publication . Article . 1916

The Pseudotachylyte of Parijs (Orange Free State), and its Relation to 'Trap-Shotten Gneiss' and 'Flinty Crush-Rock'

S. James Shand;
Open Access
  • Published: 01 Feb 1916
Abstract
I. Introduction In the year 1913 I received from a former student of mine, Mr. P. H. S. De Wet, a consignment of rock-specimens from the neighbourhood of Parijs (O.F.S.). Among these were many pieces of a dense black rock, which, I was informed, occurs very abundantly in veins and networks in the granite. The characters of this rock seemed so remarkable that I took an early opportunity of visiting Parijs myself, in order to study the phenomena in the field. As a result of my observations, I formed the opinion that the black veins were intrusions of basic magma which had entered the granite by a process of stoping, accompanied by corrosion and solution; and a pap...
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Subjects
free text keywords: Stoping, Archaeology, Magma, Igneous rock, Geological survey, Gneiss, Free state, Geology, Paleontology
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