Quartzite Sentence Examples
The islands are of ironstone formation overlying quartzite and crystalline schists.
Sawatch quartzite 50 350 ft.
The oldest rocks are gneiss, schist and quartzite, the schist often containing gold.
The Nieuwerust beds contain quartzite, arkose and shales.
Examined more closely these are found to be vast accumulations of blocks of quartzite, irregular in form, but having a tendency to a rude diamond shape, from 2 to 20 ft.Advertisement
Another out of many theories 1 is that the hard beds of quartzite are denuded by the disintegration of the sof ter layers.
It is not volcanic, but consists of argillaceous schist and quartzite.
In the south-east of Bosnia the predominant formations are Triassic and Palaeozoic strata with red sandstone and quartzite.
There are several series of parallel beds, interstratified with quartzite and schist, the most important being the "main reef" series.
In Ankole and Koki rocks consisting of granular quartzite, schistose sandstone, red and brown sandstone, and shales with cleaved killas rest on the Archean platform and possibly represent the Lower Witwatersrand beds of the Transvaal.Advertisement
In Murua (Woodlark I.) are quarries of the banded quartzite from which the best stone adzes found throughout south-east New Guinea are made.
Tuscarora quartzite 30 300
Nephin Beg, Nephin and Croagh Patrick are typical quartzite summits, the last named belonging possibly to a Silurian horizon but rising from a metamorphosed area on the south side of Clew Bay.
The mountains consist here of an ancient laminated micaceous quartzite, which is in parts a flexible sandstone known as itacolumite, and in parts a conglomerate; it is interbedded with clay-slate, mica-schist, hornblende-schist and haematite-schist, and intersected by veins of quartz.
This series is overlain unconformably by a younger quartzite of similar character, and itself rests upon the crystalline schists.Advertisement
A hard and fine-grained quartzite sandstone was quarried at Jebel Ahmar behind Heliopolis, and basalt was found thence along the eastern edge of the Delta to near the Wadi Tumilat.
The quartzite work from Jebel Ahmar near Cairo stands next, as often very fine design is found in this hard material.
The Paps of Jura, for instance, rise out of a long belt of quartzite which stretches through the islands of Islay, Jura and Scarba.
Archean gneiss, Cambrian sandstone, Silurian quartzite, limestone and schist, Jurassic sandstone and limestone, Cretaceous sandstone, and Tertiary basalts, gabbros, and granitic rocks all enter into the composition of the islands.
The Cambrian system - including the Upper (Durness-Eriboll Limestone) and the Lower (Serpulite grit, Fucoid Beds, Quartzite) - forms a narrow band which can be traced for too m.Advertisement
The mining product next in value to coal in 1908 was copper, taken chiefly in Carbon county in a zone of brecciated quartzite underlying schist, the original ore being chalcopyrite, with possibly some pyrite, a secondary enrichment, which has produced important bodies of chalcocite in the upper workings, but these are replaced by chalcopyrite at greater depth.
In the lower series are, in descending order, the "Serpulite grits" or "Salterclla beds," the "Fucoid beds" and the "Eriboll quartzite," which is divided into an upper "Pipe rock" and lower "Basal quartzite."
The Cambrian rocks of Ireland, a great series of purple and green shales, slates and grits with beds of quartzite, have not yet yielded sufficient fossil evidence to permit of a correlation with the Welsh rocks, and possibly some parts of the series may be transferred in the future to the overlying Ordovician.
In the Marquette district of Michigan (Lake Superior) schistose specular ore occurs in important deposits, associated with a jasper rock, in which the ore alternates with bands of red quartzite.
The geological core of the system consists of primitive argillaceous schists, capped by quartzite and broken through in places by basalt.Advertisement
It is estimated that less than 5% of the wells drilled into quartzite have encountered fracture porosity.
In past geological eras, various rocks including quartzite, grits and the Durness limestones were laid over much of the area.
At 023 049, a large fault is observed, trending approximately N-S, which juxtaposes shattered quartzite against shattered quartzite.
The oil was produced from fractured Precambrian quartzite on the summits of the buried hills.
A possible basal unconformity has been observed with a fine grained conglomerate lying on the hard Devonian quartzite.
The oil was produced from fractured PreCambrian quartzite on the summits of the buried hills.
The snowy white scree is made from quartzite rock.
But a line of quartzite blocks lies hundreds of meters ahead of the hillside too.
Beinn Eighe 57 1152 x 864 379K Beinn Eighe 's white quartzite scree spills down into Coire Dubh.
It and all the other articles in this chamber are of the same quartzite sandstone as the chamber.
Large quartzite boulder beaches lie stranded up to 50M above the current sea level.
Keep to tightly grained granites, rather than variegated designs, and consider soapstone, slate and quartzite as well.
Select a natural stone floor in slate, quartzite or travertine, or a porcelain or ceramic floor that mimics natural stone for easier maintenance.
Line the other walls with a Falling Water Pattern in slate or quartzite to coordinate.
Quartz being a mineral very resistant to weathering agencies, it forms the bulk of sands and sandstones; and when the sand grains are cemented together by a later deposit of secondary quartz a rock known as quartzite results.
The finest building stone is a beautiful green quartzite rock of dense, fine texture and lasting quality.
A layer of white quartzite pebbles covered some graves.
The rock is a very compact and fine-grained mixture of felspar, quartz and mica, often graduating to mica schist, quartzite and gneiss.