Skip to main content
placeholder image

The relationship of structures across the Lambian unconformity near Taralga, New South Wales

Journal Article


Abstract


  • The structures across the Lambian Unconformity near Taralga show evidence of two, and possibly three, significant episodes of folding. The first, Early to Middle Silurian folding is poorly defined, but may be responsible for initial dips that are reflected in the more complex deformation patterns in the Late Ordovician than in the overlying younger rocks. The second, mid-Devonian folding produced upright folds trending 10�� west of north, and the last, latest Devonian to Early Carboniferous folding produced the meridional Cookbundoon Synclinorium and the regional cleavage. No cleavage was associated with the first two episodes of folding in the area studied. The angular discordance across the Lambian Unconformity caused by mid-Devonian folding is much greater than in the northeastern Lachlan Fold Belt, and reflects the increasing intensity of mid-Devonian folding southward. The tight, slightly overturned profile of the Cookbundoon Synclinorium reflects an intensity of latest Devonian to Early Carboniferous folding similar to that found in the northeastern Lachlan Fold Belt, but the intensity of this folding decreases further south. �� Taylor & Francis Group, LLC.

Publication Date


  • 1979

Citation


  • McA. Powell, C., & Fergusson, C. L. (1979). The relationship of structures across the Lambian unconformity near Taralga, New South Wales. Journal of the Geological Society of Australia, 26(3-4), 209-219. doi:10.1080/00167617908729083

Scopus Eid


  • 2-s2.0-33845401230

Web Of Science Accession Number


Start Page


  • 209

End Page


  • 219

Volume


  • 26

Issue


  • 3-4

Place Of Publication


Abstract


  • The structures across the Lambian Unconformity near Taralga show evidence of two, and possibly three, significant episodes of folding. The first, Early to Middle Silurian folding is poorly defined, but may be responsible for initial dips that are reflected in the more complex deformation patterns in the Late Ordovician than in the overlying younger rocks. The second, mid-Devonian folding produced upright folds trending 10�� west of north, and the last, latest Devonian to Early Carboniferous folding produced the meridional Cookbundoon Synclinorium and the regional cleavage. No cleavage was associated with the first two episodes of folding in the area studied. The angular discordance across the Lambian Unconformity caused by mid-Devonian folding is much greater than in the northeastern Lachlan Fold Belt, and reflects the increasing intensity of mid-Devonian folding southward. The tight, slightly overturned profile of the Cookbundoon Synclinorium reflects an intensity of latest Devonian to Early Carboniferous folding similar to that found in the northeastern Lachlan Fold Belt, but the intensity of this folding decreases further south. �� Taylor & Francis Group, LLC.

Publication Date


  • 1979

Citation


  • McA. Powell, C., & Fergusson, C. L. (1979). The relationship of structures across the Lambian unconformity near Taralga, New South Wales. Journal of the Geological Society of Australia, 26(3-4), 209-219. doi:10.1080/00167617908729083

Scopus Eid


  • 2-s2.0-33845401230

Web Of Science Accession Number


Start Page


  • 209

End Page


  • 219

Volume


  • 26

Issue


  • 3-4

Place Of Publication