نتایج جستجو برای: glauconite
تعداد نتایج: 125 فیلتر نتایج به سال:
Organisms that colonize wood are subject to a taphonomic tragedy—the richer and more diverse they become, the greater deterioration of host less likely such communities be fossilized. Moreover, palaeobotanical studies fossil usually focus on plant tissue, neglecting evidence parasitic, saproxylic, other contained organisms. Such case involved relatively well-known assemblage from Santonian (Lat...
Knowledge of the mineralogical composition a petroleum reservoir's formation is crucial for petrophysical evaluation reservoir. The Mishrif formation, which prevalent in Middle East, renowned its complexity. Multi-mineral inversion, combines multiple logs and inversions minerals at once, can make it easier to figure out what are Formation. This method could help identify better give more inform...
Epilithic microbial communities, ubiquitously found in biofilms on submerged granite, limestone, and sandstone, as well as on the concrete support pillars of bridges, were examined in the Speed River, Ontario, Canada. Transmission electron microscopy showed that attached bacteria (on all substrata) were highly mineralized, ranging from Fe-rich capsular material to fine-grained (<1 mum) authigen...
Groundwater and sediment samples were collected along a flow path in the Aquia aquifer (Paleocene), Maryland in order to examine and study the factors influencing "evolution" of arsenic (As) in these groundwaters. The Aquia crops out near Washington, DC, where it is unconfined, and extends approximately 90 km down dip to the south and east towards and beneath the Chesapeake Bay. The studied flo...
A systematic analysis of the mineral resource base (MRB) strategically important minerals for Ukrainian economy is carried out. Four categories strategic from point view their investment attractiveness are identified: traditional (iron, manganese, titanium, uranium, kaolin, sand molding, building stones, quartz raw materials, refractory clay); highly promising (rare earths, zirconium and hafniu...
Green clay layers are reported from the Pliocene–Holocene intervals in five of the six sites drilled in the South China Sea (SCS) during Leg 184. Centimeter-scale discrete, discontinuous, and bioturbated layers, constituted by stiff and porous green clays, were observed, sometimes associated with iron sulfides and pyrite. Detailed mineralogical and geochemical analyses indicate that they differ...
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