Personal Narrative Of Travels To The Equinoctial Regions Of America During The Years 1799-1804 - Volume 3 - By Alexander Von Humboldt And Aime Bonpland.



































































































































 -  (* In Germany sandstones
which belong unquestionably to red sandstone contain also (near
Weiderstadt, in Thuringia) nodules, and rounded fragments. I - Page 580
Personal Narrative Of Travels To The Equinoctial Regions Of America During The Years 1799-1804 - Volume 3 - By Alexander Von Humboldt And Aime Bonpland. - Page 580 of 635 - First - Home

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(* In Germany Sandstones Which Belong Unquestionably To Red Sandstone Contain Also (Near Weiderstadt, In Thuringia) Nodules, And Rounded Fragments.

I shall not cite the pudding-stone subordinate to the red sandstone of the Pyrenees because the age of that sandstone destitute of coal may be disputed.

Layers of very large rounded nodules of quartz are inclosed in the coal sandstone of Thuringia, and in Upper Silesia.) We there find fragments of wood, in great part monocotyledonous, and masses of brown iron-ore. Some strata, as in the Mesa de Paja, present grains of very fine quartz; I saw no fragments of porphyry or limestone. Those immense beds of sandstone that cover the Llanos of the Lower Orinoco and the Amazon well deserve the attention of travellers. In appearance they approximate to the pudding-stones of the molassus stratum, in which calcareous vestiges are also often wanting, as at Schottwyl and Diesbach in Switzerland; but they appeared to me by their position to have more relation to red sandstone. Nowhere can they be confounded with the grauwackes (fragmentary transition-rocks) which MM. Boussingault and Rivero found along the Cordilleras of New Grenada, bordering the steppes on the west. Does the want of fragments of granite, gneiss and porphyry, and the frequency of petrified wood,* (* The people of the country attribute those woods to the Alcornoco, Bowdichia virgilioides (See Nova Gen. et Spec. Plant. volume 3 page 377), and to the Chaparro bovo, Rhopala complicata. It is believed in Venezuela as in Egypt that petrified wood is formed in our times.

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