The Mount Read Volcanics and Cambrian‐Ordovician relationships at Queenstown, Tasmania
作者:
K. D. Corbett,
K. O. Reid,
E. B. Corbett,
G. R. Green,
K. Wells,
N. W. Sheppard,
期刊:
Journal of the Geological Society of Australia
(Taylor Available online 1974)
卷期:
Volume 21,
issue 2
页码: 173-186
ISSN:0016-7614
年代: 1974
DOI:10.1080/00167617408728842
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The Cambrian Mount Read Volcanics at Queenstown can be subdivided into three major units: (i) a central belt of quartz‐keratophyric lavas, consisting mainly of quartz and feldspar porphyries with lenses of massive potassic lava along the axial zone; (ii) a flanking belt of acid pyroclastic rocks which interfinger with sedimentary sequences of the Dundas Trough to the west and with the central lavas, and which are here termed the Queenstown Pyroclastics; and (iii) an unconformable Late Cambrian sequence of volcanic and sedimentary rocks here defined as the Tyndall Group. Important minor units are quartz‐feldspar porphyry and hornblende‐pyroxene porphyry intrusives and some newly‐discovered granitic bodies.
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