Specimen Details

  • Number Of Specimens


  • Specimen Nature

    Hand Specimen

  • Rock Name

    Olivine-Diopside-Richterite-Phlogophite-Leucite Lamproite

  • Rock Class


  • Rock Group


  • Rock Description

    A medium grained specimen composed of brown phologphyte fragments in a matrix of green minerals Mount North is about 15 kilometres south-east of the Gibb River Road and Fairfield-Leopold Downs Road intersection. The hill looks like an old volcano. It is structurally similar to the 81 Mile Vent Mindat locality nearby. It is a sequence of pyroclastics intruded by thin sills of fine grained olivine-leucite lamproite. There is a late central core of medium grained olivine-diopside-potassic richterite-leucite lamproite. The proportion of pyroclastics however is less than at 81 Mile Vent. The central core forms a columnar jointed mass up to 90 metres above the surrounding plain.

  • Category

    Natural Sciences

  • Scientific Group


  • Discipline


  • Collecting Areas

    Rocks and Ores

  • Type of Item


Geospatial Information