Morgan also notes that among the Iroquois rows of arrow-shaped chert heads about two feet in extent have been found lying side by side.
It is used here, however, to denote more especially the disks or almond-shaped pieces of flint or chert sometimes found cached in considerable numbers.
A perforated oval boulder ofchert was also found near Marlborough.
Holmes,[305] has described an ancient quarry in the Indian territory, Missouri, from which chert was obtained and roughed out on the spot.
At Breamore, farther south, a well-shaped pointed implement of chertwas found by Mr. E.
The material is not, as usual, flint from the Chalk, but chert from the Upper Greensand.
But he also describes three[2405] special kinds of flint or chert instruments, to which he calls particular attention.
Of this form there were two examples, both made of chert from the Upper Greensand.
Our course lay up a long ridge of hard bound clay and chert soil, in the direction of the sources of the Marameg, or, as it is now universally called and written, Merrimack.
Unfortunately for its agricultural character, the surface has been covered with a foreign diluvium of red clay filled with chips of hornstone, chert and broken quartz, which make the soil hard and compact.
In doubtful cogitation he knocked cinder and chert clusters down the steep fills, swinging his hickory stick with an air of ancient mastery.
He had discussed it with Lil on the comfortable pampas grass above the chert quarry not far from the cottage.
Above the Chert beds is a band a few feet thick known as the Chloritic Marl, which shows a passage from sand to calcareous matter.
Perhaps the finest piece of the Upper Greensand is Gore Cliff above Niton lighthouse, a great vertical wall with the cornice of dark chert strata overhanging at the top.
Then forming the top of the series are 24 feet of chert beds,--bands of a hard flinty rock called chert alternating with siliceous sandstone, the sandstone containing large concretions of rag in the same line of bedding.
Now, much of the chert is full of needles, or spicules, as they are called, of sponges, and this points to the source from which some at least of the silica was derived.
The Upper Greensand may be studied at Compton Bay, and at the Culvers; and along the shore west of Ventnor the lower cliff by the sea consists largely of masses of fallen Upper Greensand, many of which show the chert strata well.
The chert beds are very hard, and where the strata are horizontal, as above the Undercliff, project like a cornice at the top of the cliff.
Gravel pits show upwards of 30 feet of gravel, consisting of flints with some chert and ironstone, and the greatest thickness is probably considerably more than this.
In the chert may often be seen pieces of white or bluish chalcedony, generally in thin plates filling cracks in the chert.
To form the chert much of the silica has been in some manner dissolved, and deposited again in the interstices of sandstone strata.
The flats on the bank of the creek are in some parts nearly a mile wide, well grassed and openly timbered; the hills are of sandstone, but chert and coarse limestone were frequently seen on the lower ridges.
Sandstone is the prevailing rock, sometimes passing into jasper, and also into chert and coarse limestone.
Chert is a coarser and less perfectly homogeneous substance of the same nature and composition as flint.
Subsequently it changes to quartz, and the rocks assume the much harder and denser forms ofchert and novaculite, respectively.
With the flakes, knives, scrapers, arrow and spear-heads of flint, were also many specimens in chert or Lydian stone.
In most of the English potteries, however, that bed consists of several flat pieces of chert or hornstone, laid level with each other.
Being both hard and tough, it is well adapted to form the stones of pottery mills for grinding flints; it is called chert in Derbyshire, where it abounds.
In the lowest strata of crystalline breccia are rude flint and chert implements of the same type as that found elsewhere in the river-drift.
The chert and flint employed were from the gravels that lie between Newton Abbot and Torquay.
This ridge was composed of the more solid matter, chert and other pebbles, that had been in the sand under the chalk, and which by the sinking of the chalk was squeezed out like so much dough.
Chert occurs in bands and tabular masses rather than in nodules; it often replaces considerable portions of a bed of limestone (as in the Carboniferous Limestones of Ireland).
Corals and other fossils frequently occur in chert, and when sliced and microscopically examined both flint and chert often show silicified foraminifera, polyzoa &c.
Another very important series of concretionary structures are the flint nodules which occur in chalk, and the patches and bands of chert which are found in limestones.
Payne chert but other local materials were also used.
The material was better adapted for the manufacture of certain classes of small implements much in demand, and the serrated edge is simply the natural result of the mode of working of this species of chert and of the jasper.
This Devonian formation is made up chiefly of limestone strata, parted in many places by layers of chertwhich vary in thickness from half an inch to three or four inches.
The arrow heads found throughout the Salish country of southern British Columbia are chiefly formed of quartzite, thoughchert is also used.
The limestones are more or less bituminous, and frequently containchert nodules.
But here where found in mass, evidently brought from a distance, to a place where harder chert of a much better character for cutting implements abounds, they tell a different story.
Plate 21, l, illustrates a dark-brown chert blade with a concave base which was flaked either by controlled percussion or a rough-pressure technique.
Surface finds included only some scrapers, and a quartz core hammerstone, along with a few cores and more concentrated chert flakes; by far in the majority were head-fractured, carbonized rock fragments.
This chert specimen exhibits the best flaking technique of any large blades from the Tank Site.
A second specimen composed of a white chert and having a broad angular stem base finds no other parallels in the Topanga area (pl.
All of the specimens are pressure flaked and composed of either chert or obsidian.
Chert or flint pebbles for tube-mills are supplied mainly from the extensive deposits on the French and Danish coasts.
Chert or flint constitutes grinding pebbles and tube-mill linings, and is also ground up for abrasives.
Limestones lose their calcium carbonate by solution, leaving only clay with fragments of quartz or chert as impurities.
In the accompanying illustration are some typical small flint or chert implements found in McLean County.
The largest specimen shown in the center of the cut is a chert hoe or cultivating implement found by the writer.
The graptolites of the black shales are Upper Llandeilo forms, but the thin deposit of radiolarian chert may represent the rest of the Llandeilo period and part of the Arenig period also.
The former consist of intensely black muds with few fossils save graptolites, and a deposit of chert at the base which is composed of radiolaria.
Two or three dark deep-looking pools or tarns stand close to the hospice, and reminded me in their gloomy and cold aspect of the tarn which gives so much character to the hospice of the Grimsel.
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.
The rest is paved with granite blocks, chert and macadam.
This is connected north of the city with a macadam pike to Buckhead, and south of the city with a chert road to College Park, six miles beyond the city limits.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "chert" in a variety of sentences. We hope that you will now be able to make sentences using this word.
