Personal Narrative Of Travels To The Equinoctial Regions Of America During The Years 1799-1804 - Volume 1 - By Alexander Von Humboldt And Aime Bonpland.
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From Pino Del Dornajito To The Crater Of The Volcano We Continued
To Ascend Without Crossing A Single Valley; For The Small Ravines
(Barancos) Do Not Merit This Name.
To the eye of the geologist the
whole island of Teneriffe is but one mountain, the almost
elliptical base of which is prolonged to the north-east, and in
which may be distinguished several systems of volcanic rocks formed
at different epochs.
The Chahorra, or Montana Colorada, and the
Urca, considered in the country as insulated volcanoes, are only
little hills abutting on the peak, and masking its pyramidal form.
The great volcano, the lateral eruptions of which have given birth
to vast promontories, is not however precisely in the centre of the
island, and this peculiarity of structure appears the less
surprising, if we recollect that, as the learned mineralogist M.
Cordier has observed, it is not perhaps the small crater of the
Piton which has been the principal agent in the changes undergone
by the island of Teneriffe.
Above the region of arborescent heaths, called Monte Verde, is the
region of ferns. Nowhere, in the temperate zone, have I seen such
an abundance of the pteris, blechnum, and asplenium; yet none of
these plants have the stateliness of the arborescent ferns which,
at the height of five or six hundred toises, form the principal
ornament of equinoctial America. The root of the Pteris aquilina
serves the inhabitants of Palma and Gomera for food; they grind it
to powder, and mix with it a quantity of barley-meal.
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