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VOLCANIC ROCKS OF DAETMOOR.
293
cated the possible alteration of the boundary lines between the
Culm series and the Devonian rocks.
Eig. 9. — Diagram to illustrate the possible Relation of the Brent-Tor
Volcanic Series with that of Saltash.
N.
Brent Tor.
Saltash.
(The dotted lines indicate rocks now removed by denudation.)
C. Carboniferous. D. Devonian. G-. G-ranite of Kingston Down.
Fig. 10 is an attempt to show in a diagrammatic manner the down-
throw of the existing portion of the old Brent Tor volcano between
the two faults, which were first described by Dr. HoU. That these
Fig. 10. Diagram to illustrate the Manner in which part of the Brent
Tor Volcano has been faulted.
A. Chief part of the cone.
B. Part of the cone faulted down.
C. Fault running N.W. & S.E.
D. Fault running nearly N. & S.
faults originated as radiately disposed fissures emanating from the
axis of the cone seems highly probable, since similarly situated
fissures are common in many modern volcanos. From this diagram
it will be seen that by far the greater portion of the cone has been
long since removed by denudation. A considerable amount of the
downcast part must also have disappeared, leaving only the mere
mole-hill from which I have endeavoured to reconstruct the moun-
tain which geologists will always associate with the name of Sir
Henry De la Beche.
The flue of the volcano was probably situated somewhere along

the line of junction of the two faults. The superior portion was
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Source https://www.flickr.com/photos/biodivlibrary/12960528274
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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36090652
Item ID
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111264 (Find related Wikimedia Commons images)
Title ID
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51125
Page numbers
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Page 293
BHL Page URL
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https://www.biodiversitylibrary.org/page/36090652
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Text
Flickr sets
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  • The Quarterly journal of the Geological Society of London. v. 36 (1880).
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Flickr posted date
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6 March 2014
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This file comes from the Biodiversity Heritage Library.

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26 August 2015

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current15:48, 26 August 2015Thumbnail for version as of 15:48, 26 August 20151,750 × 3,200 (926 KB)Fæ (talk | contribs)== {{int:filedesc}} == {{BHL | title = The Quarterly journal of the Geological Society of London. | source = http://www.flickr.com/photos/biodivlibrary/12960528274 | description = VOLCANIC ROCKS OF DAETMOOR. <br> 293 <br> cated the possible alteration...

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