felsite वाक्य
उदाहरण वाक्य
मोबाइल
- It is in pink felsite stone, with which most of the buildings in Armenia appear to be made.
- The sill formation noted here is the Rubh'a'Chromain which is formed of felsite, basalt and xenoliths.
- The conglomerates consist of grey feldspathic sand and well-rounded pebbles and cobbles of quartzite, granite, felsite, and quartz monzonite.
- This conglomerate is composed of a grey feldspathic sand matrix and well-rounded pebbles and cobbles of quartzite, granite, felsite, and quartz monzonite.
- These cooled to form very hard granophyre and felsite rocks in fact two'rink dykes'or the " outer " and " inner " rings.
- The existence of felsite and andesite at Haddington Island suggests it might have formed 3.7 million years ago as the subducted under the North American Plate at the Cascadia subduction zone.
- In the 1850s, mining began on stratiform native copper deposits in felsite-pebble conglomerates and in the upper zones of basalt lava flows ( locally called " amygdaloids " ).
- Felsite is a petrologic field term used to refer to very fine-grained or aphanitic, light-colored volcanic rocks which might be later reclassified after a more detailed microscopic or chemical analysis.
- Phenocrysts of feldspar occur occasionally and of quartz more seldom; but the relation of aplite to quartz-porphyry, granophyre and felsite is very close, as all these rocks have nearly the same chemical composition.
- Geologically, the two Dirrington Laws comprise Carboniferous volcanic felsite ( riebeckite ), and may be the remains of a laccolith, a type of volcanic intrusion into the surrounding sedimentary rocks of the Old Red Sandstone.
- In some cases, felsic volcanic rocks may contain phenocrysts of mafic minerals, usually hornblende, pyroxene or a feldspar mineral, and may need to be named after their phenocryst mineral, such as'hornblende-bearing felsite '.
- Cryptocrystalline or amorphous stone such as chert, flint, obsidian, and chalcedony, as well as other fine-grained stone material, such as rhyolite, felsite, and quartzite, were used as a source material for producing stone tools.
- In Seokjang-ri and in other riverine sites, stone tools were found with definite traces of Palaeolithic tradition, made of fine-grain rocks such as quartzite, porphyry, obsidian, chert, and felsite manifest Acheulian, Mousteroid, and Levalloisian characteristics.
- Only the young Mount Wrangell still shows its shield-like form; the other, commonly older volcanoes have had much of their original form removed by glacial and other erosional processes, such as Rabbit Mountain and Felsite Peak, which are now eroded to form an outcrop.
- They can contain a very great variety of minerals, the principal ones being quartz, orthoclase and plagioclase feldspars, calcite, iron oxides and graphitic, carbonaceous matters, together with ( in the coarser kinds ) fragments of such rocks as felsite, chert, slate, gneiss, various schists, and quartzite.
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