BETA

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  1. Vein Aleutian Marble

    ... rounded to sub-rounded crystal, imparting an overall porphyroblastic texture. Crystal orientation is random in both groundmass and ...

    Raven Mueller - 2015-08-12

  2. Montclair

    ... with foliated masses of accessory minerals and some larger porphyroblastic carbonate, quartz and feldspar grains. Maximum ...

    Ed FitzGerald - 2015-09-05

  3. Buckingham

    ... of relatively larger quartz/feldspar. This imparts a porphyroblastic appearance to the slide. Opaque minerals are present with a ... of relatively larger quartz/feldspar. This imparts a porphyroblastic appearance to the slide. Opaque minerals are present with a ...

    Ed FitzGerald - 2015-09-04