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Full-Text Articles in Social and Behavioral Sciences
Early Silurian Graptolites From Cadia, New South Wales, R B. Rickards, Anthony J. Wright
Early Silurian Graptolites From Cadia, New South Wales, R B. Rickards, Anthony J. Wright
Faculty of Science, Medicine and Health - Papers: part A
A low-diversity graptolite fauna is reported from the Ulah Formation at Cadia, central western New South Wales. The assemblage includes Testograptus testis, Monoclimacis flumendosae, fragments of Monograptus flemingii, possible Cyrtograptus and unidentifiable retiolitid meshworks, and is correlated with the lungrenitestis Biozone, of late Wenlock (Early Silurian) age.
Wenlock (Early Silurian) Brachiopods From The Orane District Of New South Wales, Anthony J. Wright, Des L. Strusz
Wenlock (Early Silurian) Brachiopods From The Orane District Of New South Wales, Anthony J. Wright, Des L. Strusz
Faculty of Science, Medicine and Health - Papers: part A
Two late Wenlock (Early Silurian) brachiopod species from the Ulah Formation near Orange, New South Wales, are closely associated with graptolite faunas. Visbyella cumnockensis occurs in the testis Biozone on Wallace Creek in the Four Mile Creek area, and Strophochonetes melbournensis is recorded from the ludensis Biozone on Spring Creek. Poorly preserved but similar Visbyella? and Strophochonetes? From the Prídolí Wallace Shale at Cheesemans Creek are also illustrated. These occurrences provide significant new stratigraphic and distributional data for the species.
Silicified Early Devonian Trilobites From Brogans Creek, New South Wales, Gregory D. Edgecombe, Anthony J. Wright
Silicified Early Devonian Trilobites From Brogans Creek, New South Wales, Gregory D. Edgecombe, Anthony J. Wright
Faculty of Science, Medicine and Health - Papers: part A
Trilobites in an Emsian silicified fauna from the Carwell Creek Formation at Brogans Creek SE of Mudgee, NSW, include Acanthopyge (Jasperia) bifida, Dentaloscutellum hudsoni and Proetus nemus, all originally described from the Taemas area of NSW, together with Sthenarocalymene. Proetus nemus was known from limited material at Taemas, but is the most abundant species at Brogans Creek. Fuller description substantiates membership in Proetus (=Devonoproetus), rather than Ryckholtia, Longiproetus or Rhenocynproetus. Early ontogenetic stages of the trilobites are lacking at Brogans Creek, in contrast to Taemas. Conodonts co-occurring with the shelly fauna at Brogans Creek and at Taemas include Polygnathus nothoperbonus, …
Minimum Energy As The General Form Of Critical Flow And Maximum Flow Efficiency And For Explaining Variations In River Channel Pattern, He Qing Huang, Howard H. Chang, Gerald Nanson
Minimum Energy As The General Form Of Critical Flow And Maximum Flow Efficiency And For Explaining Variations In River Channel Pattern, He Qing Huang, Howard H. Chang, Gerald Nanson
Faculty of Science, Medicine and Health - Papers: part A
Although the Bélanger-Böss theorem of critical flow has been widely applied in open channel hydraulics, it was derived from the laws governing ideal frictionless flow. This study explores a more general expression of this theorem and examines its applicability to flow with friction and sediment transport. It demonstrates that the theorem can be more generally presented as the principle of minimum energy (PME), with maximum efficiency of energy use and minimum friction or minimum energy dissipation as its equivalents. Critical flow depth under frictionless conditions, the best hydraulic section where friction is introduced, and the most efficient alluvial channel geometry …
Litho- And Chronostratigraphy Of Holocene Sedimentary Successions Preserved In Lake Illawarra, Nsw, Australia, Craig R. Sloss, Brian G. Jones, Colin V. Murray-Wallace
Litho- And Chronostratigraphy Of Holocene Sedimentary Successions Preserved In Lake Illawarra, Nsw, Australia, Craig R. Sloss, Brian G. Jones, Colin V. Murray-Wallace
Faculty of Science, Medicine and Health - Papers: part A
Using a Holocene barrier estuary, Lake Illawarra, New South Wales, Australia, as an example, a detailed litho- and chrono-stratigraphy of the Holocene estuarine deposits has been investigated. Forty kilometres of seismic surveys, 61 vibracores, supplemented by auger drill holes and trenches, and faunal analysis were used in this study. A detailed chronology of the infilling of the barrier estuary has been established using 121 aspartic acid derived ages and 14 radiocarbon ages. The results provide a detailed chronology for the deposition of marine transgressive deposits between ca. 8 and 5 ka years ago. Barrier growth, initiated with rising sea levels …
Recent Sedimentation And Geomorphological Changes, Lake Illawarra, Nsw, Australia, Craig R. Sloss, Brian G. Jones, Colin V. Murray-Wallace, Bryan E. Chenhall
Recent Sedimentation And Geomorphological Changes, Lake Illawarra, Nsw, Australia, Craig R. Sloss, Brian G. Jones, Colin V. Murray-Wallace, Bryan E. Chenhall
Faculty of Science, Medicine and Health - Papers: part A
Assessing recent changes in landforms associated with Lake Illawarra was achieved by identifying changes in geomorphological features observed in early mapping of the region, aerial photographs and satellite imagery. Quantifying rates of sedimentation associated with prograding fluvial bay-head deltas and within the central basin of Lake Illawarra was established within the framework of amino acid racemisation, radiocarbon, and cesium 137 dating. Results indicate that sedimentation rates associated with fluvial bay-head deltas range from 31 mm/yr proximal to the delta front and fall to between 3 and 7 mm/yr in the pro-delta region. This is a significant increase in sedimentation rate …
Determining Rotational Temperatures From The Oh(8-3) Band, And A Comparison With (Oh96-2) Rotational Temperatures At Davis, Antarctica, Frances Phillips, G B. Burns, W J R French, P F B Williams, A R. Klekociuk, R P. Lowe
Determining Rotational Temperatures From The Oh(8-3) Band, And A Comparison With (Oh96-2) Rotational Temperatures At Davis, Antarctica, Frances Phillips, G B. Burns, W J R French, P F B Williams, A R. Klekociuk, R P. Lowe
Faculty of Science, Medicine and Health - Papers: part A
Rotational temperatures derived from the OH(8–3) band may vary by ~18K depending on the choice of transition probabilities. This is of concern when absolute temperatures or trends determined in combination with measurements of other hydroxyl bands are important. In this paper, measurements of the OH(8–3) temperature-insensitive Q/P and R/P line intensity ratios are used to select the most appropriate transition probabilities for use with this band. Aurora, airglow and solar and telluric absorption in the OH(8–3) band are also investigated. Water vapour absorption of P1(4), airglow or auroral contamination of P1(2) and solar absorption in the …
Anabranching And Maximum Flow Efficiency In Magela Creek, Northern Australia, John D. Jansen, Gerald C. Nanson
Anabranching And Maximum Flow Efficiency In Magela Creek, Northern Australia, John D. Jansen, Gerald C. Nanson
Faculty of Science, Medicine and Health - Papers: part A
[1] Anabranching is the prevailing river pattern found along alluvial tracts of the world's largest rivers. Hydraulic geometry and bed material discharge are compared between single channel and anabranching reaches up to 4 times bank-full discharge in Magela Creek, northern Australia. The anabranching channels exhibit greater sediment transporting capacity per unit available stream power, i.e., maximum flow efficiency (MFE). Simple flume experiments corroborate our field results showing the flow efficiency gains associated with anabranching, and highlight the prospect of a dominant anabranch, which is found in many anabranching rivers. These results demonstrate that anabranching can constitute a stable river pattern …