RECORD: Darwin, C. R. Geological diary: most curiously convoluted & mingled with the surrounding substance (5.1834) CUL-DAR34.193 Transcribed by Kees Rookmaaker, edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed by Kees Rookmaaker, corrections and editing by John van Wyhe 4.2011. RN2

NOTE: This document, part of the largest scientific document composed by Darwin during the voyage of the Beagle, is written mostly in ink. Marginal notes are here integrated into the text.

Editorial symbols used in the transcription:
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Reproduced with the permission of the Syndics of Cambridge University Library and William Huxley Darwin.

See the introduction to the Geological Diary by Gordon Chancellor.


193

most curiously convoluted & mingled with the surrounding substance. — at (c) I have drawn these curves as carefully as I could (drawing them on the spot): but the regularity & number of the folds is not here at all well represented. At (H) there is a regular anticlinal line of the clay bed. I could trace every inch of it excepting low in the centre. — all violence is here out of the question: how could current separate & incline at 65° the two substances: how could currents produce such curves synclinal & anticlinal lines:

Cliff — about 25 feet high, as here drawn:

Fig. 2 shows a main bed (F) about 18 inches thick, with other minor ones which dip at are composed of yellowish very sandy clay, & lie in a coarser sort:

one end dips at small angle to the South, other is twisted & bent back on itself, as represented (reminded me of the quartz in Falkland Island. —). —

In the main bed F I counted 20 small basin shaped masses, about a foot wide

193 verso

from being placed at pretty regular intervals they resembled ornaments round a building. — at beyond the main curve there were others, but not nearly so regular. —

Section about 30 feet long. —

Pebbles on Beach all Tierra del Fuego


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

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