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The amygdale minerals in the Tertiary lavas of Ireland. IV. The crystal habit of calcite

Published online by Cambridge University Press:  14 March 2018

G. P. L. Walker*
Affiliation:
Dept. of Geology, Imperial College, London S.W. 7

Summary

Calcite is widespread in amygdales associated with the zeolites; the characteristic forms being and a steep scalenohedron in the zone , usually . Crystals from one locality have faces of , a form new to calcite.

Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1960

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References

Goldschmidt, (V.), 1913. Atlas der Krystallformen, pt. II.Google Scholar
Palache, (C.), 1943. Contrib. Dept. Min. & Petr., Harvard Univ., No. 259.Google Scholar
Smith, (G. F. H.), Ashcroft, (F.N.), and Prior, (G.T.), 1916. Min. Mag., vol. 17, p. 274.Google Scholar
Walker, (G. P. L.), 1959. Quart. Journ. Geol. Soc., vol. 114, p. 379.Google Scholar
Walker, (G. P. L.), 1960. Min. Mag., vol 32, p. 503.Google Scholar