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Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains, cemented together by another mineral. Sandstones comprise about 20–25% of all sedimentary rocks. [1] Most sandstone is composed of quartz or feldspar, because they are the most resistant minerals to the weathering processes at the Earth's ...
Kurkar is the regional name for an aeolian quartz sandstone with carbonate cement, [3] in other words an eolianite or a calcarenite (calcareous sandstone or grainstone), found on the Levantine coast of the Mediterranean Sea in Turkey, [3] Syria, Lebanon, Israel, [4] the Gaza Strip [5] and northern Sinai Peninsula. [6]
Many of these countries, while retaining strong British English or American English influences, have developed their own unique dialects, which include Indian English and Philippine English. Chief among other native English dialects are Canadian English and Australian English, which rank third and fourth in the number of native speakers. [4]
Quartz is, therefore, classified structurally as a framework silicate mineral and compositionally as an oxide mineral. Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar. [9] Quartz exists in two forms, the normal α-quartz and the high-temperature β-quartz, both of which are chiral. The transformation ...
Quartzite can have a grainy, glassy, sandpaper-like surface. Quartzite is a hard, non-foliated metamorphic rock which was originally pure quartz sandstone. [1] [2] Sandstone is converted into quartzite through heating and pressure usually related to tectonic compression within orogenic belts.
This is a select list of Cornish dialect words in English—while some of these terms are obsolete others remain in use. [1] [2] Many Cornish dialect words have their origins in the Cornish language and others belong to the West Saxon group of dialects which includes West Country English: consequently words listed may not be exclusive to Cornwall.
Language portal; This category contains both accents and dialects specific to groups of speakers of the English language. General pronunciation issues that are not specific to a single dialect are categorized under the English phonology category.
Yorkstone or York stone is a variety of sandstone, specifically from quarries in Yorkshire that have been worked since the middle ages. [1] Yorkstone is a tight grained, Carboniferous sedimentary rock. The stone consists of quartz, mica, feldspar, clay and iron oxides. The ratio of quartz to mica varies considerably.