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Snapshots

  1. Thunderbird Rhyolite

    Snapshot Title: Thunderbird Rhyolite
    Taken by: joshuaiv

    Image: Chip suite, El Paso region geology
    Image Owner: Callan Bentley



    Description:

    Part of the Precambrian suite of rocks in the El Paso is the Thunderbird Group. It is younger (953-980 m.y.o)than the Red Bluff Granite indicating that the two rock units are related and that the Red ...



  2. Castner Marble

    Snapshot Title: Castner Marble
    Taken by: joshuaiv

    Image: Chip suite, El Paso region geology
    Image Owner: Callan Bentley



    Description:

    One of the more spectacular units on the Franklin Mountains is the Castner Fm. It is a 1400 ft thick exposed xenolith of marble inside the Red Bluff Granite complex. The Castner contains its original ...



  3. Red Bluff Granite Pegmatite #2

    Snapshot Title: Red Bluff Granite Pegmatite #2
    Taken by: joshuaiv

    Image: Chip suite, El Paso region geology
    Image Owner: Callan Bentley



    Description:

    See description above.



  4. Crinoidal meta-limestone- Oro Grande NM

    Snapshot Title: Crinoidal meta-limestone- Oro Grande NM
    Taken by: joshuaiv

    Image: Chip suite, El Paso region geology
    Image Owner: Callan Bentley



    Description:

    Lower Permian limestone that is thoroughly metamorphosed by intrusives of probable Tertiary age. The limestone contains bivalves, crinoids, bryozoa, and some corals, which are indicative of a of shal...



  5. Mundy Breccia

    Snapshot Title: Mundy Breccia
    Taken by: joshuaiv

    Image: Chip suite, El Paso region geology
    Image Owner: Callan Bentley



    Description:

    Part of the Pre-Cambrian suite of rocks in the Franklin Mountains the Mundy Breccia is a unit that consists of boulder-like masses of basalt embedded in a fine-grained mafic matrix. The Mundy sits on ...



  6. Red Bluff Granite Pegmatite

    Snapshot Title: Red Bluff Granite Pegmatite
    Taken by: joshuaiv

    Image: Chip suite, El Paso region geology
    Image Owner: Callan Bentley



    Description:

    Red Bluff Granites (5 total) are a suite of petrographically distinct granite phases that range from .98 -1.0 billion in age. The riebeckite pegmatite is one of these granites that contains large (>2c...



  7. Muleros Andesite

    Snapshot Title: Muleros Andesite
    Taken by: joshuaiv

    Image: Chip suite, El Paso region geology
    Image Owner: Callan Bentley



    Description:

    Large emplacements of andesitic plutons mark the end of Laramide deformation in the El Paso region. Geophysical studies suggest that these bodies were placed in the El Paso region due to the fact that...



  8. 1 cm Scale

    Snapshot Title: 1 cm Scale
    Taken by: Callan Bentley

    Image: Chip suite, El Paso region geology
    Image Owner: Callan Bentley



    Description:

    This box is 1 centimeter across