RECORD: Darwin, C. R. [list of specimens collected, numbered 1948-1997]. [4-5.1834] CUL-DAR34.113-114 Transcribed by Kees Rookmaaker, edited by John van Wyhe (Darwin Online,

REVISION HISTORY: Transcribed by Kees Rookmaaker, corrections by John van Wyhe 3.2011. 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.

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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.


From mile or two up river & opposte ship

1948 — Fossil shells — small arcae excessively numerous

1949 — Fossil shells

1950 — Shell adhaering in 1/2 circle; & primary on a Voluta or large Buccinum, looking ribs of Cornu Ammonis

1951 Shells

1952—53 Voluta same as now living?

1954—5—6—7 — Buccinum

1959—1966 — Various shells

1967. In (1969) Bed in which shells are not common

1968 Shells. —

Facing the ship

1969 — Common pale earthy sandstone, containing veins of gypsum, & salt ([blank]): close above fossil shells but seldom containing them: it is generally not so fine or pure, but marked with ferruginous lines

1970 — Hard concretionary calcareo-[mefises] in the above

1971 — Calcareo-sandstone hard, often containing shells especially Venus in large concrete balls (externally dark rust red) in middle bed

There was a specimen of coarsse agglutinated sand

113 verso

2001 — Mytilus on surface Santa Cruz — 350 plain


1972 Shells same as (1950)

1973 shel Arca

1974 Vitula. bed of river modern even yet retaining partly its color. —

Fossil wood found in bed of river & low plains (high up river) supposed to belong to gr. Oyster formation

1975 western. Curious if it should turn out of tropical character as proving a presumption such productions flourished in Lat 50° south

1976—1977 Wood

1978—1979 — Partly same specimen

1980 A superior surface of lava cellular (in many cases far more so)

1981 D common highly sonorous l. (with olivine) —

1982 B columnar (hexagon) l. (with olivine)

1983 B C calcareous matter filling up intervals of above l.

1984 G do with white crystals

1986 K do greyer, rather coarser with very many do crystals; summit of high land — April 29th [1834]

1987 M — do — cellular

1988 L Pale grey lava with few crystals — (often much laminated.) true (L) was thus: letter belonging to this lost:

1989 Q Dark heavy compact l. with grey spots

114 verso

x in jar Fine grained compact marl" exactly the same (1969) only tinge of green color

O is same as (H)

1990 P Essentially same [siliced] — alluvium fine grained substance as (1969) but of a green color

1991 R same as (1969) only more laminated & ferruginous

1992 H white aluminous substance (not effervesce) with minute extraneous particles — like mortar forming bands in such as (1969) sleeping place

1993 E Loosely agglutinated sand, with white & yellow bands beneath lava very common"

1994 Immense block — excessively numerous. May 1st [1834] —
x This feldspathic rock is generally less ferruginous & less porphyritic, often w sometimes without any crystal

1995 Imm. — &c &c — May 1st [1834]
Not always but frequently veined with quartz
Characteristic rocks of the Andes

1996 1997} Charact: specimens of 5 P. St. Julian Pebble —
"fallstone G & Wood B"
More or less porphyritic

Doubtless common rock of Andes in that parallel. —

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Citation: John van Wyhe, editor. 2002-. The Complete Work of Charles Darwin Online. (

File last updated 22 March, 2013