Pre‐basaltic topography of the Northern Monaro and its implications

Taylor, Graham R.; Bink, M.; Foudoulis, Chris; Gordon, Ira J.; Hedstrom, J.; Minello, J.; Whippy, F.

doi:10.1080/08120098508729313

Cited by 53 publications

(22 citation statements)

References 15 publications

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“…Uplift of the SE Australian highlands in the late Palaeozoic was enhanced in the late Cretaceous following rifting along the eastern continental margin (Bishop and Goldrick, 2000). Since mid-Miocene times the highlands have been tectonically stable with low rates of stream incision and denudation (Young, 1983;Taylor et al, 1985;Young and McDougall, 1985;Lambeck and Stephenson, 1986). The upper Lachlan exhibits a number of features diagnostic of flexure or faulting between the rising highlands and the subsiding Murray basin to the west, including a prominent "mountain front" and stream incision of b80 m that has produced terraces that converge downstream into low-gradient alluvial plains (Bishop and Brown, 1992;Bishop and Goldrick, 1992).…”

Section: The Murray-darling Basinmentioning

confidence: 98%

Downstream channel changes on a contracting, anabranching river: The Lachlan, southeastern Australia

Kemp

2010

Geomorphology

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Section: The Murray-darling Basinmentioning

confidence: 98%

Downstream channel changes on a contracting, anabranching river: The Lachlan, southeastern Australia

Kemp

2010

Geomorphology

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“…Compared with the East Victoria Highlands, the adjacent New South Wales alps and tablelands are considered to have been tectonically stable throughout most of the Cenozoic: Young (1977, Young & McDougall (1982, Bishop et al (1985), Bishop (1986), Taylor et al (1985, 1990 and Nott et al (1991) all postulated a mostly Mesozoic age for uplift. Others considered some uplift to be in response to Cenozoicaged denudational isostatic rebound (Bishop & Brown 1992), and Ollier & Taylor (1988) interpreted significant (up to 1 km) post-Oligocene uplift.…”

Section: Proposed Uplift Mechanismsmentioning

confidence: 99%

No mountains to snow on: major post-Eocene uplift of the East Victoria Highlands; evidence from Cenozoic deposits

Holdgate

Wallace

Gallagher

et al. 2008

Australian Journal of Earth Sciences

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“…Seaward flowing rivers have enough erosive power to cut through the uplifting fault crests and will thus not be influenced. Interestingly, the only fault systems in SE Australia for which Tertiary stream diversion has been demonstrated are the Lake George and Murrumbidgee faults, both located some 10 km west of the drainage divide [Abell, 1985;Taylor et al, 1985]. Although movement on other inland faults, further from the divide, appears to have influenced river profiles [Bishop and Brown, 1992;Bishop and Goldrick, 1998], it has not led to drainage rearrangement.…”

Section: Influence Of Lithology and Faultingmentioning

confidence: 99%

Controls on post‐mid‐Cretaceous landscape evolution in the southeastern highlands of Australia: Insights from numerical surface process models

Beek¹,

Braun²

1999

J. Geophys. Res.

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Abstract. The tectonic and geomorphic evolution of the southeastern Australian highlands has been a subject of controversy among geophysicists, geologists, and geomorphologists for several decades. We employ a numerical surface process model that includes long-range fluvial transport, hillslope diffusion, and landsliding, in order to quantitatively assess the tectonic, lithological, and structural controls on the landscape evolution and denudation history of SE Australia. We constrain fluvial erosion parameters for our model by fitting river profiles. Rockfall and landsliding are the most important processes controlling the concentration of erosion in river valleys. We therefore model hillslope evolution using a very low diffusion coefficient and a threshold slope for landsliding. The "initial" (prebreakup) topography of the highlands provides a fundamental control on their subsequent evolution, together with the style and rate of fluvial incision. Secondary controls are exerted by lateral variations in lithology and local tectonic uplift along faults. Our modeling results indicate that (1) the observed highlands morphology requires that the drainage divide was established at its present location prior to opening of the Tasman Sea; whether the divide is inherited from Paleozoic orogeny or resulted from Mesozoic syn-rift uplift cannot be established, however; (2) in contrast to traditional interpretations, escarpment retreat does not appear to be the fundamental process eroding the highlands; and (3) the observed barbed river drainage may be imprinted as a result of lithological variation; it does not necessarily evolve through capture. The driving mechanism that is most consistent with the inferred uplift pattern of the southeastern highlands appears to be magmatic underplating.

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Pre‐basaltic topography of the Northern Monaro and its implications

Cited by 53 publications

References 15 publications

Downstream channel changes on a contracting, anabranching river: The Lachlan, southeastern Australia

Downstream channel changes on a contracting, anabranching river: The Lachlan, southeastern Australia

No mountains to snow on: major post-Eocene uplift of the East Victoria Highlands; evidence from Cenozoic deposits

Controls on post‐mid‐Cretaceous landscape evolution in the southeastern highlands of Australia: Insights from numerical surface process models

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