Admiral Wharton has given a most interesting sketch of Clipperton Atoll, in which he confirms the trachytic nature of the "Rock" of Clipperton, as determined by Professor Wolff from specimens collected by Mr. Jensen and kindly sent me by Professor Davidson. The photographs and specimens collected by Mr. J. T. Arundel, on which Admiral Wharton's notice is based, have enabled him to give what seems to me a natural explanation of the character of the atoll. As he says, it is "the rare case of coral forming on the lip of a volcanic cater, one part of which alone, perhaps the plug, has resisted the action of the sea, which has worn the rest of it down to the limits of wave action." The forgoing figure is a veiw of the rock (trachytic) rising to a height of sixty-two feet on the rim of the atoll. Admiral Wharton calls attention to the great depth of this lagoon, perhaps fifty fathoms, as a depth not improbable if it be the crater of an extinct volcano. It would be most interesting to have Clipperton carefully examined and mapped. In the mean time, from its analogy with Totoya and Thombia [in Fiji], it seems to me that Admiral Wharton's explanation is the only possible one. We may perhaps add that the old rim may have also been subject to atmospheric denudation and erosion, in addition to being blown away in part of some eruption. (pp. 106–107)
Note About Images: Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability — coloration and appearance of these illustrations may not perfectly resemble the original work.
La persona che ha associato un'opera con questo atto legale ha donato tale opera nel pubblico dominio rinunciando a tutti i diritti sull'opera in tutto il mondo, inclusi tutti i diritti connessi o altri diritti simili, per quanto permesso dalla legge. Puoi copiare, modificare, distribuire ed utilizzare l'opera, anche a fini commerciali, senza chiedere alcun permesso.
http://creativecommons.org/publicdomain/zero/1.0/deed.enCC0Creative Commons Zero, Public Domain Dedicationfalsefalse
Questa immagine è stata originariamente caricata su Flickr da Internet Archive Book Images all'indirizzo https://flickr.com/photos/126377022@N07/20302747259. È stata controllata in data 7 auril 2023 dal robot FlickreviewR 2 ed è stato confermato il suo rilascio sotto i termini della licenza cc-zero.
7 auril 2023
Didascalie
Aggiungi una brevissima spiegazione di ciò che questo file rappresenta
A sketch of Clipperton Rock (1899) after a photograph by J. T. Arundel. Published in the Bulletin of the Museum of Comparative Zoology at Harvard College