Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 2 of 2
Full-Text Articles in Medicine and Health Sciences
Geochronology Of Coal Measures In The Sydney Basing From U-Pb Shrimp Dating Of Airfall Tuffs, Paul F. Carr, M Fanning, Brian G. Jones, Adrian C. Hutton
Geochronology Of Coal Measures In The Sydney Basing From U-Pb Shrimp Dating Of Airfall Tuffs, Paul F. Carr, M Fanning, Brian G. Jones, Adrian C. Hutton
Faculty of Science, Medicine and Health - Papers: part A
Zircon-bearing rhyolitic and dacitic airfall tuffs in the Late Permian Sydney Basin coal measures provide ideal chronostratigraphic markers due to their widespread occurrence and rapid emplacement. SHRIMP U-Pb zircon dates for several stratigraphically-controlled airfall tuffs are consistent with their relative ages and biostratigraphic data, and indicate that the Illawarra Coal Measures accumulated in less than ~ 12 million years. Isotopic ages of the A waba Tuff and the Burragorang Claystone Member are indistinguishable within analytical uncertainty and support the correlation of these units proposed previously on the basis of geochemical fingerprinti~g. Deposition of coal-bearing sequences in the southern Sydney Basin …
Resource Significance Of Overwash Sand Deposits From The Southern Sydney Basin, Adam D. Switzer, Kevin Pucillo, Brian G. Jones, Edward A. Bryant
Resource Significance Of Overwash Sand Deposits From The Southern Sydney Basin, Adam D. Switzer, Kevin Pucillo, Brian G. Jones, Edward A. Bryant
Faculty of Science, Medicine and Health - Papers: part A
Sand extraction from coastal sand dunes results in significant loss of sand from the natural system, destruction of dune vegetation and dramatic geo-technical modification. This can place significant limitations on land use. The identification of, and extraction from sand bodies that are not part of active coastal barriers or dune structures is therefore considered to be a more environmentally sound practice . Sedimentological investigation of several back-barrier estuarine sequences have located several marine sand deposits within the Illawarra region that meet the above criteria. The action of overwash, possibly by tsunami waves in the late Holocene has deposited large volumes …