Blairmorite

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Blairmorite
melanite, nepheline

Blairmorite is a very rare

foidite).[4] Blairmorite has also been described as an analcime-rich variety of phonolite.[5][6]

This

extrusive igneous rock is known from only two geological formations worldwide. The foremost blairmorite occurrence is the Crowsnest Formation in the Canadian province of Alberta where it is associated with agglomerates and tuffs from explosive eruptions. The other locality is the Lupata Gorge in Mozambique.[2]

References

  1. ISBN 0-582-30082-7.{{cite book}}: CS1 maint: multiple names: authors list (link
    )
  2. ^ a b Pearce, T.H. (1993). "Analcime phenocrysts in igneous rocks: Primary or secondary? – Discussion" (PDF). American Mineralogist. 78: 225–229.
  3. ^ Johannsen, A. 1933. A descriptive petrography of the igneous rocks, Appendix III, p. 244. Univ. of Chicago Press.
  4. ISBN 0-521-66215-X. {{cite book}}: |author= has generic name (help
    )
  5. ^ Peterson, T.D.; Currie, K.L. (1993). Analcite-bearing igneous rocks from the Crowsnest Formation, southwestern Alberta (Current Research report 93-B1) (PDF). Geological Survey of Canada. pp. 51–56.
  6. ISBN 9780903056274
    .
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