File:The Quarterly journal of the Geological Society of London (13936963171).jpg
Original file (2,096 × 1,182 pixels, file size: 519 KB, MIME type: image/jpeg)
Captions
Summary
[edit]DescriptionThe Quarterly journal of the Geological Society of London (13936963171).jpg |
82 PROF. T. G. BONNET ON TWO TEAVEESES OE TEE base of the hill, crowned by the celebrated forts, is a felspar-acti- nolite rock *, possibly of igneous origin, followed by mica-schist, and a dull green rock banded with epidote, dipping much as before. The rock in this neighbourhood is stronger and less easily weathered than that higher up the valley, and recalled to my mind some of Fig. 4, — Diagram of '" stratification-foliation" in Calc-mica-schist near Col cle Sestrie r res. The lines roughly indicate micaceous layers ; the long arrow is parallel with the " cleavage-foliation " of the mass ; the small arrow shows the place where a specimen was taken for examination (p. 103). the chloritic and micaceous rocks about Zermatt or near St. Vincent in the Yal d'Aoste f. Below Fenestrelle this change in character becomes yet more marked. The rocks now are more massive, form- ing bolder crags which are no longer masked by a talus of shivery schist ; in short, the same change in the scenery may be observed Consists chiefly of epidote, actinolitic hornblende, quartz, felspar and hsema- tite, with some sphene and rutile. The microscopic structure is interesting in many ways, but it is enough for my present purpose to say that subsequent mineral rearrangement has made it difficult to be sure of the original condition of the rock, but I think that it probably was igneous, and that pressure has not been the sole agent of change. t Minerals : quartz, epidote, mica, white and brown, chlorite (probably in part, at least, replacing the latter), garnet (red), a little rutile and a colourless doubly refracting mineral of ill-defined limit and form, probably allied to zoisite or epidote. The rock is distinctly foliated and banded. The constituents, especially the white mica, are fair-sized and well defined, as if freely formed ; so if the foliation results from pressure, a good deal of mineral change has subsequently occurred. The structure is, for a schist, a little abnormal ; possibly that may be connected with the presence of a neighbouring intrusivemass. |
||
Date | |||
Source | https://www.flickr.com/photos/biodivlibrary/13936963171 | ||
Author | Geological Society of London | ||
Full title InfoField | The Quarterly journal of the Geological Society of London. | ||
Page ID InfoField | 36939863 | ||
Item ID InfoField | 113696 (Find related Wikimedia Commons images) | ||
Title ID InfoField | 51125 | ||
Page numbers InfoField | Page 80 | ||
BHL Page URL InfoField | https://www.biodiversitylibrary.org/page/36939863 | ||
Page type InfoField | Text | ||
Flickr sets InfoField |
|
||
Flickr tags InfoField |
|
||
Flickr posted date InfoField | 21 April 2014 | ||
Credit InfoField |
|
The categories of this image need checking. You can do so here.
|
Licensing
[edit]- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
This image was originally posted to Flickr by BioDivLibrary at https://flickr.com/photos/61021753@N02/13936963171. It was reviewed on 26 August 2015 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
26 August 2015
This image is in the public domain because it is a mere mechanical scan or photocopy of a public domain original, or – from the available evidence – is so similar to such a scan or photocopy that no copyright protection can be expected to arise. The original itself is in the public domain for the following reason:
This tag is designed for use where there may be a need to assert that any enhancements (eg brightness, contrast, colour-matching, sharpening) are in themselves insufficiently creative to generate a new copyright. It can be used where it is unknown whether any enhancements have been made, as well as when the enhancements are clear but insufficient. For known raw unenhanced scans you can use an appropriate {{PD-old}} tag instead. For usage, see Commons:When to use the PD-scan tag. Note: This tag applies to scans and photocopies only. For photographs of public domain originals taken from afar, {{PD-Art}} may be applicable. See Commons:When to use the PD-Art tag. |
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 06:54, 26 August 2015 | 2,096 × 1,182 (519 KB) | FlickreviewR 2 (talk | contribs) | Replacing image by its original image from Flickr | |
05:56, 26 August 2015 | 1,182 × 2,101 (520 KB) | Fæ (talk | contribs) | == {{int:filedesc}} == {{BHL | title = The Quarterly journal of the Geological Society of London. | source = http://www.flickr.com/photos/biodivlibrary/13936963171 | description = 82 PROF. T. G. BONNET ON TWO TEAVEESES OE TEE... |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
- Biodiversity Heritage Library maintenance missing collection
- Files from the Biodiversity Heritage Library
- Media needing category review as of 26 August 2015
- CC-BY-2.0
- Flickr images reviewed by FlickreviewR
- CC-PD-Mark
- PD-old-70-expired
- PD-scan (PD-old-70-expired)
- Photos uploaded from Flickr by Fæ using a script