Slate is obtained in large quantities from the departments of Maine-ct-Loire (Angers), Ardennes (Fumay) and Mayenne (Renaz).
There are two green varieties, called in the trade "sea-green" and "unfading green," the former being used for a cheap roofing slate; and there are purplish varieties.
Goodrich, "On the Fossil Mammalia from the Stonesfield Slate," Quart.
The dark bituminous layers of clay slate, which occur intercalated among the quartzites, have led, here as elsewhere, to the hope of coming upon a seam of coal, but it is contrary to experience that coal of any value should be found in rocks of that age.
Many of the block mountains of the Great Basin are of complicated internal structure, showing rocks of all ages - slate, limestone, quartzites, granite, multi-coloured volcanic rocks, and large areas of lava overflow.
He's got a blank slate for a life time of memory.
I'm here in one piece, sort of, and you've given me a clean slate to begin act two of my life.
In 1908 the value of slate produced was $1,710,491 (out of a total production for the United States of $6,316,817).
The Daniell type consists of a teak trough divided into five cells by slate partitions coated with marine glue.
Iron, coal and slate are the chief products, and copper and cobalt may be added.
From Seatoller in Borrowdale a road traverses Honister Pass (1100 ft.), whence it descends westward, beneath the majestic Honister Crags, where green slate is quarried, into the valley containing Buttermere (94 ft.
The industries of the town include manufactures of cotton, silk, earthenware, machinery and tobacco, with brass and iron founding; while slate and stone are quarried, and there are coal, iron and lead mines in the neighbourhood.
Slate-quarrying and cutting is carried on in the south-western part of the state, in Rutland county; there are important quarries at Fair Haven, Poultney, Castleton, Wells and Pawlet.
Jager has described coprolites from the alum-slate of Gaildorf in Wurttemberg; the fish-coprolites of Burdiehouse and of Newcastle-under-Lyme are of Carboniferous age.
The name "cololites" (from the Greek K Xov, the large intestine, XLBos, stone) was given by Agassiz to fossil wormlike bodies, found in the lithographic slate of Solenhofen, which he determined to be either the petrified intestines or contents of the intestines of fishes.
There are many large slate quarries in this parish, especially at Blaenau Festiniog, the junction of three railways, London & North Western, Great Western and Festiniog, a narrow-gauge line between Portmadoc and Duffws.
Amphitherium, of the Stonesfield Slate, typifies the family Amphitheriidae, which includes the American Dryolestes, and in which some would class the European Purbeck genus Amblotherium, although Professor H.
Thousands of workmen are employed in the slate quarries.
Industries include slate quarrying, shipbuilding, iron and brass foundries, alum, vitriol, manure, guano and tobacco works.
There are black slate deposits near Martinsburg.
The sedimentary deposits include slate, limestone and sandstone.
Other minerals found here are graphite, alum, potter's clay and roofing-slate, and, besides, famous silvermines were worked at Iglau during the middle ages.
Lord Penrhyn's slate-quarries, at Bethesda, 6 m.
High, where Norna, the prophetess of Sir Walter Scott's Pirate, was supposed to have her abode and which the Norsemen called the White Mountain, in allusion to the colour of the clay slate composing it; and the Noup and Herma Ness, two of the most northerly points in Unst.
Howie doesn't remember any details of his prior life; family; studying for the priest hood, college... a blank slate and he can't find the chalk.
A flicker of light, and the clothing appeared on a slate grey slab serving as a bench near the door.
The Falkland Islands consist entirely, so far as is known, of the older Palaeozoic rocks, Lower Devonian or Upper Silurian, slightly metamorphosed and a good deal crumpled and distorted, in the low grounds clay slate and soft sandstone, and on the ridges hardened sandstone passing into the conspicuous white quartzites.
The industries of the Lake District include slate quarrying and some lead and zinc mining, and weaving, bobbin-making and pencil-making.
Slate quarries and copper and tin mines were formerly valuable.
Heat upon clay is to bake it into slate; limestone under the influence
He was tall and clothed in all black, ominous and large against the slate sky.
Considerable quantities of the following minerals have been found: barytes (heavy spar), magnetite (magnetic iron ore), and pyrolusite (manganese dioxide) in Humboldt county; roofing slate in Esmeralda county; cinnabar (ore containing quicksilver) in Washoe county; haematite in Elko and Churchill counties; cerussite and galena (lead ores) in Eureka county; and wolframite (a source of tungsten) at Round Mountain, White Pine county.
The succession of beds in descending order is as follows: - (1) Shingle consisting of pebbles of limestone, slate and other local rocks, with fragments of stalagmite and containing a few bones and worked flints.
The vats for depositing may be of enamelled iron, slate, glazed earthenware, glass, lead-lined wood, &c. The current densities and potential differences frequently used for some of the commoner metals are given in the following table, taken from M ` Millan's Treatise on Electrometallurgy.
Galena occurs in veins in the Cambrian clay-slate, accompanied by copper and iron pyrites, zinc-blende, quartz, calcspar, iron-spar, &c.; also in beds or nests within sandstones and rudimentary limestones, and in a great many other geological formations.
From the name schistos, and the mode of formation, there can be little doubt that this species was the salt which forms spontaneously on certain slaty minerals, as alum slate and bituminous shale, and which consists chiefly of the sulphates of iron and aluminium.
A thriving export trade is carried on in agricultural produce, condensed milk is manufactured, and slate is extensively quarried in the neighbourhood, while some coal is exported from the neighbouring fields.
In this district, too, as has already been remarked, is the finest scenery of the Rhine, a fact due in great part to the grotesque shapes of the quartzose rocks, left denuded of the less durable slate and sandstone.
From the alloy containing 25% of silicon, the excess of magnesium is removed by a mixture of ethyl iodide and ether and a residue consisting of slate-blue octahedral crystals of magnesium silicide is left.
Here are extensive slate quarries belonging to Lord Penrhyn.
There is considerable agricultural trade, and iron founding is carried on; while in the neighbourhood some copper, lead, granite and slate are worked and exported in small vessels; coal, timber and general merchandise being imported.
The surrounding country is well adapted to agriculture, and slate, iron ore, cement rock and limestone are found in the vicinity.
It became slate-colored or bluish-brown faience, wit!
Bismuth occurs in metalliferous veins traversing gneiss or clay-slate, and is usually associated with ores of silver and cobalt.
Marble, granite and slate quarries are worked in different districts.
HARLECH (perhaps for Hardd lech, fair slate, or Harleigh, an Anglicized variant), a town of Merionethshire, Wales, 38 m.
Other mineral substances obtained in small quantities are: pyrite, in St Lawrence county; arsenical ore, in Putnam county; red, green and purple slate, in Washington county; garnet in Warren, Essex and St Lawrence counties; emery and felspar, in Westchester county; and infusorial earth in Herkimer county.
Besides building materials, such as sandstone, slate, &c., the only mineral to be found within the canton is bituminous shale, the products of which can be used for petroleum and asphalt.
SLATE (properly Clay Slate; in M.
Many other rocks are improperly called slate, if they are thin bedded and can be used for roofing and similar purposes.
One of the best known of these is the Stonesfield slate, which is a Jurassic limestone occurring near Oxford and famous for its fossils.
In the moist and plastic slate the mineral particles slowly enlarged by the addition of new crystalline molecules.
Micas and other platy minerals (such as chlorite), which naturally grow most rapidly on their edges, would show this tendency best, and such minerals usually form a large part of the best slates; but even Sketch (by Du Noyer) of a block of variegated slate from Devil's Glen, Co.
In passing from a slate to a grit the direction of the cleavage changes so that it tends to be more nearly perpendicular to the bedding planes.
Henry took his slate and went out.
Some people said that they were what Henry Longfellow wrote on his slate that day at school.
As soon as it was read to the school, he rubbed it off the slate, and it was forgotten.
I almost forgot the little oval slate, smoothed ivory, where he figures up the latitude.
Owing to a confident reliance upon other means of determining the vessel's place, some merchantmen, and many whalemen, especially when cruising, wholly neglect to heave the log; though at the same time, and frequently more for form's sake than anything else, regularly putting down upon the customary slate the course steered by the ship, as well as the presumed average rate of progression every hour.
I gave her my braille slate to play with, thinking that the mechanical pricking of holes in the paper would amuse her and rest her mind.
She knew, too, that I sometimes write "letters to blind girls" on the slate; but I didn't suppose that she had any clear idea what a letter was.
When she saw the braille slate and paper, she said, "I will write many letters, and I will thank Santa Claus very much."
In stormy weather they are sometimes of a dark slate-color.
Of glass, and the upper one of slate. Both covers were so adapted that
Double protection being that the slate cover could be raised so as to
On a mission to ensure there was a clean slate between his mate and Darkyn, Gabriel waited in the middle of Deidre's old apartment for the Dark One to arrive.
But we know this is not the case: the child has to begin with a clean slate and learn for itself.
The contorted strata of slate and greywacke rock must have been formed at a period vastly anterior to that in which the lake of the upper valley managed to force an outlet through the enclosing barriers.
In the Eastern province the rocks are mainly quartz, gneiss and granite, with sandstone in Busoga, basalt round Mt Elgon, slate (Busoga) and iron- g stone (Busoga and Bukedi).
Iron mines, slate and stone quarries are worked at various points, and, with live stock, poultry, wool and timber form the chief exports.
The Eskimo engraved poorly, the Dene (Tinneh) embroidered in quill, the North Pacific tribes carved skilfully in horn, slate and cedar, the California tribes had nimble fingers for basketry, the Sioux gloried in feathers and painted parfleche.
Portions of a chapel remain, dating from the 13th century, and including a porch and a stone altar; while beside it are traces of a tomb hewn out of the slate, and of some domestic building which had a staircase and a pointed arch above the door.
A little slate is quarried, being taken from the rocks below the church, and exported in the small vessels which can visit Tintagel Haven in calm weather.
The town has some industry in bobbin-making, and there are slate quarries in the neighbourhood.
The most pronounced of these upfolded strata in New York form the low Shawangunk mountains, which descend, toward the S.E., to a lowland region of folded strata of limestone, slate and other rocks in Orange and Dutchess counties.
The clays will be changed to slate, the limestone will have assumed a
"Well, then," said the teacher, "you may take your slate and go out behind the schoolhouse for half an hour.
The Lower Jurassic Stonesfield slate of size).