RECORD: Darwin, C. R. [1847]. Abstract of Milne-Home, On the parallel roads of Lochaber. CUL-DAR50.C28-C29. Edited by John van Wyhe (The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Christine Chua and edited by John van Wyhe 9.2021. RN3

NOTE: See record in the Darwin Online manuscript catalogue, enter its Identifier here. Reproduced with permission of the Syndics of Cambridge University Library and William Huxley Darwin. Items in CUL-DAR50.C relate to the geology of Glen Roy "Glen Roy Scraps".


[C28]

At this great height

Where did water come from in old Water courses

How does he distinguish tides [way] from river-course

Muckul sides water-worn 30 ft up rocky islet in middle. - 21 ft deep 70 wide.

{Are the rocks in Glen Glastrig smooth westward all way up the valley of 212 ft - if so patent - are they scratched? or polished.

p. 10 Mr Darwin supposes water swept rapidly

p. 11 Barrier at Gap.

13. states that I consider Glen Roy filled up to level of shelf 4.!!! the buttresses prove the contrary.

p 15 Boulder formation - roads cross it.

19 facts make me believe Glaciers agency

do Multitude of blocks on level of shelf 4. near Loch Treig

p 20 number of lakes strange - terraces in stages

[C28v]

Lakes on soft shores fill up not eat into.

Loch Tulla 474 [+] 540 [=] 1014

if Bravais right not only absolute, but intermediate height wd be different, at different places. - measures rude.

Lakes successively drained.

p 24 sudden depressions quite unaccounted for in other cases.

p 24. {Haughs I do not doubt fr. S. America are marine.

Lake gradually drained is a great advantage in his theory

[C29]

Glen Gluoy given up.

aspect cannot explain precise causes.

[C29v]

Against ice Glen Gluoy terrace [different] height against my theory

Land strictly above level of roads

Buttresses at all levels - immense duration of lakes - boulders from a distance? water scooping at L. Treig // Kilfinnin Has I believe // Boulder clay - Phenomenon occurring elsewhere = Several other lakes? gradual drying away of terraces - generality of the phenomenon - Haugh not explained. I do not know whether glacier cd block up Glen Gluoy & Kilfinnin

I cannot conceive drawing so slow over ice & from [illeg] Tombril terraces, as to form butresses in former case & shelf in latter.

Lake not round path cut off rock

size of escapes from lakes

Reference:

Milne, David. 1847. On the parallel roads of Lochaber, with remarks on the change of relative levels of sea and land in Scotland. Edinburgh New Philosophical Journal 43: 339-364. CUL-DAR139.5.1 Image PDF


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Citation: John van Wyhe, ed. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)

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