دريائي ٽڪور

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درياءِ نيل ٽڪور Earth orbit کان ڏسجندي. هيءَ تصوير ناسا جي ٿورن سان پيش ڪجي ٿي.

اها ٽِڪُنڊوَر ايراضي جيڪا ڪنهن دريائي پاڻيءَ جي ساگر، سمنڊ، بيابان، ڇاڻ يا ڍنڍ، ۾ ڇوڙ ڪرڻ سان ٺهي ٿي.

A , building outwards (as a deltaic deposit) from sediment carried by the river and deposited as the water current is dissipated. Deltaic deposits of larger, heavily-laden rivers are characterized by the river channel dividing into multiple streams (distributaries), these divide and come together again to form a maze of active and inactive channels. A related notion is estuaries, which are another type of river mouth.

[edit] ٽڪور جڙڻ

This arcuate delta has formed on the south-west coastline of Greenland, near Narsarsuaq.

ٽڪنڊوَر ڊول ۽ سمنڊ سان ڊگھو دنگ هوڻ جو سبب اها رنڊڪ آهي جيڪا لَٽُ دريائي وهڪري ۾ وجھي ٿو ۽ نتيجتاً درياءُ ڪيترين ئي شاخن ۾ وراهجي وڃي ٿو جيڪي درياءَ جي مک وهڪري کان ڪنڊائتيون ٿي مختلف رخن ۾ وهندي سمنڊ ۾ ڇوڙ ڪنديون آهن.

A deposit at the mouth of a river usually roughly triangular in shape. The triangular shape and the increased width at the base are due to blocking of the river mouth by silt, with resulting continual formation of distributaries at angles to the original course. Herodotus the great historian used this term for the Nile river delta because the sediment deposit at its mouth had the shape of upper-case Greek letter Delta: Δ.

Where delta formation is river-dominated and less subject to tidal or wave action, a delta may take on a multi-lobed shape which resembles a bird's foot. مسسپي ٽڪور ان قسم جو هڪڙو مثال آهي.

هندستان ۽ بنگلاديش ۾ گنگا نديءَ جي ٽڪور دنيا جي چند ذرخيز ترين علائقن مان هڪ آهي.

The most famous delta is that of the Nile River, and it is this delta from which the term is derived, because the Nile delta has a very characteristic triangular shape, like the (upper-case) Greek letter delta ( $Δ$ ). Other rivers with notable deltas include the Amazon, the Ganges/Brahmaputra combination (this delta spans most of Bangladesh and West Bengal), the Niger, the Mississippi, the Sacramento-San Joaquin, the Rhine, the Rhône, the Danube, the Ebro, the Volga, the Lena, the Tigris-Euphrates, the Indus, the Krishna-Godavari, the Kaveri, the Ayeyarwady, and the Mekong.

In rare cases the river delta is located inside a large valley and is called an inverted river delta. ڪڏهن ڪڏهن درياءُ ڪيترين ئي شاخن ۾ وراهجي ويندو آهي، جيڪي ڪجھه فاصلي کان پوءِ وري ملي هڪ ٿي وڃڻ بعد سمنڊ ڏانهن وڌينديون آهن. اهو سمورو علائقو جنهن مان درياءُ شاخن ۾ وراهجي گذري تنهن کي اِن لينڊ ڊيلٽا (Inland Delta) يا ڀونوچ ٽڪور چئجي ٿو. اهڙيون ٽڪورون اڪثر اهڙن علائقن ۾ جڙن ٿيون جتي اڳي ڍنڍ جو پيٽ هوندو هو. نائيجر ڀونوچ ٽڪور ان جو قابل ذڪر مثال آهي.

These rock formations, which sometimes contain coal, cap the thick series of sedimentary rocks of the Allegheny Plateau in eastern North America.