Personal Narrative Of Travels To The Equinoctial Regions Of America During The Years 1799-1804 - Volume 3 - By Alexander Von Humboldt And Aime Bonpland.
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The Abundance Of Copper
Mentioned By The Conquistadores Of The Sixteenth Century, At A Period
When The Spaniards Were More
Attentive than they have been in latter
times to the natural productions of America, may possibly be
attributed to the
Formations of amphibolic slate, transition
clay-slate mixed with diorite, and to euphotides analogous to those I
found in the mountains of Guanabacoa.
The central and western parts of the island contain two formations of
compact limestone; one of clayey sandstone and another of gypsum. The
former has, in its aspect and composition, some resemblance to the
Jura formation. It is white, or of a clear ochre-yellow, with a dull
fracture, sometimes conchoidal, sometimes smooth; divided into thin
layers, furnishing some balls of pyromac silex, often hollow (at Rio
Canimar two leagues east of Matanzas), and petrifications of pecten,
cardites, terebratules and madrepores.* (* I saw neither gryphites nor
ammonites of Jura limestone nor the nummulites and cerites of coarse
limestone.) I found no oolitic beds, but porous beds almost bulbous,
between the Potrero del Conde de Mopox, and the port of Batabano,
resembling the spongy beds of Jura limestone in Franconia, near
Dondorf, Pegnitz, and Tumbach. Yellowish cavernous strata, with
cavities from three to four inches in diameter, alternate with strata
altogether compact,* and poorer in petrifications. (* The western part
of the island has no deep ravines; and we recognize this alternation
in travelling from the Havannah to Batabano, the deepest beds
(inclined from 30 to 40 degrees north-east) appear as we advance.) The
chain of hills that borders the plain of Guines on the north and is
linked with the Lomas de Camua, and the Tetas de Managua, belongs to
the latter variety, which is reddish white, and almost of lithographic
nature, like the Jura limestone of Pappenheim.
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