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The Richat Structure, or Guelb er Richât (Arabic: قلب الريشات, romanized: Qalb ar-Rīšāt, Hassaniyya: [galb er.riːʃaːt] ⓘ), is a prominent circular geological feature in the Adrar Plateau of the Sahara. It is located near Ouadane in the Adrar Region of Mauritania.
Guelb er Richât: 28 November 2020 50 ouguiya Violet Ibn Abbas mosque, Nouakchott Teapot; musical instruments 28 November 2017 100 ouguiya Green Tower Cattle 28 November 2017 200 ouguiya Yellow Tower Camels 28 November 2017 500 ouguiya Blue Tower Trawler; fish 28 November 2017 1,000 ouguiya Brown Tower Locomotive of an ore train 28 November 2017
Guelb er Richat structure. With a diameter of almost 50 kilometers (31 mi), it has become a landmark for Space Shuttle crews. Initially interpreted as a meteorite impact structure because of its high degree of circularity, it is now thought to be merely a symmetrical uplift (circular anticline) that has been laid bare by erosion.
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The concentric Guelb er Richat is a prominent feature of the north-central region. Kediet ej Jill , near the city of Zouîrât , has an elevation of 915 metres (3,000 ft) and is the highest peak. The plateaus gradually descend toward the northeast to the barren El Djouf , or "Empty Quarter," a vast region of large sand dunes that merges into ...
In non-rarhi varieties of Bengali, that is to say northern and eastern dialects, "a" is substituted for "e" in second-person familiar forms; thus tumi bolla, khulla, khella etc. which is the original inflection, the “e” in contrast is a vowel-harmonised variant of the former, having gone through a process called abhisruti.
Bengali is typically thought to have around 100,000 separate words, of which 16,000 (16%) are considered to be তদ্ভব tôdbhôbô, or Tadbhava (inherited Indo-Aryan vocabulary), 40,000 (40%) are তৎসম tôtśômô or Tatsama (words directly borrowed from Sanskrit), and borrowings from দেশী deśi, or "indigenous" words, which are at around 16,000 (16%) of the Bengali ...
Bengali punctuation marks, apart from the downstroke দাড়ি dari (।), the Bengali equivalent of a full stop, have been adopted from western scripts and their usage is similar: Commas, semicolons, colons, quotation marks, etc. are the same as in English. Capital letters are absent in the Bengali script so proper names are unmarked.