| 词条 | Minchinbury Sandstone |
| 释义 |
FormationFormed in the middle triassic period, this sandstone was structured by marine deposition as a set of sandy barrier islands at a coastal shoreline.[2] LocationThe type locality of the formation is near the Great Western Highway in the suburb of Minchinbury in western Sydney. It is most often seen in the western parts of the city. Outcroppings are weak and not easily found, but it may be seen in places like road cuttings in localities from Epping, Grose Vale-Kurrajong, Kellyville, Rogans Hill, Bankstown, Pendle Hill, Bonnyrigg, Menangle, Duck River, Brownlow Hill and other sites.[3][3] DescriptionThickness is between 1.5 and 6 metres, usually less than 3 metres. It comprises up to 70% quartz with calcite and volcanic lithic fragments. There is less feldspar and more calcite than the adjacent Bringelly Shale. Related to Greywacke, it comprises fine to medium-grained lithic sandstone. The Bringelly Shale lies above the Minchinbury Sandstone.[4] Fossils are rare in this stratum, though plant fragments have been recorded.[5] See alsoSydney Basin, Hawkesbury sandstone, Bringelly Shale, Ashfield Shale, Wianamatta shale, Mittagong formation and Narrabeen Group. References1. ^{{cite book |author1=Chris Herbert |author2=Robin Helby |lastauthoramp=yes |title=A Guide to the Sydney basin|year=1980 |edition= 1st |publisher=Geological Survey of NSW|pages=582 |location=Maitland, NSW |isbn=0-7240-1250-8}} {{Geology-stub}}2. ^{{cite web|last=John Byrnes & Viera Scheibner|title=The inorganic nature of marine microfossils described from the Wianamatta Group|url=http://micropal.geoscienceworld.org/content/26/3/323.extract|work=Geological Survey of New South Wales|accessdate=October 24, 2012}} 3. ^{{cite web|last=Lovering, J. F., 1954|title=Bringelly Shale|url=http://australianmuseum.net.au/Uploads/Journals/17385/631_complete.pdf|work=STRATIGRAPHY OF' THE WIANAMATTA GROUP|publisher=Australian Museum|accessdate=August 23, 2012}} 4. ^{{cite web|title=Geology Of The Triassic Rocks Of The Sydney Area|url=http://www.pellsconsulting.com.au/downloads/engineeringGeologyOfTheTriassicRocksOfTheSydneyArea.pdf|publisher=pellsconsulting.com.au|accessdate=October 24, 2012}} 5. ^1 {{cite web|title=Minchinbury Sandstone|url=http://dbforms.ga.gov.au/pls/www/geodx.strat_units.sch_full?wher=stratno=27678|work=Stratigraphic Search Geoscience Australia|publisher=Australian Government|accessdate=October 24, 2012}} 1 : Geology of New South Wales |
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