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Because croton tiglium oil is cocarcinogenic, it has been used in tumor research. [5] Berenblum and Shubik saw croton oil as a “promoting” agent: [6] a kind of carcinogen that acted through an inflammatory response. Mice painted only with croton oil hadn’t developed tumors. Croton oil is the source of the chemical compound phorbol. [7]
Within the West African Craton, there is a large amount of mining activity covering resources such as gold, copper, cobalt, silver, tin, and zinc. [ 24 ] Artisanal mining activity in the craton dates back to the early 1960s which used quartz vein debris as a gold indicator. [ 25 ]
East European Craton, the core of Baltica. Volgo-Uralian Craton, Russia (3.0–2.7 Ga) Baltic Shield, part of the East European Craton; Fennoscandian Shield, the exposed Northwestern part of the Baltic Shield in Norway, Sweden and Finland (3.1 Ga) Karelian Craton, part of the Fennoscandian Shield in Southeast Finland and Karelia Russia, (3.4 Ga)
Approximate extent of Taoudeni basin Major West African sedimentary basins. The Taoudeni Basin is a major Sedimentary basin in West Africa, named after the Taoudenni village in northern Mali. It covers large parts of the West African craton in Mauritania and Mali. It is of considerable interest due to its possible reserves of oil. [1]
Cratons of South America and Africa during the Triassic Period when the two continents were joined as part of the Pangea supercontinent. A craton (/ ˈ k r eɪ t ɒ n / KRAYT-on, / ˈ k r æ t ɒ n / KRAT-on, or / ˈ k r eɪ t ən / KRAY-tən; [1] [2] [3] from Ancient Greek: κράτος kratos "strength") is an old and stable part of the continental lithosphere, which consists of Earth's two ...
Ghana and Mali are the second and third largest producers of gold in Africa, respectively. [ 1 ] The Birimian terranes in the southern part of the West African craton are a mix of metamorphosed volcanic , sedimentary , and plutonic rocks and low-grade metavolcanics and metasediments.
Paleoproterozoic rock units belonging to Birimian Supergroup, common across West Africa, dominate northwest and southwest Ghana. The Birimian Supergroup has two units, one a succession of sedimentary rocks including phyllite, tuff and greywacke overlain by conglomerate, sandstone and shale and the other a volcanic tholeiitic magma series.
Map of the Zimbabwe and Kaapvaal Cratons SW end of the 550 km long Great Dyke of Zimbabwe from ISS, 2010. Brachiosaurus femur and Geologist Metrinah Ruzvidzo, 2005. The geology of Zimbabwe in southern Africa is centered on the Zimbabwe Craton, a core of Archean basement composed in the main of granitoids, schist and gneisses.
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