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Browsing Geology by UP Author "Bumby, Adam John"
Now showing items 1-20 of 22
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Bordy, Emese M.; Bumby, Adam John; Catuneanu, Octavian; Eriksson, Patrick George (Society for Sedimentary Geology, 2004)Sandstone pillars in the Lower Jurassic eolian strata of the Clarens Formation are concentrated in clusters, with up to four pillars within 25 m2 in two localities in the Tuli Basin of northern South Africa and southern ...
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Simpson, Edward L.; Heness, Elizabeth; Bumby, Adam John; Eriksson, Patrick George; Eriksson, Kenneth A.; Hilbert-Wolf, Hannah L.; Linnevelt, Sarah; Malenda, H. Fitzgerald; Modungwa, Tshepiso; Okafor, O.J. (Elsevier, 2013-10)Early evolved microbial communities characterized the initial biological invasion of Precambrian conti-nental landscapes. In modern arid settings, microbial mats and biological soil crusts are well-developedand stabilize ...
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Heness, Elizabeth; Simpson, Edward L.; Bumby, Adam John; Eriksson, Patrick George; Eriksson, Kenneth A.; Hilbert-Wolf, Hannah L.; Okafor, O.J.; Linnevelt, Sarah; Malenda, H. Fitzgerald; Modungwa, Tshepiso (Elsevier, 2014-08)Eolian ergs, and associated environs are sensitive to short- and long-term climate changes. In one of the oldest, erg deposits, the ~2.0 Ga Makgabeng Formation, facies association changes reflect one of the earliest ...
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Eriksson, Patrick George; Catuneanu, Octavian; Bumby, Adam John (Elsevier, 2012-05)This work provides a pilot study of global sequence stratigraphic correlation for the Precambrian for five chosen cratons. Detailed chronostratigraphic charts summarize the supracrustal geological evolution of each craton, ...
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Ibinoof, M.A.; Bumby, Adam John; Grantham, G.H.; Abdelrahman, E.M.; Eriksson, Patrick George; Le Roux, P.J. (Elsevier, 2016-08)Neoproterozoic, Pan-African low-grade metavolcanic rocks and associated mafic and ultramafic rocks of ophiolitic origin have long been identified within the pre-Neoproterozoic Saharan Metacraton (SMC). These low-grade ...
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Eriksson, Patrick George; Van der Merwe, R.; Bumby, Adam John (Geological Society of South Africa, 1999)In his paper on the geometrical relations between the Transvaal Supergroup and the Bushveld Complex, Cawthorn ( 1998) argues that there is ·no need to infer a considerable period of pre-Rooiberg Group erosion prior to ...
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Choudhuri, Adrita; Mandal, Sabyasachi; Bumby, Adam John; Pillai, S. Suresh Kumar (Cambridge University Press, 2023-06)Among the vast swathes of Gondwanan sedimentary rocks in India, exposures of the Lower Permian Talchir Formation at Manendragarh in India are exceptional for their cold marine faunal assemblage and muddy conglomerates of ...
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Zoraghi, Gholamheidar; Goraji, Kazem Shabani; Noura, Mohammadreza; Rashki, Alireza; Bumby, Adam John (Islamic Azad University, Mashhad Branch, 2019)Sedimentation in the dune fields of the Sistan Plain of Iran is the result of deposition of fine-grained sediment downstream of the Helmand River. Due to poor adhesion and low moisture content of soil particles, and the ...
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Eriksson, Patrick George; Lenhardt, Nils; Wright, D.T.; Mazumder, Rajat; Bumby, Adam John (Elsevier, 2011)The application of the onset of supercontinentality, the “Great Oxidation Event” (GOE) and the first global scale glaciation in the Neoarchaean-Palaeoproterozoic as panacea-like events providing a framework or even ...
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Bumby, Adam John; Eriksson, Patrick George; Catuneanu, Octavian; Nelson, David R., 1951-; Rigby, Martin J. (Elsevier, 2012-05)The Kaapvaal Craton hosts a number of Precambrian sedimentary successions which were deposited between 3105 Ma (Dominion Group) and 1700 Ma (Waterberg Group) Although younger Precambrian sedimentary sequences outcrop ...
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Chakraborty, Nivedita; Sarkar, Subir; Mandal, Anudeb; Bumby, Adam John (Elsevier, 2018-03)Within the hydrocarbon-producing Cretaceous marine Uttatur Group, Cauvery Basin, India, the Garudamangalam Sandstone Formation is at top of a TST-HST transit. The δ13C value is expectedly depleted within the calcareous ...
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Lenhardt, Nils; Eriksson, Patrick George; Catuneanu, Octavian; Bumby, Adam John (Elsevier, 2012-09)The time of deposition of the Pretoria Group between 2.32 and 2.06 Ga on South Africa’s Kaapvaal Craton was characterized by the first major increase in atmospheric oxygen. It was accompanied by the extrusion of significant ...
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Banerjee, Santanu; Chattoraj, Shovan Lal; Saraswati, P.K.; Dasgupta, Somnath; Sarkar, Urbashi; Bumby, Adam John (Wiley-Blackwell, 2012-08)An integrated study of the sedimentology, micropalaeontology, mineralogy and geochemistry of glauconites in the Oligocene Maniyara Fort Formation (western Kutch, India), has been undertaken. Authigenic glauconites, mostly ...
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Corcoran, Patricia L.; Bumby, Adam John; Davis, D.W. (Elsevier, 2013)Four Paleoproterozoic formations of the Waterberg Group in South Africa are composed of coarse clastic detritus derived from erosion of the Limpopo Belt. Timing of the Limpopo orogeny, an event involving the collision ...
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Bordy, Emese M.; Bumby, Adam John; Catuneanu, Octavian; Eriksson, Patrick George (Academy of Science of South Africa, 2009-09)Complex structures in the sandstones of the Lower Jurassic aeolian Clarens Formation (Karoo Supergroup) are found at numerous localities throughout southern Africa, and can be assigned to five distinct architectural groups: ...
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Samanta, Pradip; Mukhopadhyay, Soumik; Sen, Arunava; Ghosh, Nipun; Bumby, Adam John (Elsevier, 2022-02)An integrated approach of facies analysis, architectural element analysis and geochemistry provides significant insight into the palaeogeography, palaeoclimate and provenances of alluvial sediments in the Neoproterozoic ...
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Eriksson, Patrick George; Banerjee, Santanu; Catuneanu, Octavian; Sarkar, Subir; Bumby, Adam John; Mtimkulu, M.N. (Elsevier, 2007-11)Although the principle of uniformitarianism may be applied to the Precambrian sedimentary record as a whole, certain periods of the Archaean and Palaeoproterozoic witnessed a changing pattern of prime influences controlling ...
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Westgate, Michael; Manzi, Musa S.D.; Malehmir, Alireza; Gibson, Roger L.; Andreoli, Marco A.G.; Bumby, Adam John (Elsevier, 2021-08)The 150 km long, 6 s TWT, 2D seismic profile KBF03A, which was acquired in 1994 and lies near the western edge of the Kaapvaal craton in South Africa, has been reprocessed using standard reflection seismic processing ...
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Omietimi, Erepamo J.; Lenhardt, Nils; Yang, Renchao; Goetz, Annette E.; Bumby, Adam John (Elsevier, 2022-08)The Campano-Maastrichtian deposits of the Nkporo and Mamu formations of the Anambra Basin represent prospective hydrocarbon resources in southern Nigeria. In order to reveal the paleoclimate, sediment recycling and ...
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Koleini, Mehran; Van Rooy, J.L. (Jan Louis); Bumby, Adam John (Springer, 2012-09)The Zagros Mountains Range is an important structural unit in south western Iran and accommodates a significant portion of the 2.5 cm/year convergence between Arabia and Eurasia. This structural unit includes folds, thrusts, ...
Now showing items 1-20 of 22