The Borsora area lying just on the Indo-Bangladesh border where sandstones are found with a number of thin coal seams within the Shella Formation of the Jaintia Group. The coal seams are associated with Lakadong (Sylhet) Sandstone Member of the Shella Formation. The coals are generally soft and friable with brown to black colour and
at places bottom part of the seams show increasing order of lustre and hardness. They possess mostly conchoidal to uneven fractures. The coal is having low moisture (3.23-5.30wt%) and ash (2.92-10.23wt%), high volatile matter (38.83-42.42wt%), relatively high calorific value (6722- 7926 Kcal/Kg) with comparatively low fixed carbon (43.72-55.02%)
content. Total sulphur is high (2.40-4.61wt%). Calculated carbon and hydrogen content varies from 72.39-81.47wt% and 5.17-5.51wt% respectively. Collinite type of vitrinite (81.5wt%) constitutes the bulk of the macerals present in the coal and vitrinite reflectance (0.68wt%) confirms the rank as HVB stage. High sulphur of the coal is genetically related to the mode of formation of the coal seams in paralic basin. Collinite and framboidal pyrite in the coal indicate a marine environment. High concentration of Ba, V, Cr, Zr and Cu also indicate a marine influenced environment of deposition of the coal. Presence of Mo, V and Co with Mn and Cu indicate a reducing condition of deposition.

The coal can be used to produce a diverse type of by-products, in thermal power projects and in hydrogenation products. It can also be used as fuel for cement, paper mechanished brick industry and domestic purposes.