United States or Micronesia ? Vote for the TOP Country of the Week !
On the flat plateaus the occasional rains which fall once in three or four years can effect but little transport of material, and merely lower the general level by dissolving the underlying limestone, so that the plateau surface is left with a coating of nodules and blocks of insoluble flint and chert.
It seemed here to be broken by vertical cracks into large rhomboidal blocks. Further up this creek in a wild and secluded spot, observed a Natural Bridge with six feet of this chert bed at its base, and Silicious Magnesian Limestone above.
They may have owed their flexibility in part to the fluid matter which they contained in their minute pores, as before described, and in part to the permeation of sea-water while they were yet submerged. Strata of chert, grit, and marl, near St. At the western extremity of the Pyrenees, great curvatures of the strata are seen in the sea-cliffs, where the rocks consist of marl, grit, and chert.
See the particles of silica that are diffused through the limestone, hunting out each other and coming together in concretions and forming flint or chert nodules; or see them in the process of petrifaction slowly building up a tree of chalcedony or onyx in place of a tree of wood, repeating every cell, every knot, every worm-hole dead matter copying exactly a form of living matter; or see the phenomenon of crystallization everywhere; see the solution of salt mimicking, as Tyndall says, the architecture of Egypt, building up miniature pyramids, terrace upon terrace, from base to apex, forming a series of steps like those up which the traveler in Egypt is dragged by his guides!
The loam, which covered the uneven bottom of the cave, was sparingly mixed with rounded fragments of chert, and was very similar in composition to that covering the general surface of that region. This tusk, shown us by the proprietor of the cave, was 2 1/2 inches long and quite perfect; but whether it was referable to a recent or extinct species of bear, I could not determine.
Thick beds of chert occur in the Middle Purbeck filled with mollusca and cyprides of the genera already enumerated, in a beautiful state of preservation, often converted into chalcedony.
Koldewey curiously speaks of the saw-blades as 'palaeolithic. They are, of course, nothing of the sort. Characteristics: flint, chert, obsidian, green and red jasper, and quartz-crystal flakes, arrowheads, cores, and saw-blades. This ware is often very fine, so much so as to look as if wheelmade.
And the trading trips! Some of our men used to go as far as Little River for chert which they liked better for arrow-points than our own flints, being less brittle and more easily worked. That was a canoe trip, down the Scioto, down the O-hey-yo, up the Little Tenasa as far as Little River. There was adventure enough to please everybody.
Where these rivers rise again there are impressions resembling Fish, which appear to be of Jasper bedded in Limestone. Calcareous Spars, Shells converted into a kind of Agate, corallines in Marble, ores of Lead, Copper, and Zinc, and many strata of Flint, or Chert, and of Toadstone, or Lava, abound in this part of the country.
In the Brunonian movement of matter in solution, in crystallization, in chemical affinity, in polarity, in osmosis, in the growth of flint or chert nodules, in limestone formations like seeking like in these and in other activities, inert matter seems dreaming of life. The chemists have played upon this tendency in the inorganic to parody or simulate some of the forms of living matter.
Word Of The Day