উত্তম অধিকারী
সহকারী প্রধান শিক্ষক
২৬ সেপ্টেম্বর, ২০২১ ০৮:২৫ অপরাহ্ণ
Lake Baikal
ধরন: সাধারণ শিক্ষা
শ্রেণি: নবম
বিষয়: English for Today
অধ্যায়: অষ্টম অধ্যায়
Lake Baikal is in a rift valley, created by the Baikal Rift Zone, where the Earth's crust is slowly pulling apart. At 636 km (395 mi) long and 79 km (49 mi) wide, Lake Baikal has the largest surface area of any freshwater lake in Asia, at 31,722 km2 (12,248 sq mi), and is the deepest lake in the world at 1,642 m (5,387 ft). The bottom of the lake is 1,186.5 m (3,893 ft) below sea level, but below this lies some 7 km (4.3 mi) of sediment, placing the rift floor some 8–11 km (5.0–6.8 mi) below the surface, the deepest continental rift on Earth.[12] In geological terms, the rift is young and active – it widens about 2 cm (0.8 in) per year.
The lake is surrounded by mountains; the Baikal Mountains on the north shore, the Barguzin Range on the northeastern shore and the Primorsky Range stretching along the western shore. The mountains and the taiga are protected as a national park. It contains 27 islands; the largest, Olkhon, is 72 km (45 mi) long and is the third-largest lake-bound island in the world. The lake is fed by as many as 330 inflowing rivers