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What has the author M Kamal Akaad written?
M. Kamal Akaad has written: 'On the behaviour of serpentinites and its implications' -- subject(s): Serpentinite
What has the author Daniel L Wilson written?
Daniel L. Wilson has written: 'The origin of serpentinites associated with the Shuksan metamorphic suite near Gee Point, Washington' -- subject(s): Crystalline Rocks, Geology, Rocks, Crystalline, Rocks, Ultrabasic, Serpentinite, Ultrabasic Rocks
How is citrine formed?
== == Citrine crystals can form together with amethyst to form ametrine and bi-colored quartz. found this on the following site: http://www.rosiejiggs.co.uk/gemstones.htm Citrine, a form of quartz crystal, may have derived its brownish-orange tint from irradiation. Amethyst quartz crystals can also be turned to a citrine color by heating them.
Balikpapan coal formation and other coal formation caparision?
East Kalimantan GeologyNumerous Tertiary, hydrocarbon bearing basins occur around the periphery of Borneo (Hutchison, 1989). A large portion of East Kalimantan is covered by the Kutei Basin. The Kutei Basin is the largest (160000 square kilometres) and deepest (12000 to 14000 metres) Tertiary basin in Indonesia.Formations of the Kutei Basin are essentially a succession of eastward prograding deltas. The stratigraphic succession around the tenement area is summarised in below Tables. Formations developed within the tenement area are highlighted in yellow.Stratigraphy of the Samarinda QuadrangleAgeFormationLithologyThicknessUpper Middle MioceneBalikpapan Formation (Tmbp)Alternating quartz sandstone, silty claystone and shale with intercalations of marl, limestone and coal. Deposited in a littoral to shallow marine environment. Conformably overlies the Paulua Balang Formation.800 mMiddle MiocenePaulau Balang Formation (Tmpb)Alternating quartz sandstone, sandstone and claystone with intercalations of coal seams. Deposited in a shallow sublittoral environment. Conformably overlies the Bebuluh Formation.900 mEarly MioceneBebulu Formation (Tmbl)Limestone with intercalations of claystone and marl. Shallow marine environment.Late Oligocene to Middle MiocenePamaluan Formation (Tomp)Claystone and shale intercalated with marl, sandstone and limestone. Deposited in deep sea environment.1500 - 2500 mEarly EoceneKuaro Formation (Tek)Sandstone and conglomerate. Intercalations of coal, shale, marl and limestone. Shallow marine environment.700 mLate CretaceousHaruyan Group (Kvh)Lava, breccia and tuff. Lava basaltic.Early CretaceousPintap Formation (Ksp)Flysch deposits. Alternating sandstone, claystone, siltstone, shale, limestone and basaltic lavas. Deposited in arc trench gap area.
