Gold Company Claims, Witwatersrand, South Africa, 1895 (Raster Image)

This layer is a georeferenced raster image of the historic paper map entitled: Bacon's new map of the Witwatersrand goldfields in the districts of Pretoria and Heidelberg, Transvaal, S. A. R. : shewing the main and other reefs, with the farms, gold mining company's claims and concessions : from information in the Surveyor-General's Department. It was published by G. W. Bacon & Co. in 1895. Scale [ca. 1:88,992].The image inside the map neatline is georeferenced to the surface of the earth and fit to the Universal Transverse Mercator (UTM Zone 35S, meters, WGS 1984) projected coordinate system. All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, index maps, legends, or other information associated with the principal map. This map shows features such as drainage, roads, railroads, cities and other human settlements, administrative boundaries, farms, homesteads, main reefs, other reefs, probable connections, and mills. Includes also notes and inset: "Enlarged map of the farms Lanlaagte, Turffontein, Dornfontein & Elandsfontein, shewing the boundaries of the principal deep level gold mining coys. on the Witwatersrand goldfields" and a geological profile of the area north of Magaliesberg to the south of Witwatersrange.This layer is part of a selection of digitally scanned and georeferenced historic maps from the Harvard Map Collection. These maps typically portray both natural and manmade features. The selection represents a range of originators, ground condition dates, scales, and map purposes.

School courses : principal subjects of the common primary course ... 1917.

Text in English and Dutch.

The South African law reports.

Editors: 1911-1912, Percival Frere Smith; 1913-1924, Gey van Pittius; 1925-1946, R.P.B. Davis.

Les chemins de fer aux colonies et dans les pays neufs.

t. 1. Rapport de la Commisssion spéciale nommée à Berlin. Conclusions de rapporteurs. Questionnaires. Réponses au questionnaire.-t. 2. Congo. Indian Midland Railway. The Southern Mahratta Railway. Usambara. Sud-Ouest brésilien. Chili. Transsibérien. Inde portugaise.-t. 3. Tunisie. Algérie. Sénégal. Soudan. Indes orientales néerlandaises. Transvaal. Angola.

The Bulletin of the South African Biological Society.

Title from cover.

Report for the year ended 31st December ... /

Description based on: 1947.

Nowaja Semlä in geographischer, naturhistorischer und volkswirthschaftlicher beziehung.

With this is bound: Fritsch, K. W. G. Reisebilder von den Canarischen inseln; Payer, Julius. Die westlichen Ortler-Alpen; Jeppe, Friedrich. Die Transvaal'sche oder Süd-Afrikanische republik-beschrieben; Rohlfs, Gerhard. Gerhard Rohlf's reise durch Nord-Afrika vom Mittelländischen meere bis zum busen von Guinea 1865 bis 1867 (Pt. 1)

Report of the director of Veterinary services and animal industry.

The 11th/12th-15th, 17th-18th reports issued in two parts.

Report of the government veterinary bacteriologist.

Mode of access: Internet.

Proceedings

United with Transvaal Institute of Mechanical Engineers To Form South African Institution of Engineers

Report

Continues the Reports of the Government Veterinary Bacteriologist of the Transvaal (Transvaal (Colony) Dept. of Agriculture)

History of South Africa, from 1795-1872,

Vols 1-2, 4th ed., carefully rev. and enl.; v. 3, 3d ed., carefully rev. and enl.

A trace element study of siderite-jasper banded iron formation in the 3.45 Ga Warrawoona Group, Pilbara Craton - Formation from hydrothermal fluids and shallow seawater

Shale-normalised rare earth element and yttrium (REE + Y) patterns for siderite-jasper couples in a banded iron formation of the 3.45 Ga Panorama Formation, Warrawoona Group, eastern Pilbara Craton, display distinct positive Y and Eu anomalies and weak positive La and Gd anomalies, combined with depleted light REE relative to middle and heavy REE. Ambient seawater and hydrothermal fluids are identified as major sources of REE + Y for the BIF. In the case of siderites, strong correlations between incompatible trace elements and trace element ratios diagnostic of seawater indicate variable input from a terrigenous source (e.g. volcanic ash). We propose a volcanic caldera setting as a likely depositional environment where jasper and siderite precipitated as alternating bands in response to episodic changes in ambient water chemistry. The episodicity was either driven by fluctuations in the intensity of hydrothermal activity or changes in magma chamber activity, which in turn controlled relative sea level. In this context, precipitation of jasper probably reflects background conditions during which seawater was saturated in silica due to evaporative conditions, while siderites were deposited most likely during intermittent periods of enhanced volcanic activity when seawater was more acidic due to the release of exhalative phases (e.g. CO2). © 2005 Elsevier B.V. All rights reserved.