RECORD: Darwin, C. R. Geological diary: Examined with Mr Alison shells on Hills [Valparaiso]. [2.1835] CUL-DAR36.424 Transcribed by Kees Rookmaaker, edited by John van Wyhe (Darwin Online,

REVISION HISTORY: Transcribed by Kees Rookmaaker, corrections and editing by John van Wyhe 6.2011. RN1

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. Folio is continuation of geological diary for Chile from DAR36.420-422. See Beagle Diary pages 525-536.

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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.


examined with Mr Alison shells on Hills: the result of our joint opinion. —

When they appear certainly to be a marine deposit, we prefer from their occurring on in each case on flat points in a thick & even bed of much comminuted numerous shells, raised with earth, & some entire: very old & decomposed, stained reddish & far from fr water. & in two points, the coast in praecipitation is inaccessible. Why should people bring shells. from where they cannot ascend to a point, where there is not a drop of water: The highest of these stations is shells (Nr 1). — From this elevation to about 60 ft we found them in same state: (following coast of Plajancha).

Amongst the latter, exact same sort of locality & appearance many small shells, such as Patella, Crepidula, Turbos & small muscles. — Turbos possible. Muscles impossible — Small not above 1/2 to 1/3 of inch far too small to eat. — first noticed by a [illeg]

Why should people bring such as these: — Lie above the angular fragments cemented together: — The comminuted shells like those of Tal Quiriquina & Chiloe- beach fringe edge of barranca — chiefly on points. — Some of the Concholepas perforated cannot be trusted. —

On 2d shells: occur in a band of small pieces

same state, round the summit of hill. — remains of

424 verso

perhaps old look out house. — near to lower station: similar reddened state, evidence entirely rests on number of much too small Concholepas (as people say) to eat. Turbos & especially one or two little bits of Mytilus specimen (2761). — Patches above must remain doubtful. only extended observation — (Statement of Casa Blanca) Patellae may always be neglected: number of stories of shells in the interior plains. —

Correspondent says at St Jago clock stopped at 10 minute to. —

Mr Croft1 informs me that the earthquake stopped his clock by mean time between 15-17 minutes to 12 oclock: that the clock did not stop for some time, therefore he allows these two minutes: mercury in fixed barometer oscillated quickly for a space of about an inch: in earthquake of 22d, no difference of time between St Jago & Valparaiso. — Earthquake always stronger at Valp. than S. Jago

Sea-level 30.175

1st shells 29.941 + 5 feet } these in Air 67°

2nd shells 29.580 — do 62°

؟ was not this last station my first in the last measurement

Neutral P. 29.7
Capillary A. .051
Capacity 1

1 Mr Croft has not been identified. He is also mentioned in association with a whale backbone in the Galapagos notebook, p. 4b and the information here recorded on p. 6b.

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