Tectonically deformed sand volcanoes in a Precambrian greywacke, Northern Territory of Australia

Malcolm R. Walter

doi:10.1080/00167617208728777

Tectonically deformed sand volcanoes in a Precambrian greywacke, Northern Territory of Australia

Malcolm R. Walter^*

^*Corresponding author for this work

Research output: Contribution to journal › Article

9 Citations (Scopus)

Abstract

Structures previously described as umbrella-shaped probable fossils are shown to be tectonically deformed cylindrical to conical sand volcanoes. They occur in the upper parts of greywacke beds in the middle Precambrian Pine Creek Geosyncline. The anisotropy caused by the occurrence of the volcanoes resulted in the localization of stresses during the deformation of the geosynclinal sequence, causing the formation of radial and concentric fractures in each of the volcanoes.

Original language	English
Pages (from-to)	395-399
Number of pages	5
Journal	Journal of the Geological Society of Australia
Volume	18
Issue number	4
DOIs	https://doi.org/10.1080/00167617208728777
Publication status	Published - 1972
Externally published	Yes

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abstract = "Structures previously described as umbrella-shaped probable fossils are shown to be tectonically deformed cylindrical to conical sand volcanoes. They occur in the upper parts of greywacke beds in the middle Precambrian Pine Creek Geosyncline. The anisotropy caused by the occurrence of the volcanoes resulted in the localization of stresses during the deformation of the geosynclinal sequence, causing the formation of radial and concentric fractures in each of the volcanoes.",

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