File:The Quarterly journal of the Geological Society of London (12711286705).jpg

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4 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. .NoV. 1,
in the sketch. One of these dykes (P Q) ran nearly due magnetic
north and south, the other (R S) crossed it at an angle of about 50°.
Fig. 2. — Sketch-plan of the Valley in which Gold was found in
Southern Africa,
■^^f^l
L, S. V Dykes of
,U.J
Stream.
P, Q
R
T
trap-rock.
A. Place of the jackal's hole where auriferous quartz was
first found.
B, C. Pits sunk in one of the dykes.
D. Hole sunk in the gravel of the valley.
Several parties had been engaged in digging on this spot ; and, on
turning up the masses of igneous rock, some fine specimens of cry-
stalline quartz were found, several of which, when broken, were found
to contain small nuggets of gold in their cavities. These masses of
quartz were peculiar in appearance *, consisting of a plate of opake white
quartz with masses of crystals growing from one side over that which
lies undermost in the earth. The gold was in the cavities of the plates.
It appeared to me that the plates were veinstones, which had been
detached in the decomposition of the dyke with its contained vein,
for, although I could not detect a regular vein, such as I shall have
to describe presently, yet I believe there was one, but the partial de-
composition of the surface prevented me tracing it. Just at the
junction (A), a mass of blue rock was found, some of which had been

  • I have never seen anything like them in the Colony, though quartz abounds
everywhere.
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Source https://www.flickr.com/photos/biodivlibrary/12711286705
Author Geological Society of London
Full title
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The Quarterly journal of the Geological Society of London.
Page ID
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35614558
Item ID
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110213 (Find related Wikimedia Commons images)
Title ID
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51125
Page numbers
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Page 4
BHL Page URL
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https://www.biodiversitylibrary.org/page/35614558
Page type
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Text
Flickr sets
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  • The Quarterly journal of the Geological Society of London. v. 11 (1855).
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Flickr posted date
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23 February 2014
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This file comes from the Biodiversity Heritage Library.

This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing.

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current20:33, 26 August 2015Thumbnail for version as of 20:33, 26 August 20151,828 × 3,200 (785 KB)Fæ (talk | contribs)== {{int:filedesc}} == {{BHL | title = The Quarterly journal of the Geological Society of London. | source = http://www.flickr.com/photos/biodivlibrary/12711286705 | description = 4 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. .NoV. 1, <br> in the sketch. On...

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