Bulletin, Vydání 71–75

Přední strana obálky
Geological Survey of Western Australia, 1917
 

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Oblíbené pasáže

Strana 12 - Pleas, calling upon the plaintiff to show cause why the verdict should not be set aside...
Strana 59 - Jones, TR, 1849, A monograph of the Entomostraca of the Cretaceous formation of England : Palaeontographical Soc.
Strana 48 - The Foraminifera of the Red Chalk of Yorkshire, Norfolk and Lincolnshire. Journ.
Strana 174 - ... been sunk upon to a depth of 25 feet. The stone is about three feet in the widest part, and is more ironstained and sugary in character than the eastern reefs, but is not so rich. The water is extremely salt, the yield from the first shaft being 6,000 gallons per day and the second 1,200 gallons. The General Roberts is north of the Athlone, and upon it a shaft has been sunk to a depth of 20 feet upon a small vein of stone which is exposed in a series of trenches for a distance of five chains....
Strana 111 - The Geological Survey of Western Australia. I. MAPS. Geological Map of Northampton : by A. Gibb Maitland. Scale, 20 chains per inch. Two sheets. Price, 2s. 6d. 1898. Geological Map of the North Lead, Kanowna : by Torrington Blatchford.
Strana 66 - The modern conception is that in a broad view the pegmatites are igneous rocks, but it is the part which water has played in their formation that has so strongly differentiated them from other igneous types . . . the chief purpose of this paper is a contribution to the aqueo-igneous theory.
Strana 66 - ... contain water (vapor), on ascension as plutonic magmas and consequent degree of cooling would separate into less and more aqueous segregations, especially at contact with the cool inclosing rock, the separation becoming ever more marked, and the aqueous part more mobile. Then : "By reason of the greatly superior mobility of the aqueous solutions, as compared with the magma, these segregations may send out branches in the form of the finest apophyses.
Strana 66 - Narragansett bay mica-schists contain typical pegmatite veins from 5 to 60 ft. wide; a mile east, veins in the schist are quartz, with some feldspar but no mica, while on another island they are quartz alone. Pegmatites occur in all formations, but — "In every pegmatite district there is one normal plutonic rock of essentially similar but slightly less acid composition, with which the pegmatite is most intimately associated, into which it may often be traced, and from which it has evidently been...
Strana 18 - BLATCHFORD, T., The Geology and Mineral Resources of the Yilgarn Goldfield, Part II.

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