A comment by Diane E. Lane about
I offer the following as an example of one agency's attempt to standardize on rock classifications: According to the OGS Editorial Guide (Ontario Geological Survey Miscellaneous Paper), fourth edition,1996, p. 56, the submission standards for final maps recommend that "The map and legend terminology agrees with that in 'Volcanic Rock Classification in Precambrian Geology Reports,' 'Sedimentary Rock Classification in Precambrian Geology Reports," and recommendations of the IUGS Subcommission on the Systematics of Igneous Rocks in A. Streckeisen's 'To Each Plutonic Rock its Proper Names,' from Earth Science Reviews, vol. 12, p. 1-33, 1976." I suspect that the first two references are in-house references; the Streckeisen is well known and often cited by USGS geologists. I wonder if it would be useful to take a poll of which state and provincial surveys (as well as the Canadian Geological Survey) actually have a standard and what it or they might be. Let us see what the variety is. That would be a clue as to how practicable it might be to standardize across the discipline.
Further discussion of Classification standard at the Ontario Geological Survey (this page):
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