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Stratigraphic significance of a discovery of Lower Proterozoic tuff in the Pine Creek Geosyncline

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Created 14/01/2025

Updated 14/01/2025

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Recent investigations in the Pine Creek Geosyncline in the northern part of the Northern Territory have revealed the presence of tuff within the Lower Proterozoic metasediments (Needham and others, 1978). The tuff is confined to one horizon, and crops out in the central and eastern parts of the Geosyncline, enabling stratigraphic correlations to be made between formations previously believed to have been deposited in two separate basins. Previous workers believed different kinds of sediment were laid down in each basin, and that only limited correlation was possible between the basins (Walpole and others, 1968). The regional stratigraphic concept of earlier workers was dominated by lateral and lesser vertical facies inter-fingering of units (formations), which were placed into groups, each of which contained a number of laterally disposed, lithogenetically related formations (Walpole and others, 1968). Tuff, by its depositional nature, is a time-stratigraphic indicator, so its regional conformity with metasedimentary units in the Geosyncline suggests that they are also time-stratigraphic in character, and not facies equivalents or time-transgressive as proposed previously.

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Title Stratigraphic significance of a discovery of Lower Proterozoic tuff in the Pine Creek Geosyncline
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/c45b6822-5d09-42b8-8c8f-44d848d0bf8f
Contact Point
Geoscience Australia
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage {"type": "Polygon", "coordinates": [[[131.3, -13.5], [132.5, -13.5], [132.5, -13.0], [131.3, -13.0], [131.3, -13.5]]]}
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