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Clarify textural terms for lithologic patterns

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    Leslie McWhirter

    Hello Jon,

    I have added your vote to our suggestion file for a consistent naming scheme.

    All of the USCS patterns you've mentioned are missing are included in the Keyword (USCS).SCH scheme file included in Strater's sample file. Click the Open Scheme button in the Scheme Editor to load this SCH file. You also mentioned that some of the patterns are incorrect. Please let me know which ones are incorrect and what they should be instead, and I will file a ticket to fix it.

    Thanks!

    Leslie McWhirter

    Technical Support

    Golden Software

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    Jon F. Kaminsky

    Hi Leslie- thanks for the tip on the USCS scheme file, helpful.  As far as the USCS symbology goes, this is admittedly difficult to get at. The standard as published as ASTM 2487 does not show hatchure patterns.  There are sources on the internet some of which appear to be non-authoritative, or have customized the scheme for their own purposes or introduce colors for several of the patterns (e.g., Caltrans).  The seemingly most reliable scheme is probably the Army Corp of Engineers standard boring log, where at least it is consistent across all the documents that I have seen that use it (reference Army Field Manual FM 5-472, appendix B).  I think the key here, again is consistency.  For example, GSI's symbol for peat, is horizontal lines with an olive-brown color.  I know of no published scheme which specifies peat like that. Caltrans uses a marsh symbol (I would discourage any genetically-derived/facies symbol such as this), and the corps symbol appears to be similar to GSI's zigzag pattern. 

    As far as the USGS 100 series descriptions go, I'll attach a separate doc listing what I believe are appropriate changes.

    Jon

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    Jon F. Kaminsky

    because I am limited here to image files here are some documented screen captures of what I see as needing some clarification.  Thanks!














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    Leslie McWhirter

    Hi Jon,

    Thanks for the clarification! I've added your vote to our suggestion file for improving/clarifying these USCS fill patterns.

    Thanks!

    Leslie

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