page_title: Sylhet Division
section_title: Geography
hierarchical_section_title: Sylhet Division / Geography
caption_attribution_description: English: Kala pahar
context_page_description: Sylhet Division is the northeastern division of Bangladesh. It is bordered by the Indian states of Meghalaya, Assam and Tripura to the north, east and south respectively, and by the Bangladeshi divisions of Chittagong to the southwest and Dhaka and Mymensingh to the west.
context_section_description: Geographically the region is surrounded by hillocks (known as tillas) from all three sides except its western plain boundary with the rest of Bengal. In the south of the region (Habiganj, Moulvibazar), eight hill ranges enter the plains of Sylhet running uniformly from the west to the east. They are: Raghunandan, Dinarpur-Shatgaon, Balishira, Bhanugach-Rajkandi, Hararganj-Singla, Patharia, Pratapgarh-Duhalia and Sorrispur-Siddheswar hill ranges. At the centre of the region is also an isolated range known as the Ita Hills.
  The region is considered one of the most picturesque and archaeologically rich regions in South Asia. It is home to three national parks; the Lawachara National Park, Khadim Nagar National Park and Satchari National Park, as well as numerous smaller parks and forests such as the Ratargul Swamp Forest, Rema-Kalenga Wildlife Sanctuary. Its burgeoning economy has contributed to the regional attractions of landscapes filled with fragrant orange and pineapple gardens as well as tea plantations. The region has a tropical monsoon climate (Köppen Am) bordering on a humid subtropical climate (Cwa) at higher elevations. The rainy season from April to October is hot and humid with very heavy showers and thunderstorms almost every day, whilst the short dry season from November to February is very warm and fairly clear. Nearly 80% of the annual average rainfall of 4,200 millimetres (170 in) occurs between May and September.
  The physiography of the division consists mainly of hill soils, encompassing a few large depressions known locally as "beels" which can be mainly classified as oxbow lakes, caused by tectonic subsidence primarily during the earthquake of 1762.
  Geologically, the division is complex having diverse sacrificial geomorphology; high topography of Plio-Miocene age such as the Khasi and Jaintia Hills and small hillocks along the border. At the centre there is a vast low laying flood plain of recent origin with saucer shaped depressions, locally called haors. There are many haors in the region and the largest ones include Hakaluki, Kawadighi, Tanguar and Hail. Available limestone deposits in different parts of the region suggest that the whole area was under the ocean in the Oligo-Miocene. In the last 150 years, three major earthquakes hit the city, at a magnitude of at least 7.5 on the Richter Scale, the last one took place in 1918, although many people are unaware that Sylhet lies on an earthquake prone zone.
caption: The highest peak in the region is Kala pahar located in the Longla Ridge (Hararganj-Singla range).
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