- Title
- The geology of the Rouchel Basin, N.S.W.
- Creator
- Parkinson, B. A.
- Resource Type
- thesis
- Date
- 1969
- Description
- Bachelor Honours - Bachelor of Science (Honours)
- Description
- The author has mapped an area of approximately 50 square miles north-east of Muswellbrook, N.S.W. The major structure of the area is the Rouchel Basin, which is partly depositional, partly tectonic in origin and contains rocks of the lower Carboniferous system. The system commences with a sequence of marine and nearshore mudstones, limestones and grenites, grouped into the Dunbar Creek Beds. Conformably overlying are rocks of the Dyrring Formation, a suite of terrestrial arenites and conglomerates accumulated in a local, rapidly subsiding basin. Intense local vulcanism is marked by a number of andesitic and dacitic ignimbrite units, and tuffs and tuffaceous sediments. Thirteen ignimbrite members have been defined. Of these, only three are able to be correlated with volcanic units further east, because of a progressive shift in the locus of deposition from the Rouchel Basin eastwards. An examination of the sediments and volcanics has shown that they are similar to those elsewhere in the Dyrring Formation through stratigraphically distinct through wedging and lensing out. One fossiliferous marine intercalation occurs in the thickest part of the sequence, containing an abundant brachipod and coral fauna. Compressive and shear movements associated with the Hunter-Bowen orogenic movements and the development of the Hunter Thrust system, have faulted the basin marginally.
- Subject
- Rouchel Basin; Muswellbrook; geology
- Identifier
- http://hdl.handle.net/1959.13/1312832
- Identifier
- uon:22469
- Rights
- Copyright 1969 B. A. Parkinson
- Language
- eng
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