Specimen Details

  • Collection Names

    Krantz M&P Collection (K45)

  • Number Of Specimens

    1

  • Specimen Nature

    Hand Specimen

  • Rock Name

    Phonolite

  • Rock Class

    Igneous

  • Rock Group

    Volcanic

  • Rock Description

    A very fine grained, equigranular black rock with a slight greenish tint. Tinguaite. A variety of phonolite consisting of alkali feldspar, nepheline with or without other foids, aegirine and sometimes biotite and characterised by "tinguaitic texture" in which needles of aegirine occur intestitially in a mozaic of alkali feldspar and foids.

  • Category

    Natural Sciences

  • Scientific Group

    Geology

  • Discipline

    Petrology

  • Collecting Areas

    Rocks and Ores

  • Type of Item

    Specimen

Geospatial Information