Environmental geological aspects of the dolomites of South …
The most important environmental aspects which influence Man's occupation of the dolomite environment include the formation of sinkholes and dolines …
Environmental geological aspects of the dolomites of South Africa
The dolomite rocks in South Africa coincide for the most part with the so-called Pretoria-Witwatersrand-Vereeniging complex which comprises the industrial heart of the country. ... 1993. 0899-5362/93 $6.00+0.00 Printed in Great Britain 1993 Pergamon Press Ltd Environmental geological aspects of the dolomites of South Africa D. B. …
Formation of modern dolomite in hypersaline pans of …
Dolomite in hypersaline pans of South Africa 1679 ... (Based on 1 : 250 000 series, Geological map (3318 Cape Town), Geological Survey of South Africa, 1990). All rivers shown are ephemeral and ...
Geolex — Drakes publications
Named Drakes Formation. Composed of grayish green dolomite or limy silty mudstone and lesser amounts of argillaceous, fine-grained dolomite or dolomitic limestone. Megafossils absent or sparse in mudstone, some dolomite beds contain abundant poorly preserved bryozoans or brachiopods.
Geolex — Jefferson publications
Jefferson Formation. Alternating dolomites and light-colored limestone; dolomites are black-weathering, highly fetid, and smell of petroleum. Thickness 750 feet. Underlies Upper Devonian-Lower …
Dolostone (Dolomite) : Properties, Formation, Occurrence, …
Dolomite is a mineral and a rock-forming mineral that is composed of calcium magnesium carbonate (CaMg(CO3)2). It is named after the French mineralogist Déodat Gratet de Dolomieu, who first described its properties in the late 18th century. Dolomite is often found in sedimentary rock formations and can occur in a variety of …
An overview of the geology of the Transvaal Supergroup dolomites (South
In the Neoarchaean intracratonic basin of the Kaapvaal craton, between approximately 2640 Ma and 2516 Ma, two successive stromatolitic carbonate platforms developed. Deposition started with the Schmidtsdrif Subgroup, which is probably oldest in the southwestern part of the basin, and which contains stromatolitic carbonates, siliciclastic …
geological map of south africa limestone dolomite
Downloadable Maps and Documents - Council for …. General. Simplified Geological Map of South Africa (±A0 size) 2. Mineral Maps...Gauteng Province - Limestone/Dolomite Deposits; Gauteng Province - Selected ... » More detailed! Limestone and Dolomite Deposits of South Africa. Limestone and Dolomite Deposits of South …
The western edge of the Griqualand West Basin
In our geophysical investigation the gravity and magnetic anomaly maps of an area which includes the western edge of the Griqualand West basin between 28°S and 29°S were …
Understanding groundwater in South Africa
"We start by looking at the geology of an area, to see if there's any potential for groundwater," says Conrad. Although the Department of Water and Sanitation has produced groundwater maps of South Africa, these only provide a rough guide. Exploration for water requires much more detailed information.
Guidelines for sinkhole and subsidence rehabilitation based …
1. Introduction. Engineering problems related to karst features, including sinkholes and subsidences, on carbonate (limestone and dolomite) and evaporite (gypsum and salt) rocks is common all over the world, including the United States of America, United Kingdom, Europe, Asia and Africa and have been documented by …
An overview of the geology of the Transvaal …
In South Africa, the Malmani Subgroup has a sheet-like geometry (Eriksson and Altermann, 1998) and is divided into five …
Geolex — Knox publications
In this area, the Knox is subdivided into ascending Copper Ridge Dolomite, Chepultepec Dolomite, Longview Limestone, Newala Limestone, and Odenville Limestone. Odenville reaches a maximum thickness of 366 ft. Unconformably underlies undifferentiated Middle Ordovician rocks.
Karst geomorphology and related environmental problems …
These are mainly the dolomites of the Kanye Basin in southern Botswana, which is an important dolomite karst outside South Africa. The dolomites of this basin have a similar lithostatigraphy to those of the old Transvaal province, as they belong to the Transvaal Supergroup (Altermann and Wotherspoon, 1995; Eriksson et al., 1995).
Karst geomorphology and related environmental problems …
Globally many valuable karst resources are under severe threat due to anthropogenic activities. This paper presents a review of the geomorphology of karst landforms including caves, sinkholes, etc. in southern Africa. It further presents the environmental threats and challenges faced by these karst landscapes, their genesis …
USGS Professional Paper 1151-H: The Geology of Kentucky: Ordovician …
Intertonguing of the two formations was shown on the geologic quadrangle maps, but the contact is generalized on the State geologic map by necessity of the scale. Outcrop of the Lexington Limestone in Kentucky (fig. 1) is limited to the Inner Bluegrass region, most of which is on sheet 2 of the geologic map, with a small area on sheet 3 ...
The geology of the Great Orme, Llandudno
- Red Wharf Limestone Formation, a cherty packstone of limited extent of 0.75km2 in the central area Fig. 3: Geologic map, cross section and GVS of the Great Orme region (Grundy Ridewood, 2010) The geologic map of the Great Orme produced by the BGS has changed significantly in a short space of time (Fig. 4).
Sinkhole and subsidence size distribution across dolomitic
The Geology of South Africa. Johannesburg: Geological Society of South Africa/Pretoria: Council for Geoscience, pp 661-668. [ Links ] Richardson, S 2013. Sinkhole & subsidence record in the Chuniespoort Group Dolomite, Gauteng, South Africa. Unpublished MSc dissertation. University of Pretoria. [ Links ] Roux, P 1984.
A preliminary overview of the sinkhole record …
Karst-related sinkholes and subsidences occur on areas underlain by Chuniespoort Group dolomite bedrock in the Gauteng Province, South Africa. Although dolomite land is found across several …
geological map of dolomite and limestone and south-africa
Geology of South Africa – Show Caves of the World. The country has numerous limestone and dolomite areas suitable for karst development The total area of karst is … Simplified geology of South Africa (geologic map) » More detailed. geological map of south africa liourcompanyne dolomite – … geological map of south africa …
Limestone and Dolomite Resources of Africa
2 Limestone, Dolomite and their Uses 9 2.1 Limestone 9 2.2 Dolomite 28 3 Overview of the African Continent 39 3.1 Physiography 39 3.2 Geology 41 3.3 Limestone and Dolomite Resources 50 4 Country Reviews 63 …
Dolomite Aquifers of South Africa October 2010
Republic of South Africa Tel: (012) 336 7500/ +27 12 336 7500 Fax: (012) 324 6592/ +27 12 324 6592 This report should be cited as: Republic of South Africa, Department of Water Affair, 2008: A Guideline for the Assessment, Planning and Management of Groundwater Resources in South Africa, Edition 2. Pretoria. Second version by:
ANALYTICAL STUDY OF DOLOMITE SINKHOLES IN CENTURION, SOUTH AFRICA
In this study, the appraisal of sinkhole propagation was facilitated with the geological data acquired along the Gautrain route through Centurion, South Africa. This paper presents the conceptualized 'angle of draw' of dolomite overburden layers into cavities, with Terzaghi's arching in soil equation.
National Geologic Map Database
USGS (U.S. Geological Survey) National Geologic Map Database. U.S. Department of the Interior | U.S. Geological Survey Supported by the National Cooperative Geologic Mapping Program Page Contact Information: Personnel Page Last Modified: Wed Sep 4 15:14:24 2024
Dolomite Aquifers of South Africa October 2010
Dolomites are South Africa's most important aquifers because borehole yields are frequently high and natural water quality good. They are often divided into semi …
Limestone: Rock Uses, Formation, Composition, …
What is Limestone? Limestone is a sedimentary rock composed primarily of calcite, a calcium carbonate mineral with a chemical composition of CaCO 3.It usually forms in clear, calm, warm, shallow marine waters. …
The distribution of the economic mineral resource …
as a neutraliser of acid soils.2,11,12 Pure limestone is composed entirely of calcium carbonate; when it contains variable amounts of magnesium, it is called dolomite.11 Limestone and dolomite are discussed together because they form in similar geological environments and are often associated in the field. To a certain extent they have similar ...
Geolex — PinesburgStation publications
Named Pinesburg Station dolomite for Pinesburg Station, Washington, Co., MD. Unit is a succession of dolomites overlying the Rockdale Run formation and underlying the Row Park limestone. Formation averages about 450 feet thick and the top of the Pinesburg Station is placed at the base of the lowest limestone bed in the overlying …
Geolex — Maynardville publications
Named Maynardville limestone. Consists of thin-bedded to massive, light-bluish gray to dark-gray, fine to coarse-grained, more or less laminated limestone, with dark-gray dolomite forming upper third of formation. Basal third contains limestone conglomerate in which small black clay balls suggest oolitic textures.
Geology and ore genesis of the manganese ore deposits …
Fig. 1. Geological sketch map of the Griqualand West and Olifantshoek Sequences in the Northern Cape Province (Leisen 1987) The manganese mineralizations All three mineralization types occur in ancient karst sinkholes within dolomites of the Campbell Group. The ores of the Eastern Belt are associated with a
Downloadable Material
Bushveld Complex, South Africa - Simplified Geology and Selected Platinum, Chromite and Vanadium Deposits (±A4 size)