Skip to main content
placeholder image

Structure of the Late Palaeozoic Coffs Harbour Beds, northeastern New South Wales

Journal Article


Abstract


  • F1macroscopic folds in the Late Palaeozoic Coffs Harbour Beds in the SE portion of the New England Fold Belt are commonly transected by cleavage. These macroscopic folds are tight to isoclinal structures, with a consistent vergence to the NE. Axial surfaces are either steeply dipping to the SW or vertical, and are typically faulted. Anomalous bedding-cleavage relations occur where the steeply dipping cleavage intersects overturned limbs of F1macroscopic and some F1mesoscopic folds. Elsewhere F1mesoscopic folds have a well developed, axial-surface cleavage and are rarely downward facing. Cleavage is commonly strike-divergent from axial surfaces of F1macroscopic folds, except adjacent to the Demon Fault System, where they are parallel. These anomalous cleavage-folds relations possibly developed during the one deformation. D1 structures are refolded by kink-like folds that are steeply plunging. The structural style of the D1 deformation indicates that it possibly resulted from accretionary processes at a consuming plate margin. �� Taylor & Francis Group, LLC.

Publication Date


  • 1982

Citation


  • Fergusson, C. L. (1982). Structure of the Late Palaeozoic Coffs Harbour Beds, northeastern New South Wales. Journal of the Geological Society of Australia, 29(1-2), 25-40. doi:10.1080/00167618208729191

Scopus Eid


  • 2-s2.0-0042887030

Start Page


  • 25

End Page


  • 40

Volume


  • 29

Issue


  • 1-2

Place Of Publication


Abstract


  • F1macroscopic folds in the Late Palaeozoic Coffs Harbour Beds in the SE portion of the New England Fold Belt are commonly transected by cleavage. These macroscopic folds are tight to isoclinal structures, with a consistent vergence to the NE. Axial surfaces are either steeply dipping to the SW or vertical, and are typically faulted. Anomalous bedding-cleavage relations occur where the steeply dipping cleavage intersects overturned limbs of F1macroscopic and some F1mesoscopic folds. Elsewhere F1mesoscopic folds have a well developed, axial-surface cleavage and are rarely downward facing. Cleavage is commonly strike-divergent from axial surfaces of F1macroscopic folds, except adjacent to the Demon Fault System, where they are parallel. These anomalous cleavage-folds relations possibly developed during the one deformation. D1 structures are refolded by kink-like folds that are steeply plunging. The structural style of the D1 deformation indicates that it possibly resulted from accretionary processes at a consuming plate margin. �� Taylor & Francis Group, LLC.

Publication Date


  • 1982

Citation


  • Fergusson, C. L. (1982). Structure of the Late Palaeozoic Coffs Harbour Beds, northeastern New South Wales. Journal of the Geological Society of Australia, 29(1-2), 25-40. doi:10.1080/00167618208729191

Scopus Eid


  • 2-s2.0-0042887030

Start Page


  • 25

End Page


  • 40

Volume


  • 29

Issue


  • 1-2

Place Of Publication