1 edition of The stratigraphy of the Witwatersrand Sequence in the Delmas area, Transvaal found in the catalog.
The stratigraphy of the Witwatersrand Sequence in the Delmas area, Transvaal
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Abstract. Iron formations (IFs) are Fe-rich chemical sedimentary rocks that show a unique distribution through Precambrian time, with abundant deposition from approximately Ga, reaching a volumetric peak at Ga, disappearing at Ga and returning at to by: 1. In this chapter, I survey ideas of the concept of species, as they apply to the human evolutionary record. I discuss the question of the meaning of a genus, concluding that all species since the separation of the human line from that of the chimpanzee (and possibly including the chimpanzee lineage as well) should be placed in a single genus, for which the prior available name is Homo.
Determination of highly siderophile element (HSE; Au, Pt, Pd, Ir, Os, Rh and Ru) concentrations in relatively unweathered and unaltered marine shales from the Barberton, Witwatersrand and Transvaal supergroups in the Kaapvaal Craton revealed systematic differences, interpreted to reflect secular changes in the HSE content of Mesoarchaean to Palaeoproterozoic Author: Glen T. Nwaila, Glen T. Nwaila, Hartwig E. Frimmel, Hartwig E. Frimmel. Middle Tertiary Stratigraphic Sequences of the San Joaquin Basin, California By Cari L. Johnson1 and Stephan A. Graham2 Abstract An integrated database of outcrop studies, borehole logs, and seismic-reflection profiles is used to divide Eocene through Miocene strata Cited by: 2.
The up to 12 m thick Transvaal Sequence was deposited unconformably on the Ventersdorp Sequence, and occurs in two connected depo-centres, the Transvaal and Griqualand West sub-basins, which define a x km, NE-SW elongated area of remaining exposure. This sequence originally covered an area of ~ sq. km. The point bar sequence: As a channel migrates, it often leaves a characteristic set of deposits behind called a point bar. The succession is coarsest at the base and displays a characteristic fining-upward : At any moment, the point-bar surface of the channel, from bottom to top, represents a time from bottom to top, energy (and coarseness of clasts) diminishes.
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The Stratigraphy of the Witwatersrand Sequence in the Delmas Area, Transvaal. Button. University of the Witwatersrand, - Geology - 20 pages. 0 Reviews. From inside the book. What people are saying - Write a review. We haven't found any.
The Stratigraphy of the Witwatersrand Sequence in the Delmas Area, Transvaal Issue 58 of Information circular: Author: A. Button: Publisher: University of the Witwatersrand, Original from: Pennsylvania State University: Digitized: Length: 20 pages: Export Citation: BiBTeX EndNote RefMan.
Circulars The Stratigraphy of the Witwatersrand Sequence in the Delmas Area, Transvaal. October,20pp. Button. Subsurface Stratigraphic Mapping of the Witwatersrand Sequence in the Delmas Area, Transvaal. October,8pp. Share Tweet In this section. Analytical Facilities; Research Activities. The duration of the three basins studied (Witwatersrand, Ventersdorp and Transvaal), from c.
to c. Ga is almost twice that of the entire Phanerozoic period, from which the paradigms of. The overlying Transvaal Sequence covers an area much greater than the Witwatersrand basin and comprises extensive clastic and chemical sedimentary rocks and minor volcanic rocks.
Post-Transvaal thrusting has locally complicated relationships between various stratigraphic members and the underling supergroups (e.g., Charlesworth, ). At the base of the Transvaal, the Black Reef Formation unconformably overlies the Pneil Group and a range of older stratigraphic.
EGRI CIRCULARS ; EGRI CIRCULARS A. Button. Stratigraphic Analysis of the Transvaal Sequence in the Irene-Delmas_Devon Area, Transvaal. February,12pp. Saager. The Relationship of Silver and Gold in the Basal Reef of the Witwatersrand System, South Africa.
March,19pp. Saager and P. Esselaar. A revised stratigraphic framework for the Witwatersrand Supergroup Issue 42 of Lithostratigraphic series: Authors: South African Committee for Stratigraphy.
Task Group for the Witwatersrand Supergroup, Council for Geoscience (South Africa) Editor: South African Committee for Stratigraphy: Publisher: Council for Geoscience, ISBN. The lavas are overlain with a sharp contact by the conglomerates, immature sandstones and mInor mudrocks of the Droogedal/Dwaalheuwel Forma- The Transvaal Sequence: an overview tlons; the former represents a sheet of sediment entering the Transvaal basin from the northwest and the latter formation two lobes which entered from the north and east (Eriksson et aL, ).Cited by: Highveld, especially in the Delmas area, and jf the total crop in was produced in the Transvaal.
The Orange Free State produced % of t^-a National crop in the same period, mainly in the eastern regions. The Cape Province produced % of the tot.l in. Fig. Schematic stratigraphy of the Kalahari Group in South Africa.
Fig. Schematic section through the Kalahari Group in South Africa illustrating the stratigraphic variations that can exist in the area. Fig. Locality map showing areas where Kalahari Group rocks were described. Fig. View across Sishen Iron Ore Mine, South by: In South Africa, Witwatersrand-type gold, pyrite, and uranium mineralization is sporadically represented over a considerable period of time from local occurrences in the Archean greenstone basement, through the Dominion Reef, Witwatersrand Supergroup, and Black Reef Formation of the Transvaal Sequence.
The Witwatersrand Basin formed over a period of Ma between and Ma. Pulses of sedimentation within the sequence and its precursors were episodic, occurring between Ma (Dominion Group), Ma (West Rand Group) and Ma (Central Rand Group).
Detritus was derived from a mixed granite-greenstone source of two distinct ages; the first comprises Cited by: Download Citation | Sequence Stratigraphic Development of the Neoarchean Transvaal carbonate platform, Kaapvaal Craton, South Africa | The similar to to similar to Ga lower Transvaal Author: Dawn Y.
Sumner. The Witwatersrand Basin is a largely underground geological formation which surfaces in the Witwatersrand, South holds the world's largest known gold reserves and has produced over billion ounces (o metric tons), which represents about 50% of all the gold ever mined on earth.
The basin straddles the old provinces of Transvaal and the Orange Free State, and consists of a Country: South Africa.
the Karoo Sequence in the study area are represented only by the Dwyka Group and the Vryheid Formation. This is due to the northern pinch out of the Pietermaritzburg Shale Formation and the removal through erosion of the Volksrust Formation.
The Dwyka Group comprises diamictites, mudrocks and LITHOSTRATIGRAPHY GENETIC STRATIGRAPHYFile Size: 3MB. stratigraphy: Walther’s law of facies. SUCCESSIONS OF STRATA Now think about the sequence of strata you would see in one big outcrop, or in a series of outcrops in a small area.
This is called a local section. Even though the physical dimensions of the outcrop might be fairly. Subsurface stratigraphic mapping of the Witwatersrand Sequence in the Delmas area, Transvaal Subsurface stratigraphy of the Wasatch formation of the Uinta Basin, Utah Summit Island Formation, a new Upper Cretaceous Formation in southwestern Alaska.
Abstract— Historically, there have been a range of diameter estimates for the large, deeply eroded Vredefort impact structure within the Witwatersrand Basin, South Africa.
Here, we Cited by: General principles. Sequence stratigraphy is concerned with the large-scale, three-dimensional arrangement of sedimentary strata, and the major factors that influence their geometries – such as sea-level change, contemporaneous fault movements, basin subsidence and sediment supply (cf.
reviews by Emery & Myers ; Miall ). The observational basis of sequence stratigraphy is the. The sequence stratigraphy of deepwater dans & mass transport debris Until the recent advances in high frequency seismic acquisition and deepwater exploration the.
Address: Pretoria St, Silverton, Pretoria, Phone & Email: [email protected] Let your voice be heard: Report any fraud, corruption and unethical behaviour!the northern Transvaal was the fifth South African site to R.J.
Mason's book Cave of Hearths, Makapansgat, Transvaal (), B.D. Malan states, drew in the stratigraphic sequence he had observed at the Limeworks in the early years of the. Presentation at the Liverpool Sequence Stratigraphy Conference. Karpeta, W. P. (), Volcanism and Sedimentation in Part of a Late Archaean Rift: the the Hartbeesfontein Basin, Transvaal, South Africa.