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Pre-Devonian stratigraphy and structure of the Prion Beach-Rocky Boat Inlet-Osmiridium Beach coastal section, southern Tasmania

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Berry, RF and Harley, S (1983) Pre-Devonian stratigraphy and structure of the Prion Beach-Rocky Boat Inlet-Osmiridium Beach coastal section, southern Tasmania. Papers and Proceedings of the Royal Society of Tasmania, 117. pp. 59-75. ISSN 0080-4703

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Abstract

The pre-Devonian stratigraphy of the Prion Beach to Surprise Bay area is composed of
four stratigraphic units. The oldest is a (?) Precambrian, slightly metamorphosed,
massive dolomite. This is in part the source area for three overlying units of the
Denison Group (Late Cambrian to Early Ordovician). The Tyler Creek Beds are highly serpentinitic
conglomerate, sandstone and siltstone. The Point Vivian Formation is a
sequence of dolomitic siltstone and matrix rich polymictic conglomerates with a wide range
of depositional features including channels, graded bedding and slump structures. It was
probably deposited in a slope environment. The overlying Wierah Formation (Denison Group)
is composed of quartz-rich pebbly sandstones and quartz arenites which formed in a high
energy environment possibly above wave base. Two shear zones cut across this stratigraphy
producing transposed layers and boudins. At least one of these shear zones was active
during sedimentation and forms the western limit of the Point Vivian Formation in this area.

Item Type: Article
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
Page Range: pp. 59-75
ISSN: 0080-4703
Collections: Royal Society Collection > Papers & Proceedings of the Royal Society of Tasmania
Additional Information:

Copyright Royal Society of Tasmania

Date Deposited: 25 May 2012 03:57
Last Modified: 18 Nov 2014 04:35
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