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After a long day's journey, in the course of which I observed a number of large loose nodules of white granite, we arrived at Teesee on the evening of December 29th, and were accommodated in Demba Sego's hut. The next morning he introduced me to his father, Tiggity Sego, brother to the king of Kasson, chief of Teesee.
After deposition similar particles seem often to exert a mutual attraction on each other, and congregate together in particular spots, forming lumps, nodules, and concretions.
His audacity, his joy, and his convictions were magnificent to behold. He came and he went; he seized his head between both his hands; he pushed the chairs out of their places, he piled up his books; incredible as it may seem, he rattled his precious nodules of flints together; he sent a kick here, a thump there.
The appearance of the country was remarkable, from being covered by a thick crust of common salt, and of a stratified saliferous alluvium, which seems to have been deposited as the land slowly rose above the level of the sea. The salt is white, very hard, and compact: it occurs in water worn nodules projecting from the agglutinated sand, and is associated with much gypsum.
On the other hand, their successors wore shells from the Mediterranean and amber beads from the Baltic among their numerous decorations; while for their flint they actually went as far afield as Grand Pressigny in West-Central France, the mines of which provided the butter-like nodules that represented the ne plus ultra of Neolithic luxury.
The very hard sandstone still appeared, weathered to a purple colour; the lower part was most ferruginous, and not so hard as above; in the creek below I observed a red crust of clay and nodules of ironstone. This plant was found by Mr. Cunningham in 1817 on Mount Flinders, when he called it C. teretifolia. Dr. The summit of Mount Macpherson was clear but did not afford the view I expected.
Great trees were growing in the places where the gold-washers had worked twenty years before. It is probable that the mica-slate contains here, as near Goldcronach in Franconia, and in Salzburgh, auriferous veins; but how is it possible to judge whether they be worth the expense of being wrought, or whether the ore is only in nodules, and in the less abundance in proportion as it is rich?
There were also some layers of very good coal, but the greater part of those visible were of a slaty character. Nodules of Ironstone were very frequent in the sandstone.
The Tertiary strata of that age are seen on both sides of the Rhine, in the neighbourhood of Bonn, resting unconformably on highly inclined and vertical strata of Silurian and Devonian rocks. The Brown-Coal formation of that region consists of beds of loose sand, sandstone, and conglomerate, clay with nodules of clay-iron-stone, and occasionally silex.
So far from employing heat or subterraneous fire as an agent in the mineral operations of the earth, the volcanic philosophers do not even attempt to explain upon that principle the frequent nodules of calcareous, zeolite, and other spatose and agaty substances, in those basaltic bodies which they consider as lavas.
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