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Abstract

Tertiary aquagene volcanics at over forty localities in Tasmania concentrate in
three main regions. The North West Coast - Bass Strait islands examples are mostly
related to Miocene high seas. Phreatic tuffs and flow foot breccias erupted from
emergent vents (Cape Grim, Trefoil Island, Steep Island, Redpa, Brittons Swamp, Temma,
N. Robbins Island and possibly Wynyard. Pillowy lavas represent subaqueous phases
of emerging volcanoes (Flat Topped Bluff, S. Robbins Island and Black Pyramid Island).
The aquagene volcanics supplement data on levels and depositional depths of Niocene
seas and suggest relative levels now up to 110m (early Niocene), l30-l40m (early-mid
Miocene) and possibly 75m (late-mid Niocene?) above present sea level.

Item Type:	Article
Authors/Creators:	Sutherland, FL
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.114.177
Collections:	Royal Society Collection > Papers & Proceedings of the Royal Society of Tasmania
Additional Information:	Copyright Royal Society of Tasmania
Item Statistics:	View statistics for this item

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