Glacial limits, sea-level changes and vegetational development in part of Wester Ross
The area studied is part of Wester Ross, north-west Scotland, and includes the Applecross Peninsula and the land to the east between Strathcarron and Glen Torridon. Mapping of glacial landforms involved study of aerial photographs and subsequent field work. Evidence was found for the existence of tw...
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Language: | English |
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The University of Edinburgh
1977
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ftunivedinburgh:oai:era.ed.ac.uk:1842/10613 2023-07-30T04:04:14+02:00 Glacial limits, sea-level changes and vegetational development in part of Wester Ross Robinson, Mary Newey, W. W. Sissons, J. B. 1977 application/pdf http://hdl.handle.net/1842/10613 en eng The University of Edinburgh The University of Edinburgh. College of Science and Engineering http://hdl.handle.net/1842/10613 Glaciers Glaciation Deglaciation Thesis or Dissertation Doctoral PhD Doctor of Philosophy 1977 ftunivedinburgh 2023-07-09T20:31:02Z The area studied is part of Wester Ross, north-west Scotland, and includes the Applecross Peninsula and the land to the east between Strathcarron and Glen Torridon. Mapping of glacial landforms involved study of aerial photographs and subsequent field work. Evidence was found for the existence of two ice caps and five separate coire glaciers during the Loch Lomond Readvance, their various termini being represented today by clear lateral and end moraines at fourteen out of twenty-five locations. In nine cases, multiple lateral and/or end moraines suggest fluctuation of these ice margins during the Stadial maximum. An earlier stage of glaciation not related to the Late-Devensian ice-sheet maximum is represented by a single moraine and glacial striae. It is believed that this substage probably occurred between 18,000 and 14,000 years ago. Former sea-level changes were investigated by accurate mapping and instrumental levelling of raised coastal features. Three major periods of formation were identified :- 1. A pre-glacial or interglacial stage, evidenced by a highlevel rock platform at 32 to 37 m O.D.; 2. Raised beaches and deltas lying between 21 and 28 m O.D. relating to a period of very early Lateglacial deglaciation; 3. Postglacial features lying below about 10 m O.D. Pollen analysis of core sequences from two sites helped confirm the Loch Lomond Readvance age of the end moraines in Strath a' Bhathaich and to elucidate the history of vegetational development in the area between ca. 13,000 and 9,000 B.P. The Lateglacial pollen diagram indicates early development of a treeless Empetrum- dominated landscape that reverted during the Stadial to tundra-like conditions with a floristically-poor, open vegetation. Both Postglacial diagrams indicate a rapid recovery in early Postglacial times, with the return of pioneer species shortly superceded by a closed vegetation, and then by immigration of birch trees, and the establishment of a mixed birch-hazel woodland. Doctoral or Postdoctoral Thesis Ice Sheet Tundra Edinburgh Research Archive (ERA - University of Edinburgh) Loch Lomond ENVELOPE(-125.746,-125.746,54.239,54.239) |
institution |
Open Polar |
collection |
Edinburgh Research Archive (ERA - University of Edinburgh) |
op_collection_id |
ftunivedinburgh |
language |
English |
topic |
Glaciers Glaciation Deglaciation |
spellingShingle |
Glaciers Glaciation Deglaciation Robinson, Mary Glacial limits, sea-level changes and vegetational development in part of Wester Ross |
topic_facet |
Glaciers Glaciation Deglaciation |
description |
The area studied is part of Wester Ross, north-west Scotland, and includes the Applecross Peninsula and the land to the east between Strathcarron and Glen Torridon. Mapping of glacial landforms involved study of aerial photographs and subsequent field work. Evidence was found for the existence of two ice caps and five separate coire glaciers during the Loch Lomond Readvance, their various termini being represented today by clear lateral and end moraines at fourteen out of twenty-five locations. In nine cases, multiple lateral and/or end moraines suggest fluctuation of these ice margins during the Stadial maximum. An earlier stage of glaciation not related to the Late-Devensian ice-sheet maximum is represented by a single moraine and glacial striae. It is believed that this substage probably occurred between 18,000 and 14,000 years ago. Former sea-level changes were investigated by accurate mapping and instrumental levelling of raised coastal features. Three major periods of formation were identified :- 1. A pre-glacial or interglacial stage, evidenced by a highlevel rock platform at 32 to 37 m O.D.; 2. Raised beaches and deltas lying between 21 and 28 m O.D. relating to a period of very early Lateglacial deglaciation; 3. Postglacial features lying below about 10 m O.D. Pollen analysis of core sequences from two sites helped confirm the Loch Lomond Readvance age of the end moraines in Strath a' Bhathaich and to elucidate the history of vegetational development in the area between ca. 13,000 and 9,000 B.P. The Lateglacial pollen diagram indicates early development of a treeless Empetrum- dominated landscape that reverted during the Stadial to tundra-like conditions with a floristically-poor, open vegetation. Both Postglacial diagrams indicate a rapid recovery in early Postglacial times, with the return of pioneer species shortly superceded by a closed vegetation, and then by immigration of birch trees, and the establishment of a mixed birch-hazel woodland. |
author2 |
Newey, W. W. Sissons, J. B. |
format |
Doctoral or Postdoctoral Thesis |
author |
Robinson, Mary |
author_facet |
Robinson, Mary |
author_sort |
Robinson, Mary |
title |
Glacial limits, sea-level changes and vegetational development in part of Wester Ross |
title_short |
Glacial limits, sea-level changes and vegetational development in part of Wester Ross |
title_full |
Glacial limits, sea-level changes and vegetational development in part of Wester Ross |
title_fullStr |
Glacial limits, sea-level changes and vegetational development in part of Wester Ross |
title_full_unstemmed |
Glacial limits, sea-level changes and vegetational development in part of Wester Ross |
title_sort |
glacial limits, sea-level changes and vegetational development in part of wester ross |
publisher |
The University of Edinburgh |
publishDate |
1977 |
url |
http://hdl.handle.net/1842/10613 |
long_lat |
ENVELOPE(-125.746,-125.746,54.239,54.239) |
geographic |
Loch Lomond |
geographic_facet |
Loch Lomond |
genre |
Ice Sheet Tundra |
genre_facet |
Ice Sheet Tundra |
op_relation |
The University of Edinburgh. College of Science and Engineering http://hdl.handle.net/1842/10613 |
_version_ |
1772815514997882880 |