BETA

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  1. Weymouth

    ... to be lacking. Accessory minerals include biotite , pyroxene s, opaques, and muscovite . Together these minerals constitute 5 ...

    Ed FitzGerald - 2015-09-05

  2. Darney

    ... includes feldspar s, muscovite , mafic minerals ( pyroxene , amphibole , opaques), and lithic fragments. Based on these ...

    Ed FitzGerald - 2015-09-05

  3. Dakota Mahogany Brown Velvet

    ... at 5 to 10 percent of slide area. No amphibole s or pyroxene s are visible in this slide. Opaques are also relatively rare and ...

    Raven Mueller - 2015-08-12

  4. Blue Mountain Granite

    ... , biotite , garnet, opaques, amphibole s, and pyroxene s. Quartz and feldspar account for about 70 percent of slide area. ...

    Ed FitzGerald - 2015-09-04

  5. Sioux Quartzite

    ... under 1 percent. Only a few other accessory minerals ( pyroxene s) were noted on the slide. There are no appreciable signs of ...

    Raven Mueller - 2015-07-22

  6. Dakota Mahogany Whetstone

    ... muscovite , which is extremely rare. No amphibole s or pyroxene s are visible in this slide. Opaques are also relatively rare and ...

    Raven Mueller - 2015-08-12

  7. American Bouquet

    ... but is now significantly altered into iron oxides. No pyroxene s are visible in this slide. Opaques are also relatively rare and ...

    Raven Mueller - 2015-09-03

  8. Adirondack Granite

    ... biotite, garnet, opaques, and highly altered pyroxene s. Quartz and feldspar account for about 60 percent of slide area. ...

    Ed FitzGerald - 2015-09-04

  9. Dolph Pond Granite

    ... There is a localized area of other mafic minerals, likely pyroxene s and olivine, that are now heavily weathered into a variety of ...

    Ed FitzGerald - 2015-09-04