Many thanks - confirming what I thought. The other advantage of point counting is that you are looking at the rock and noticing other features along the way.
Some reliable method of grain size quantification would be useful though (overcoming the randomness of grain orientations etc.)
Rob Willan
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Dr Robert CR Willan,
Magmatic-Hydrothermal Processes
Geological Sciences Division,
British Antarctic Survey,
Cambridge CB3 0ET, UK
Tel: 01223 221420
FAX: 01223 362616
Email: [log in to unmask]
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