RECORD: Darwin, C. R. (details of soundings taken). (5.1834) CUL-DAR34.118-119 Transcribed by Kees Rookmaaker, edited by John van Wyhe (Darwin Online, http://darwin-online.org.uk/)
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.
12th. May. 1834
|10||34||sand or minute shingle|
|3||48||shingle (porphyry always) 1 7 2 lines long with small Corallium, shells are caught by claws|
|4||48||do V 2009 specimens|
|Lat. 51.48. Long: 64.50|
|8||55||minute shingle do|
|2||86||do 1/10 to 20th [illeg]|
|3||7 ?||do rather finer|
|3-28'||71 1/2||do " do|
|6||70||do fine with few pebbles 1/10 to 1/12th: Echinus vary|
|8||87||much greater abundance of quartz granules [illeg] more even some: slate granules & some St Julian porph: more like sand:|
|8||100||as above & beneath|
|4||80||Fine grey sand, many very minute black slate. transparent quantity rounded granules|
|8||83||minute shingle. one piece. 3: P.San Julian, commonly fine 1/20 to 1/30th|
|3||51||minute shingle 1/40 or 1/50th of|
Capt. King direct
The coast from C. fair weather to Coy inlet  cliff land
Then [Coy] coast little & 9 miles N. of C. Virgins
Porph. pebbles between Falklands & Staten —
Soundings between C. Possession & Orange (40 to 50 f ?) very fine & coarse grey sand: quartz slate: some pebbles 2 & 3 to 1/2 inch
|1.15||52||small granules of quartz with minute shingle of porphyry & slate.
There were other soundings [illeg] pretty reading to near Cape Virgins: on chart. soundings all sand
four 3 miles from shore brought up much slate, & quartz pebbles 1 or 2 inches long & one or two. —
St Julian. yellow porph. much [alluvium & synoricum] (Blain)
crossing fine between C. Virgins & Sarmientos shoal to the South the water suddenly deepens to between 40 & 50 fathom
fathom, again on coming abreast of C. Espiritu Santo shoals again submarine channel & bottom almost entirely slate, 3 or 4 lines long & quartz
On again approaching Sarmiento shoal same soundings but but finer & some very few S. Julian porphyry pebbles
Great variation within few miles shingle 3 & 4 lines, minute pebbles & the finest sand. —
Off C. Espiritu Santo a black muddy bottom (just like interfolding beds at C. Virgins with slate & porphyry many pebbles.
Terebratulae & Spatangus. —
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Citation: John van Wyhe, editor. 2002-. The Complete Work of Charles Darwin Online. (http://darwin-online.org.uk/)
File last updated 22 March, 2013