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On Hauyne-Trachyte and allied rocks in the districts of Port Cygnet and Oyster Cove

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Twelvetrees, William Harper and Petterd, William Frederick (1898) On Hauyne-Trachyte and allied rocks in the districts of Port Cygnet and Oyster Cove. Papers & Proceedings of the Royal Society of Tasmania. pp. 3-26.

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Abstract

The igneous rock at Port Cygnet, in Southern Tasmania,
has been known for a long time by the name of felspar-porphyry.
As the porphyritic crystals of felspar are
rather strikingly displayed in the rock, specimens have
now and again, through collectors, found their way to
different parts of the Colony. Microscopical study of
some of these samples made us aware that the handsome
porphyries were soda-trachytes, and we classed them as
such in our last year's sketch of the igneous petrology of
Tasmania. Since then we have found the felspathoid
mineral haiiyne or nosean in them, which confirms our
previous determination, and a recent excursion to the
locality has enabled us to recognise quite a group of these
rocks, as well as to fix their geological age. Includes illustrations of transverse sections.

Item Type: Article
Keywords: Royal Society of Tasmania, Van Diemens Land, VDL, Hobart Town, natural sciences, proceedings, records
Journal or Publication Title: Papers & Proceedings of the Royal Society of Tasmania
Page Range: pp. 3-26
Collections: Royal Society Collection > Papers & Proceedings of the Royal Society of Tasmania
Additional Information:

In 1843 the Horticultural and Botanical Society of Van Diemen's Land was founded and became the Royal Society of Van Diemen's Land for Horticulture, Botany, and the Advancement of Science in 1844. In 1855 its name changed to Royal Society of Tasmania for Horticulture, Botany, and the Advancement of Science. In 1911 the name was shortened to Royal Society of Tasmania.

Date Deposited: 14 Mar 2013 03:23
Last Modified: 18 Nov 2014 04:49
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