Friday, October 26, 2007

Digital fold axis data for Oregon?

For some time, I've been wanting to look at the relationship between landslide distribution and structural features of our study region. I'd been thinking I'd look at proximity of landslides to fold axes, because it was fixed in my mind that digital fold axis data exist for Oregon, whereas digital strike and dip data do not. However, when I sat down to start figuring out how to do this analysis, I could find no such data. I plumbed the metadata and coverages associated with the 1991 Walker and MacLeod 1:500,000 map, as well as the info about the latest DOGAMI digital geology compilation. Nothing. Did I just fabricate this idea that fold axis data exist?? Does anyone have or know of digital data for central/eastern Oregon that might give clues about stratigraphic attitudes (there's a bit of info about fault plane dips, but that's all I could find)?
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3 comments:

  1. Dr. JerqueOctober 27, 2007 at 9:12 AM

    Liz,

    I googled it and got some bites of possible relevance:

    http://www.oregon.gov/DAS/EISPD/GEO/fit/geoscience/docs/data_content_draft.pdf
    http://www.google.com/url?sa=t&ct=res&cd=8&url=http%3A%2F%2Fwww.oregon.gov%2FDAS%2FEISPD%2FGEO%2Ffit%2Fgeoscience%2Fdocs%2Fdata_content_draft.pdf&ei=3GIjR-ifNpCkgQPO6tS9CA&usg=AFQjCNF9NThI7Kem1C5PSfirbO3VUyXphA&sig2=aCYZmuogWhanqA1S2SsuPg

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  2. Liz SafranOctober 29, 2007 at 10:53 AM

    Hi, Kyle,

    Yes, I saw this document, but I'm afraid it's just describing a fantasy. I'm trying to get to the bottom of the question through DOGAMI.

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  3. Liz SafranOctober 29, 2007 at 2:29 PM

    So, it turns out DOGAMI has been waiting to release the fold data until they do the compilation for the SW part of the state, since most of the folds in the state are in the Klamaths. That portion of the compliation is almost done. It was supposed to be released in 2007, but it looks like it will be delayed and released early next year. In the meantime, however, DOGAMI has generously offered to let me work with existing fold data, which is currently attributed but as yet has no metadata associated w/it. So, I guess I will have that in a few days. I'll keep y'all posted.

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