http://earthwise-staging.bgs.ac.uk/index.php?action=history&feed=atom&title=The_minor_intrusions_of_the_Skye_Central_Complex 2026-04-17T19:33:10Z Revision history for this page on the wiki MediaWiki 1.42.3 http://earthwise-staging.bgs.ac.uk/index.php?title=The_minor_intrusions_of_the_Skye_Central_Complex&diff=35166&oldid=prev 2018-02-02T21:48:14Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 22:48, 2 February 2018</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l3">Line 3:</td> <td colspan="2" class="diff-lineno">Line 3:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[File:GSG_SKYE_04.jpg|thumbnail|Figure 4 Geological sketch-map of the Cuillin Complex]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[File:GSG_SKYE_04.jpg|thumbnail|Figure 4 Geological sketch-map of the Cuillin Complex]]</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[File:GSG_SKYE_21.jpg|thumbnail|Figure 19b Excursion  5 Kilchrist. Ignimbrite outcrops, location map]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[File:GSG_SKYE_21.jpg|thumbnail|Figure 19b Excursion  5 Kilchrist. Ignimbrite outcrops, location map]]</div></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div> </div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">== Chapter 9 The minor intrusions ==</ins></div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== (A) Introduction ==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== (A) Introduction ==</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> </table>

Scotfot http://earthwise-staging.bgs.ac.uk/index.php?title=The_minor_intrusions_of_the_Skye_Central_Complex&diff=35142&oldid=prev 2018-02-02T21:22:46Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 22:22, 2 February 2018</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l186">Line 186:</td> <td colspan="2" class="diff-lineno">Line 186:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Deformed basic and acid igneous sheets within Cambro-Ordovician dolostones (see Section [[Pre-Palaeogene rocks of the Isle of Skye#(D) Cambro-Ordovician sedimentary rocks|(2D)]] of Chapter 2) around the margins of the Beinn an Dubhaich granite intrusion (see Section [[The Eastern Red Hills Centre, Skye Central Complex#(F) The Outer Granite|(7F)]] of Chapter 7) have been described by Nicholson (1970, 1985) and Longman and Coward (1979). These minor intrusions are boudinaged and folded and this deformation has been attributed to radial compressive forces emanating from the western part of the granite intrusion, presumably during its emplacement. Boudin necks within these dykes (for example, at Camas Malag) show evidence of chilling, suggesting that the deformation took place before the intrusions had completely crystallised. Other examples may be examined at Dun Beag, on Loch Slapinside, and around the old manse at Kilchrist.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Deformed basic and acid igneous sheets within Cambro-Ordovician dolostones (see Section [[Pre-Palaeogene rocks of the Isle of Skye#(D) Cambro-Ordovician sedimentary rocks|(2D)]] of Chapter 2) around the margins of the Beinn an Dubhaich granite intrusion (see Section [[The Eastern Red Hills Centre, Skye Central Complex#(F) The Outer Granite|(7F)]] of Chapter 7) have been described by Nicholson (1970, 1985) and Longman and Coward (1979). These minor intrusions are boudinaged and folded and this deformation has been attributed to radial compressive forces emanating from the western part of the granite intrusion, presumably during its emplacement. Boudin necks within these dykes (for example, at Camas Malag) show evidence of chilling, suggesting that the deformation took place before the intrusions had completely crystallised. Other examples may be examined at Dun Beag, on Loch Slapinside, and around the old manse at Kilchrist.</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">==[[Excursion guide to the geology of the Isle of Skye#References|References]] ==</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">== [[Glossary of petrological names and terms found on the Isle of Skye|Appendix 1: Glossary of petrological names and terms]] ==</ins></div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>==[[<del style="font-weight: bold; text-decoration: none;">Excursion guide to </del>the <del style="font-weight: bold; text-decoration: none;">geology </del>of the Isle of Skye<del style="font-weight: bold; text-decoration: none;">#References</del>|<del style="font-weight: bold; text-decoration: none;">References</del>]] ==</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>== [[<ins style="font-weight: bold; text-decoration: none;">Glossary of fossil names found on </ins>the <ins style="font-weight: bold; text-decoration: none;">Isle </ins>of <ins style="font-weight: bold; text-decoration: none;">Skye|Appendix 2: Glossary of fossil names]] ==</ins></div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div> </div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">== [[Glossary of place names and grid references found on </ins>the Isle of Skye|<ins style="font-weight: bold; text-decoration: none;">Appendix 3: Glossary of place names and grid references</ins>]] ==</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>{{EGwalks}}</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>{{EGwalks}}</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[Category:3. Palaeogene volcanic districts of Scotland]]</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>[[Category:3. Palaeogene volcanic districts of Scotland]]</div></td></tr> </table>

Scotfot http://earthwise-staging.bgs.ac.uk/index.php?title=The_minor_intrusions_of_the_Skye_Central_Complex&diff=34988&oldid=prev 2018-02-01T23:55:21Z

<p><span dir="auto"><span class="autocomment">(M) The pitchstone dykes</span></span></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 00:55, 2 February 2018</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l162">Line 162:</td> <td colspan="2" class="diff-lineno">Line 162:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Harker (1904) also reports a group of dykes which he regards as altered pitchstones. They are most abundant east of Beinn na Caillich and are referred to as the Coire-chat-achan type. They are readily identified by their dull grey-brown colour and contain spherules along marginal facies, giving rise to a &quot;rodded&quot; structure. In thin-section the bulk of these dykes consists of pale yellow, altered glass, with scattered microphenocrysts of sanidine and augite.</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Harker (1904) also reports a group of dykes which he regards as altered pitchstones. They are most abundant east of Beinn na Caillich and are referred to as the Coire-chat-achan type. They are readily identified by their dull grey-brown colour and contain spherules along marginal facies, giving rise to a &quot;rodded&quot; structure. In thin-section the bulk of these dykes consists of pale yellow, altered glass, with scattered microphenocrysts of sanidine and augite.</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker" data-marker="−"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>The main difference between the Coire-chat-achan pitchstone dykes and the others noted above may be one of age, as the former most likely pre-date the granites, and therefore have been subjected to the intense hydrothermal alteration associated with these large intrusions (see Section (12F) of Chapter 12).</div></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>The main difference between the Coire-chat-achan pitchstone dykes and the others noted above may be one of age, as the former most likely pre-date the granites, and therefore have been subjected to the intense hydrothermal alteration associated with these large intrusions (see Section <ins style="font-weight: bold; text-decoration: none;">[[Origin of the magmas and the hydrothermal systems associated with the Skye Central Complex#(F) Hydrothermal systems associated with the Skye Centre|</ins>(12F)<ins style="font-weight: bold; text-decoration: none;">]] </ins>of Chapter 12).</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== (N) The leidleite dyke of the Tungadal River ==</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== (N) The leidleite dyke of the Tungadal River ==</div></td></tr> </table>

Scotfot http://earthwise-staging.bgs.ac.uk/index.php?title=The_minor_intrusions_of_the_Skye_Central_Complex&diff=34986&oldid=prev 2018-02-01T23:50:37Z

<p>Created page with &quot;{{GSGSkye}} <a href="/index.php/File:GSG_SKYE_11.jpg" title="File:GSG SKYE 11.jpg">thumbnail|Figure 11 Geological sketch-map of the Creagan Dubh and Kilchrist pyroclastic deposits</a> File:GSG_SKYE_04.jpg|thumbnail|Figure 4...&quot;</p> <a href="http://earthwise-staging.bgs.ac.uk/index.php?title=The_minor_intrusions_of_the_Skye_Central_Complex&amp;diff=34986">Show changes</a>

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