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11by Hay, William W., Brock, J. C.“... in the southeastern Angola Basin record long-term waxing and waning of upwelling. The amounts of opaline silica...”
Published in Geological Society, London, Special Publications (1992)
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12“... in silica content) magmatic systems, but may also occur in mafic (poor in silica content) systems. Felsic...”
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13“.... The weathering products are clays, in some cases kaolinite, pure quartz and other silica types sands, elimination...”
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14by Pudsey, Carol J.“...) and the proportion of biogenic silica for the upper 300 m at Site 1095, the upper 250 m at Site 1096, and the whole...”
Published 2002
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15“...Numerous species of sponges (Porifera) habituate cold waters, including Antarctic seas. Silica...”
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16“... echinoids and bivalves; and (c) a distal zone where marls and calcarenites contain silica-sponge spicules...”
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17by Lindgård, Jan, Grelk, B., Wigum, Børge J., Trägårdh, J., Appelqvist, Karin, Holt, Erika, Ferreira, Miguel, Leivo, Markku“... and reactive silica of the aggregate. Signs of premature deterioration in concrete structures that could...”
Published 2017
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18“... grown in 0.11 m diameter pots made from 1.5m lengths of drainage pipes, filled with washed silica sand...”
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19“...: 100 % Portland cement (PC), B: 96 % PC and 4 % silica fume (SF), D: 93 % OPC and 7 % SF, and E: 77...”
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20by Awais, Muhammad, Agonafir, Mesfin Belayneh, Saasen, Arild, Bandyopadhyay, Sulalit“... fluids were used as the base fluids. NPs such as Iron oxide, Silica (SiO2), and multi-walled carbon...”
Published in Volume 10: Petroleum Technology (2021)
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