A5028906866- Geological formations and processes
- Geological and Geophysical Studies
- Evolution and Paleontology Studies
- Paleontology and Evolutionary Biology
- Paleontology and Stratigraphy of Fossils
- Geological Studies and Exploration
- Pleistocene-Era Hominins and Archaeology
- Geological and Geochemical Analysis
- Geology and Paleoclimatology Research
- Hydrocarbon exploration and reservoir analysis
- Forensic Anthropology and Bioarchaeology Studies
- NMR spectroscopy and applications
- Geochemistry and Geologic Mapping
- Image Processing and 3D Reconstruction
- Archaeology and Rock Art Studies
- Paleopathology and ancient diseases
- Ichthyology and Marine Biology
- Geophysical and Geoelectrical Methods
- Seismic Imaging and Inversion Techniques
- Ancient Egypt and Archaeology
- Hydrology and Sediment Transport Processes
- Air Quality and Health Impacts
- Amphibian and Reptile Biology
- Archaeology and ancient environmental studies
- Archaeology and Historical Studies
University of the Witwatersrand
2011-2025
Newly exposed cave sediments at the Malapa site include a flowstone layer capping sedimentary unit containing Australopithecus sediba fossils. Uranium-lead dating of flowstone, combined with paleomagnetic and stratigraphic analysis underlying sediments, provides tightly constrained date 1.977 ± 0.002 million years ago (Ma) for these This refined suggests that Au. from predates earliest uncontested evidence Homo in Africa.
In this study we describe new results of excavations in the Dinaledi Subsystem Rising Star cave system, South Africa. two areas within Hill Antechamber and Chamber work uncovered concentrations abundant Homo naledi fossils including articulated, matrix-supported skeletal regions consistent with rapid covering by sediment prior to decomposition soft tissue. We additionally re-examine spatial positioning material associated sediments Puzzle Box area, from which H. remains representing a...
Abstract The KNM-ER 2598 occipital is among the oldest fossils attributed to Homo erectus but questions have been raised about whether it may derive from a younger horizon. Here we report on efforts relocate locality and investigate its paleontological geological context. Although located in different East Turkana collection area (Area 13) than initially reported, stratigraphically positioned below KBS Tuff outcrops show no evidence of deflation unit, supporting an age >1.855 Ma. Newly...
Recent excavations in the Rising Star Cave System of South Africa have revealed burials extinct hominin species Homo naledi . A combination geological and anatomical evidence shows that hominins dug holes disrupted subsurface stratigraphy interred remains H. individuals, resulting at least two discrete features within Dinaledi Chamber Hill Antechamber. These are most ancient interments yet recorded record, earlier than sapiens by 100,000 years. along with other suggest diverse mortuary...
Recent excavations in the Rising Star Cave System of South Africa have revealed burials extinct hominin species Homo naledi . A combination geological and anatomical evidence shows that hominins dug holes disrupted subsurface stratigraphy interred remains H. individuals, resulting at least two discrete features within Dinaledi Chamber Hill Antechamber. These are most ancient interments yet recorded record, earlier than sapiens by 100,000 years. along with other suggest diverse mortuary...
The Wahweap Formation is an ~ 400-m-thick succession of fluvial and estuarine channel sandstones floodbasin mudstones divided into lower, middle, upper, capping sandstone members. Facies analysis the on Kaiparowits Plateau reveals presence ten facies associations grouped deposits. (FAs) from channels include: (1) single-story (2) multistory lenticular bodies, (3) major tabular (4) gravel bedforms, (5) low-angle heterolithic cross-strata, (10) mudrock, whereas (6) minor (7) interlaminated (8)...
The Upper Cretaceous (middle-late Campanian) Wahweap Formation of southern Utah contains the oldest diagnostic evidence ceratopsids (to date, all centrosaurines) in North America, with a number specimens recovered from throughout unit that spans between 81 and 77 Ma. Only single specimen has been formally named, Diabloceratops eatoni, lower middle member formation. Machairoceratops cronusi gen. et sp. nov., new centrosaurine ceratopsid upper Formation, is here described based on cranial...
Research Article| September 18, 2018 High-Paleolatitude Environmental Change During the Early To Middle Devonian: Insights from Emsian–Eifelian (Lower–Middle Devonian) Siliciclastic Depositional Systems of Ceres Subgroup (Bokkeveld Group) South Africa Cameron R. Penn-Clarke; Penn-Clarke 1Evolutionary Studies Institute, University Witwatersrand, Johannesburg, 2School Geosciences, Search for other works by this author on: GSW Google Scholar Bruce S. Rubidge; Rubidge Zubair A. Jinnah Author and...
Abstract In this study we describe new results of excavations in the Dinaledi Subsystem Rising Star cave system, South Africa. two areas within Hill Antechamber and Chamber work uncovered concentrations abundant Homo naledi fossils including articulated, matrix-supported skeletal regions consistent with rapid covering by sediment prior to decomposition soft tissue. We additionally re-examine spatial positioning material associated sediments Puzzle Box area, from which H. remains representing...
Abstract. Deep-water fold-and-thrust belt (DWFTB) systems are gravity-driven collapse structures often found in passive margin settings and comprised of a linked up-dip extensional domain, central transitional/translational down-dip compressional domain. Many Late Cretaceous DWFTB occur along the SW African with multiple, over-pressurized, seaward-dipping shale detachment surfaces accommodating gravitational slip. In this study we use 3D reflection seismic data to constrain strato-structural...
Objectives: To quantify personal time-weighted average respirable dust and quartz exposure on a sandy, sandy loam, clay soil farm in the Free State North West provinces of South Africa to ascertain whether type is determinant quartz. Methods: Three farms, located Africa, had their confirmed as clay; and, from these, total 298 measurements were collected between July 2006–November 2009 during periods major farming operations. Values below limit detection (LOD) (22 μg · m−3) estimated using...
Abstract A second K/Pg boundary interval in the northern sector of Antarctic Peninsula on Vega Island has been proposed, yet current temporal resolution these strata prohibits direct testing this hypothesis. To not only test for existence a but also provide increased age associated vertebrate fauna (e.g., marine reptiles, non-avian dinosaurs, and avian dinosaurs), succession was intensively re-sampled. Stratigraphic investigation Cape Lamb Member Snow Hill Formation, particular, overlying...
ABSTRACT The sedimentology of the Eifelian–Givetian (Middle Devonian) Bidouw Subgroup in Clanwilliam Sub-basin South Africa has been reassessed. Four distinct lithofacies associations are recognized (A–D) and representative deposits offshore (Os), transition zone to distal lower shoreface (OTZ-dLSF), proximal (pLSF), upper shoreface–beach (USF-Beach) paleoenvironments. These paleoenvironments arranged as several T-R-controlled storm- wave-dominated shallow-marine depositional systems....
Abstract Within the eastern portion of Carletonville gold field, gold- and uranium-rich Carbon Leader reef Central Rand Group (Witwatersrand Supergroup) is truncated by an erosion channel. This channel asymmetrical lenticular in shape, measuring 150 to 180 m width up 100 depth. High-resolution seismic data show that cuts from into all older units down Roodepoort Formation underlying West Group. A total seven boreholes were drilled channel, revealing it composed quartzite at its base (9...
Abstract Many features indicative of natural gas and oil leakage are delineated in the deep-water Orange Basin offshore South Africa using 3D reflection seismic data. These influenced by translational compressional domains an underlying Upper Cretaceous fold-and-thrust belt (DWFTB) system detaching Turonian shales. The origin hydrocarbons is postulated to be from both: (a) thermogenic sources stemming speculative proven Aptian source rocks at depth; (b) biogenic organic-rich sediments...
Abstract. We use high-resolution 3D reflection seismic data to constrain the strato-structural evolution of transitional and compressional domains a Late Cretaceous deep-water fold-and-thrust belt (DWFTB) system its influence on overlying Cenozoic megasequence in Orange Basin, South Africa. Multiple shale detachment surfaces have given rise complex structural framework, allowing for redistribution stress strain, along progressive deformation sedimentation. High-resolution show that domain...