Minchinbury Sandstone
Minchinbury Sandstone is a component of the
Formation
Formed in the middle Triassic period, this sandstone was structured by marine deposition as a set of sandy barrier islands at a coastal shoreline.[2]
Location
The type locality of the formation is near the
Rogans Hill, Bankstown, Pendle Hill, Bonnyrigg, Menangle, Duck River, Brownlow Hill and other sites.[3][4]
Description
Thickness 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.[5] Fossils are rare in this stratum, though plant fragments have been recorded.[3]
See also
Narrabeen Group
.
References
- ISBN 0-7240-1250-8.
- ^ John Byrnes & Viera Scheibner. "The inorganic nature of marine microfossils described from the Wianamatta Group". Geological Survey of New South Wales. Retrieved October 24, 2012.
- ^ a b "Minchinbury Sandstone". Stratigraphic Search Geoscience Australia. Australian Government. Retrieved October 24, 2012.
- ^ Lovering, J. F., 1954. "Bringelly Shale" (PDF). STRATIGRAPHY OF' THE WIANAMATTA GROUP. Australian Museum. Retrieved August 23, 2012.
{{cite web}}: CS1 maint: multiple names: authors list (link) CS1 maint: numeric names: authors list (link) - ^ "Geology Of The Triassic Rocks Of The Sydney Area" (PDF). pellsconsulting.com.au. Retrieved October 24, 2012.
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