A sound understanding of the various factors influencing and associated with the formation of sinkholes or subsidences on dolomite land is essential for the selection of appropriate rehabilitation methods. The investigation and rehabilitation of numerous sinkholes and subsidences located on dolomite in the East Rand of South Africa, …

Limestone, as used by the minerals industry, is any rock composed mostly of calcium carbonate (CaCO 3 ). Although limestone is common in many parts of the United States, it is critically absent from some. Limestone is used to produce Portland cement, as aggregate in concrete and asphalt, and in an enormous array of other products, making …

This chapter describes how epeirogenic uplift of the escarpment, followed by headward erosion by rivers into different geological formations, has sculpted different …

The Geology of South Africa. Johannesburg: Geological Society of South Africa /Pretoria: Council for Geoscience. [ Links ] Kleywegt, R J & Pike, D R 1982. Surface subsidence and sinkholes caused by lowering of the dolomitic water table on the far West Rand Gold Field of South Africa. Annals of the Geological Survey of South Africa, 16: …

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 …

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 …

The following maps and documents may be freely downloaded and used by the public: Simplified Geological Map of South Africa (±A0 size) Mineral Maps

Figure 1 Map showing the geographical as well as regional geological setting of the ferromanga­ nese wad deposits at West Wits Gold Mine and other localities on Transvaal dolomite between Johannesburg and Lichtenburg on the Highveld of South Africa. wad, developed from Malmani dolomite, were exposed. The

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

Damage to structures and loss of life have been far more severe on dolomite than on any other geological formation in South Africa. The subsidence which occurs on dolomitic terrain following development or during dewatering has given dolomite a notorious reputation and many developers have become reluctant to build on it. The problems …

Dolomite originates in the same sedimentary environments as limestone - warm, shallow, marine environments where calcium carbonate mud accumulates in the form of shell debris, fecal material, coral fragments, …

When a corrected and updated geologic map of Maryland is available you will see a notification on our web site. dikes: greenish-gray to black, medium- to fine-grained; local contact metamorphic aureoles. Red shale and soft red sandstone, siltstone; estimated thickness less than 5,000 feet. Red, maroon, and gray sandstone, silts tone …

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. …

Dolomite is a common rock-forming mineral. It is a calcium magnesium carbonate with a chemical composition of CaMg (CO 3) 2. It is the primary component of the sedimentary rock known as dolostone and the metamorphic rock known as dolomitic marble. Limestone that contains some dolomite is known as dolomitic limestone.

1. Enter Search Criteria. To narrow your search area: type in an address or place name, enter coordinates or click the map to define your search area (for advanced map tools, view the help documentation ), and/or choose a date range. Search Limits: The search result limit is 100 records; select a Country, Feature Class, and/or Feature Type to ...

Karst aquifers in limestone occur near Oudtshoorn in the Western Cape Province. These aquifers are included in this Guideline, since processes forming karst aquifers in …

The formal exploitation of mineral resources in South Africa. star ted with copper mining in Namaqualand (near Springbok in the Nor thern Cape Province) in the mid-1800s. The discover y of ...

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.

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 …

View. ... The rocks of the Transvaal Supergroup are also dominant in the study area. These include the quartzites of the Black Reef Formation, Malmani dolomites of the Chuniespoort Group, as well...

In particular, the dolomite bearing formations of the Chuniespoort Group in the northern part of the country (Northwest, Gauteng, Limpopo and Mpumulanga Provinces) and the Campbell Group in the...

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: Mon Jul 8 22:35:35 2024

The Vaal River Basin is an economically significant area situated in the interior of South Africa (SA), where mining, industrial, domestic and agricultural activities are very intense. The purpose of the study was to assess the influence of geology and anthropogenic activities on groundwater chemistry, and identify the predominant …

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 4.1 Algeria 63 4.2 Angola 69 4.3 Benin 74 4.4 Botswana 78 4.5 Burkina Faso 91 4.6 Burundi 97 4.7 Cameroon 102 4.8 Central …

Publication: Smith, E.A., 1907, The underground water resources of Alabama: Geological Survey of Alabama Monograph, no. 6, 388 p. Summary: Geographically extended to AL. Uses Knox dolomite …

Figure 1 Location map of the Dolomites (northern Italy), with ... (Dolomites, Italy): Geology, v. 29, n. 12, pp. 1123-1126. ... The Dolomites geologically belong to the south-verging eastern ...

DOLOMITE PROJECT. The Gauteng, North West and Ghaap Plateau Dolomite Units Map is the outcome of a three-year consultative process, led by the Department of Water and Sanitation (DWS). It is a consolidated map compiled from available data on dolomite (desktop) and prepared for better management of water resources of this specific rock …

Damage to structures and loss of life have been more severe on dolomite than on any other geological formation in southern Africa. The subsidence that occurs on dolomitic terrain following ...

ILISO Consulting P.O. Box 68735 Highveld 0169. g by:SolutionsOctober 2010EXECUTIVE SUMMARYDolomites are South Africa's most important aquifers because borehole yields are. requently high and natural water quality good. They are often divided into semi-independent "compa.

Limestone and dolomite products are used by three main industries in South Africa (Mineral Economics Directorate, 2003). These are the cement, metallurgical and agricultural industries, although some smaller industries are also potentially important stakeholders (These include construction, waste water treatment and purification …