RECORD: Sulivan, B. J. [1836.] [Three sketched sections at West Island, Keeling]. CUL-DAR41.50. Edited by John van Wyhe (The Complete Work of Charles Darwin Online, http://darwin-online.org.uk/)

REVISION HISTORY: Transcribed and edited by John van Wyhe 2024. RN1

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. The volume CUL-DAR41 contains Darwin's 'Coral Islands' essay & fair copy, 'Recapitulation and concluding remarks', Cocos Keeling, 'Cleavage' essay and related geological notes 1835-1842. Watermarked 'W FINCHER 1835'.

Leaf in the hand of B. J. Sulivan on the same paper as used by Darwin. Three sketched sections at West Island, Keeling and a small sketch map showing where they were taken (above) with a fourth 'outside house'.


50

Sections at W Island.                                                (17

[sketch]

No. 1

 H W [high water mark] 15 yds    5 yds.              200yds. 2/4t       reef.          light water 100 yds.

[sketch]

No. 2

    20 yds.              100 yds                            200 yds.

[sketch]

No. 3

 5 yds  5 yds             300 yds.                                      50 yds

S [sketch](N)  W Island

At No. 3 the reef projects further than in any other part of the islands, & the surface very smooth scattered blocks from 1 to 3 feet through, on the flat inside the reef.

Off No. 1. the breccia is broken and in some places worn level with the beach the land appeared to be gradually wearing away –

                                                          outside House.

[sketch]

H W   10ft  10yds 5yds          200 yds

[sketch]

The beach steeper & much higher than on the N Island

 The breccia appeared to be in layers dipping to the sea.

The lower, layers where the top ones were washed away much more compact.

50v

At SE Point about one mile NE of last section

[sketch]

              35ft.          8 yds      5yds         100 yds

[sketch]3 ½ ft. 4ft.    

 Breccia.

At this point the top of the breccia has been gradually carried away by the sea & thrown further up the beach the larger pieces moved about 5 yards. They were from 3 to four feet long and about 18 inches thick apparently torn off in flakes The inner part of the reef (the flat) shewed rock blocks from two to four feet.

[sketch]

     26ft. Blocks. 30yds 20 yds 50 yds

Other SE pt about half a mile northd of last–

[sketch]

      4 ft. 15 cn.                     6 ft. 4 yds 15 cn.

At this point two blocks of the breccia were laying nearly on the top of the sand hill 23 feet above the H water mark, several other pieces not quite so large were laying near the top of the bank but not so high as these the beach broader than many other parts & composed of fine sand. The reef very close to the beach.


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

File last updated 30 June, 2025