Digitalphilologie

Titel

Sulphur Mountain of Ticsan

Jahr

1825

Ort

London

Nachweis

in: The Quarterly Journal 18:36 (1825), S. 406–407.

Sprache

Englisch

Typografischer Befund

Antiqua; Auszeichnung: Kursivierung.

Identifikation

Textnummer Druckausgabe: IV.38
Dateiname: 1824-Analyse_de_l-6

Statistiken

Seitenanzahl:	2
Zeichenanzahl:	2989

Weitere Fassungen
	Analyse de l’eau du Rio Vinagre, dans les Andes de Popayan, par M. Mariano de Rivero, avec des éclaircissemens géognostiques et physiques sur quelques phénomènes que présentent le soufre, l’hydrogène sulfuré et l’eau dans les volcans (Paris, 1824, Französisch)
	Analysis of the Water of the Rio Vinagre, in the Andes of Popayan, by M. Mariano de Rivero; with geognostic and Physical Illustrations of some Phenomena which are exhibited by Sulphur, Sulphuretted Hydrogen, and Water, in Volcanoes (Boston, Massachusetts, 1825, Englisch)
	Analysis of the Water of the Rio Vinagre, in the Andes of Popayan, by M. Mariano de Rivero; with geognostic and physical Illustrations of some Phænomena which are exhibited by Sulphur, Sulphuretted Hydrogen, and Water, in Volcanos (London, 1825, Englisch)
	Analyse de l‘eau du Rio Vinagre, dans les Andes de Popayan; par M. Mariano de Rivero (Extrait d’une Lettre en date du 8 octobre 1823), avec des éclaircissemens géognostiques et physiques sur quelques phénomènes que présentent le soufre, l’hydrogène sulfuré et l’eau dans les Volcans (Paris, 1825, Französisch)
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	Sulphur Mountain of Ticsan (London, 1825, Englisch)

|406|

Sulphur Mountain of Ticsan.

—“In following the Cordillera ofthe Andes towards the south,” says M. Humboldt, “what was mysurprise, when on the other side of the equator, I found that thecelebrated sulphur mountain of Ticsan (lat. 2° 10′ S.) betweenQuito and Cuença, was not composed either of trachyte or lime-stone, or gypsum, but of mica slate. This mountain of sulphur,called Quello by the Indians, is, according to my barometric mea-surement, 1250 toises above the sea. It is composed entirely ofprimitive mica slate, which is not even anthracitic as are thetransition varieties of this rock. In the ravines between Ticsan andAlausi, it is seen reposing on gneiss. The sulphur is contained in abed of quartz more than 1200 feet thick, regularly directed N. 18°E., and inclined like the mica slate 70° or 80° to the N.W. Thebed of quartz is worked open to-day. The side of Cerro Quello,in which the works were commenced ages ago, is opposed to theS.S.E., and the bed appears to prolong itself towards the N.N.W.At the same time, sulphur has not been found at the surface of theearth in that direction, at 2000 toises from Ticsan. The whole iscovered by a thick vegetation.”Towards the end of the eighteenth century, masses of sulphurwere found from two to three feet in diameter; at present, stratamuch poorer are worked, the sulphur being disseminated throughthem in lumps from three to four inches in thickness. It is ob-served, that the sulphur increases in quantity with the depth of the|407| works, but these are arranged so badly, that the lower strata arealmost inaccessible. As the quartz contains no fissures or cavities,no specimens of crystallized sulphur have been found.The sulphur does not form, as might perhaps have been sup-posed, a mass or collection of veins, but is disseminated in smallmasses, having no continuity with each other, in the quartz whichtraverses the mica slate parallel to its strata. The apertures, bywhich perhaps they have been united, are no longer visible; but allthe quartz has suffered a singular change. It is dull, frequentlyfriable, and breaks in some places with the slightest blow, whichindicates splits or cracks, which are inappreciable to the sight.The temperature of the rock does not differ from that of the atmo-sphere. The inhabitants are in the habit of attributing the earth-quakes to which their country has been exposed, to the concavitieswhich they suppose to exist beneath the sulphur mountain. In thegreat catastrophe of the 4th of February 1797, which destroyed somany thousand Indians in the province of Quito, the three placeswhere there is most sulphur, the Cerro Quello, the Azufral de Cue-saca near the town of Sbarra, and the Machay of St. Simon, near thevolcano of Antisana were only slightly agitated; but at a previousperiod, an explosion resembling that of a mine occurred in the bedof quartz itself, which contains the sulphur near Ticsan.—Ann. deChim. xxvii. 131.

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