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Abstract

We may think of the Plateau as consisting of two main,
nearly horizontal, layers of rock resting on a basement of older,
steeply tilted rocks. The surface layer, a few hundred metres
thick, is dolerite about 165 million years old. This was injected
into marine and non-marine sedimentary rocks deposited during
a span of about 90 million years beginning about 290 million
years ago. The part of this sequence originally over the dolerite
has been removed by erosion, that beneath the dolerite is
preserved as an almost continuous band around the northern base
of the Plateau from Travellers Range to Table Mountain. The
basement consists of metamorphic, sedimentary and igneous rocks
some older than 570 million years, intruded by granite over 480
million years ago and again about 345 million years ago, and
folded into a mountain range about 370 million years ago.

Item Type:	Article
Authors/Creators:	Banks, MR
Keywords:	Royal Society of Tasmania, RST, Van Diemens Land, natural history, science, ecology, taxonomy, botany, zoology, geology, geography, papers & proceedings, Australia, UTAS Library
Journal or Publication Title:	Papers and Proceedings of the Royal Society of Tasmania
ISSN:	0080-4703
DOI / ID Number:	https://doi.org/10.26749/rstpp.106.1.25
Collections:	Royal Society Collection > Papers & Proceedings of the Royal Society of Tasmania
Additional Information:	Edited by M.R. Banks.- Copyright Royal Society of Tasmania
Item Statistics:	View statistics for this item

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