Basins Perth
the Basins Perth is forms a significant freshwater aquifer. It is composed primarily of non-marine fluviatile feldspathic, poorly sorted
sandstones which are porous and poorly cemented, hence allowing for considerable groundwater reserves. The Yarragadee Formation
grades from a shale-siltstone dominated base to a cleaner sandstone in the upper portions of the formation, probably representing
increased subsidence or filling of the basin during the late Jurassic.
Cadda Formation conformably underlies the Yarragadee Formation and is composed primarily of shale and siltstone, with occasional beds
of very coarse sandstone. The upper portions of the unit are composed of a marl grading into a marine limestone, representing stable
tectonics at this time.
Cattamarra Coal Measures are a sequence of non-marine, probably fluviatile sandstones, shales and silts including bituminous coal, and
are up to 300 m thick. The Cattamarra Coal Measures conformably overly the Eneabba Formation.
Eneabba Formation is a lower-Jurassic terrigenous red-bed unit composed of interbedded sandstone with variably coloured limestone.
The Eneabba Formation is conformable with the Lesueur Sandstone in the south of the Basins Perth and unconformable with the Kockatea
Formation
sandstones which are porous and poorly cemented, hence allowing for considerable groundwater reserves. The Yarragadee Formation
grades from a shale-siltstone dominated base to a cleaner sandstone in the upper portions of the formation, probably representing
increased subsidence or filling of the basin during the late Jurassic.
Cadda Formation conformably underlies the Yarragadee Formation and is composed primarily of shale and siltstone, with occasional beds
of very coarse sandstone. The upper portions of the unit are composed of a marl grading into a marine limestone, representing stable
tectonics at this time.
Cattamarra Coal Measures are a sequence of non-marine, probably fluviatile sandstones, shales and silts including bituminous coal, and
are up to 300 m thick. The Cattamarra Coal Measures conformably overly the Eneabba Formation.
Eneabba Formation is a lower-Jurassic terrigenous red-bed unit composed of interbedded sandstone with variably coloured limestone.
The Eneabba Formation is conformable with the Lesueur Sandstone in the south of the Basins Perth and unconformable with the Kockatea
Formation
মন্তব্যসমূহ
একটি মন্তব্য পোস্ট করুন