http://earthwise-staging.bgs.ac.uk/index.php?action=history&feed=atom&title=File%3AP991528.jpgFile:P991528.jpg - Revision history2026-04-17T00:01:53ZRevision history for this page on the wikiMediaWiki 1.42.3http://earthwise-staging.bgs.ac.uk/index.php?title=File:P991528.jpg&diff=43282&oldid=prevScotfot: User created page with UploadWizard2019-11-05T10:35:14Z<p>User created page with UploadWizard</p>
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|description={{en|1=Figure 21A The contact of an angular dolerite block cut by microgranite runs diagonally across the picture. The dolerite is unchilled, and the yellow staining (with sodium cobaltinitrate) illustrates the extent to which K-feldspar, derived from the microgranite, has developed in the dolerite margin. S64806 from quarry, plane-polarised light.<br />
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|date=2019-11-05 10:28:50<br />
|source=British Geological Survey<br />
|author=British Geological Survey<br />
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