... and encompasses the boundary of Triassic and Jurassic in Southern Africa. The Formation is considered a stratigraphic equivalent of the Upper Omingonde Formation, Etjo Basin, Namibia, with the Bodibeng Sandstone Formation, Tuli Basin, Botswana, with the upper Mosolotsane Formation, Kalahari Karoo Basin. All Upper...

...Nigel Mountney; John Howell; Stephen Flint; Dougal Jerram Abstract The Cretaceous Etjo Formation is a 200-m-thick eolian and fluvial sandstone succession exposed in the Huab Basin of northwestern Namibia. Eolian sedimentation was terminated abruptly by the emplacement of flood basalts...

... been named Otjiwarongo and Erongo on the southern side, and Otjungundu and Goboboseb on the northern edge ( South African Committee for Stratigraphy, 1980 ). The outcrops documented here all lie within the Otjiwarongo Basin ( Figs.1 and 2 ) in the area around Mount Etjo where the Omingonde strata reach...

..., extrabasinal sediment supply and/or rates of tectonic subsidence. Geological setting The Jurassic Cretaceous aeolian fluvial Etjo Sandstone Formation is exposed over more than 3000 km2 in the Huab Basin of northwestern Namibia (Fig. 1). The basin forms an eastern extension to the much larger Parana´ Basin...

... grain fall deposits between individual grain flow laminae. The outcrop analogue chosen for this study is the lower Cretaceous Etjo Formation exposed in the Huab Basin of northwestern Namibia ( Fig. 2 ). The Etjo Formation is a predominantly aeolian succession, up to 200 m thick...

... of correlation of the aeolian Etjo sandstones with those of the Clarens Formation of the Karoo basin in South Africa. The recent intersection of basalt flows interbedded with Etjo sandstones in a borehole core drilled at Rooiwal in the Waterberg region of northeast Namibia (Figure 1 ) has provided...

..., Landsat 7 ETM+ imagery and maps published by the Geological Survey of Namibia. The term Huab Basin describes the basinal feature centered on the Huab River, containing sedimentary rocks of the Paleozoic–Mesozoic Karoo Supergroup and Mesozoic Etendeka Group (e.g., Horsthemke et al. 1990...

... in this region. This picture of aeolian sediment interbeds, dwindling in size and abundance, and restricted towards the base of the volcanic pile is also supported by observations in outcrop and borehole data from the Paraná basin ( Rocha‐Campos et al. 1988). This palaeoenvironmental record...

...Anna C. Strömbäck; John A. Howell Abstract Aeolian sandstones of the Permian Rotliegend Group comprise the principal gas reservoirs of the Southern North Sea Basin. The upper portion of the reservoir interval comprises a unit informally called the ‘Weissliegend’. This unit comprises mass-flow...

... Publications of the Geological Society of South Africa 1984 13 195 245 Ernesto, M. & Pacca, I.G. 1988. Palaeomagnetism of the Paraná Basin flood volcanics, southern Brazil In: Piccirillo, E.M. & Melfi, A.J. (eds) The Mesozoic flood volcanism of the Paraná Basin. Univ Sao Paulo, 229–255...

..., 2002 ), others successions climb at lower angles (e.g., the transition zone between the undifferentiated Cutler Group and the Cedar Mesa Sandstone at Indian Creek, southeast Utah–0.35°, Mountney and Jagger, 2004 ) or steeper angles (e.g., parts of the Etjo Sandstone, Namibia–as much as 4°, Mountney...

...E.M. Bordy; H.V. Head Abstract The Lower Jurassic Clarens Formation is a sandstone-dominated unit that extends from its type area in the main Karoo Basin into a large part of southern Africa with a gross lithological uniformity that is one of its key diagnostic features. The impressive cream...

...Grace Isabel Emma Cosgrove; Luca Colombera; Nigel P. Mountney Abstract Despite a well-documented record of preserved aeolian successions from sedimentary basins characterized by widely variable subsidence rates, the relationship between aeolian architecture and subsidence-driven accommodation...

... the Mesozoic Etjo Sandstone Formation, northwest Namibia . Jour. African Earth Sci ., v. 27 , pp. 175 – 192 . doi: https://doi.org/10.1016/S0899-5362(98)00056-6 Mukhopadhyay , S.K. , Shome , S.K. (1996) Depositional environment and basin development during early palaeogene lignite deposition...

... inspection of the internal facies architecture of flood basalts onshore provides a framework to interpret the offshore sequences imaged by remote techniques such as reflection seismology. A geological interpretation of the offshore lava sequences in the Faroe–Shetland Basin, using constraints from onshore...

... of South Africa, and the Etjo Sandstone of Namibia. The Botucatu in the Paraná basin comprises the dominant unit of the Guaraní aquifer, which forms one of the world's largest freshwater reservoirs ( Gilboa et al., 1976 ; Rebouças, 1994 ; Araújo et al., 1995 ; 1999 ; CTGRM, 2001 ; Vives et al...

... and can show evidence of sand baking and basalt loading into soft sand. Continued flood basalt volcanism leads to effusive, subaerial vulcanism where lava infills and ponds in topographic lows and basins. During exposure the upper surface of flows often undergoes erosion. Gas escape during cooling...

... winds, determining the source areas and paleotransport direction of the sand can improve predictions of the distribution of the dune facies around the GOM. Paleo–wind-blown sediment transport into the proto-GOM was controlled by wind direction and magnitude and the extant topography of the basin...

... compaction. Two examples from a previous study of compactional fracturing are used: the Oligocene Frio Formation, Gulf of Mexico Basin, and the Cambrian Mount Simon Formation, Illinois Basin, United States. Grain fracturing during compaction creates intragranular fracture surfaces that are favorable sites...