File:The Quarterly journal of the Geological Society of London (12683734204).jpg

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1856..
CHARTERS CLEAVAGE AT MONT LACHA.
385
2. Scrutineers were appointed, who, after the Ballot, reported
that Col. Portlock, K..E., F.R.S., was unanimously elected Presi-
dent; and tbat Hugh Falconer, M.D., F.R.S., was unanimously
elected a Member of Council.
ORDINARY MEETING.
Col. Portlock, President, in the Chair.
The following communications were read : —
\. On a Section near Mont Blanc.
By Major S. Charters, F.G.S.
.In a letter to Dr. Fitton, F.G.S..
On looking over an old note-book I found a Section which satisfies
me that Mr. D. Sharpe is correct in the view he has taken of the
cleavage. I send you a copy of it, which, if you have an oppor-
tunity, you may show him, — not that the observations of so unscien-
tific a geologist as I am can have any weight, but it may be satisfac-
tory to him, now that his paper has been attacked, to see that the
difference between cleavage and stratification, as exhibited at Mont
Lacha, attracted the attention of such a mere dilettante as myself,
now five years ago, — and that I scouted the idea of strata plunging
under the igneous rock that had upheaved them ; and that, until I
had made out the cleavage of Mont Lacha, I had attributed the
anomaly to reversal.
M. Blanc.
« 
JTh
cS
s
•c
o
•SjvOJ
d
.u B
^
S.E. a« 
"3
Cm
O (D
■ ^
o
So
Eh
N.W.
Crystalline schist.
Anthraciferous schist.
Crystalline schist.
The dotted lines represent the lines of cleavage perpendicular to those of stratification,
which dip to the north-west at an angle of 75°.
Ascending the torrent of La Gria, which nearly marks the sepa-
ration of the calcareous rocks of Mont Lacha from the crystalline
rocks of the Aiguille de Goute, we find a dark-coloured compact
limestone, the strata of which dip at an angle of 7^° to N.W. Pro-
ceeding further up the ravine, the calcareous rock becomes more

schistose, and frequently talcose. Belemnites and Ammonites^ in
Date
Source https://www.flickr.com/photos/biodivlibrary/12683734204
Author Geological Society of London
Full title
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The Quarterly journal of the Geological Society of London.
Page ID
InfoField
35338842
Item ID
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109655 (Find related Wikimedia Commons images)
Title ID
InfoField
51125
Page numbers
InfoField
Page 385
Names
InfoField
NameFound:Belemnites NameConfirmed:Belemnites EOLID:4780330 NameBankID:4089090
BHL Page URL
InfoField
https://www.biodiversitylibrary.org/page/35338842
Page type
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Text
Flickr sets
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  • The Quarterly journal of the Geological Society of London. v. 12 (1856).
Flickr tags
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Flickr posted date
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21 February 2014
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This file comes from the Biodiversity Heritage Library.

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current21:11, 26 August 2015Thumbnail for version as of 21:11, 26 August 20151,247 × 2,101 (472 KB)Fæ (talk | contribs)== {{int:filedesc}} == {{BHL | title = The Quarterly journal of the Geological Society of London. | source = http://www.flickr.com/photos/biodivlibrary/12683734204 | description = 1856.. <br> CHARTERS CLEAVAGE AT MONT LACHA. <br> 385 <br> 2. Scrutineer...

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