Régime des chambres de commerce

Der Produktionsprozeß des Kapitals (1.1928)

Bibliographic data

Monograph

Identifikator:: 834582015

URN:: urn:nbn:de:zbw-retromon-77707

Document type:: Monograph

Title:: Régime des chambres de commerce

Place of publication:: Paris

Publisher:: Libr.-impr. réunies

Year of publication:: 1894

Scope:: 1 Online-Ressource (390 S)

Collection:: Economics Books

Usage license:: Get license information via the feedback formular.

234 ECONOMIC GEOLOGY water to the surface like the expanding compressed air in an air-lift pump. The basin of flowing wells in East Central Australia occu- pies an area of 602,000 square miles in Queensland, New South Wales, and South Australia. The wells render possible the pastoral use of the country, as the water is good enough for stock, though not for irrigation. The country consists of a foundation of contorted ancient rocks covered to the south by compact fresh-water Jurassic sandstones, and to the north by marine Permo-Carboniferous rocks. The sandstones are covered by clays, limestones, and thin sand: stones of the Rolling Downs Formation (Cretaceous). The sandstones outcrop in the eastern part of the plateau at levels of 2000 feet; and they dip westward until in the Lake Eyre basin they are 5000 feet below sea-level. Wells bored into the sandstones yield supplies of water which rise to the surface in places with sufficient force to work turbines for wool scouring and electric light plants. The water is hot, and from many wells its temperature as discharged was above 200° F., and in one well was 210°. The rise of temperature beneath the surface, if the water comes from the level of the bottom of the bore, would be sometimes as rapid as 1° F. for 22 feet in descent; rarely is the rate as low as 1° in 53 feet, which in some parts of the world is regarded as the normal gradient. The high temperature indicates that some of the water reaches the sandstones from a much greater depth than the bottom of the bore. The water is generally rich in alkaline carbonates, including those of soda, potash, lime, and magnesium. It is low in sulphates and sodium chloride. The wells reach a depth of 7000 feet, and some of them gave an initial yield of over 4,000,000 gallons a day, and many vielded over 1,000,000 gallons a day. The usual explanation was that these flowing wells dis- charge rain-water that fell on the Eastern Highlands of Australia, percolated through the sandstones from the out- crop, and is forced to the surface by the pressure of the water in the higher part of the bed. It was calculated that the renewal of the well water from the rainfall so greatly exceeded the discharge from the wells that their outflow was relatively insignificant. In 1891 the Lower House of the

Access restriction

Copyright

fullscreen: Der Produktionsprozeß des Kapitals (1.1928)

Monograph

Table of contents

Download

Monograph

This page

Image fragment

Citation links

Citation recommendation