more than one page at a time?

Help
Full screen
Items saved from this article
  • Highlights & Notes
  • Citations
Some of your highlights are legacy items.

Highlights saved before July 30, 2012 will not be displayed on their respective source pages.

You can easily re-create the highlights by opening the book page or article, selecting the text, and clicking “Highlight.”

matching results for page

    Questia reader help

    How to highlight and cite specific passages

    1. Click or tap the first word you want to select.
    2. Click or tap the last word you want to select, and you’ll see everything in between get selected.
    3. You’ll then get a menu of options like creating a highlight or a citation from that passage of text.

    OK, got it!

    Cited passage

    Style
    Citations are available only to our active members.
    Buy instant access to cite pages or passages in MLA 8, MLA 7, APA and Chicago citation styles.

    "Portraying himself as an honest, ordinary person helped Lincoln identify with his audiences." (Einhorn, 1992, p. 25).

    "Portraying himself as an honest, ordinary person helped Lincoln identify with his audiences." (Einhorn 25)

    "Portraying himself as an honest, ordinary person helped Lincoln identify with his audiences." (Einhorn 25)

    "Portraying himself as an honest, ordinary person helped Lincoln identify with his audiences."1

    1. Lois J. Einhorn, Abraham Lincoln, the Orator: Penetrating the Lincoln Legend (Westport, CT: Greenwood Press, 1992), 25, http://www.questia.com/read/27419298.

    Cited passage

    Thanks for trying Questia!

    Please continue trying out our research tools, but please note, full functionality is available only to our active members.

    Your work will be lost once you leave this Web page.

    Buy instant access to save your work.

    Already a member? Log in now.

    Search by... Author
    Show... All Results Primary Sources Peer-reviewed

    Oops!

    An unknown error has occurred. Please click the button below to reload the page. If the problem persists, please try again in a little while.