Tertiary Coal

1. Tertiary Coalfields in Assam

Makum, Nazira, Mikir Hills, Dilli-Jeypore and Lakhuni.
Makum coalfield in Sibsagar district is the most developed field.
Assam coals contain very low ash and high coking qualities but the sulphur content is high, as a result of which this coal is not suitable for metallurgical purposes.
But these coals are best suited for hydrogenation process and are used for making liquid fuels.

Coalfield	Location
Namchik Namphuk Coalfield	Changlang district

Garo, Khasi and Jaintia hills.
Darrangiri field == Garo hills.
Siju, Cherrapunji, Liotryngew, Maolong and Langrin coalfields == Khasi and Jaintia hills.
The estimated coal deposits of 560 million tonnes in Meghalaya are found along the southern fringe of the Shillong plateau extending over a length of 400 km.

It is found in Kalakot and surrounding regions in Jammu, south of Pirpanjal.
It is also found in Himachal Pradesh in Chamba district.
The state of Jammu and Kashmir has very limited coal
deposits. It is the Reasi Subdivision of the Udhampur district in which coal of anthracite qual-ity occurs in some widely distributed seams of 30 cm to 6 cm in thickness in association with nummulitic strata.
The coal deposits of the state do not belong to the
carboniferous period. They have their origin to the Lower Tertiary, Eocene, or Oligocene periods, and are found in association with Nummulitic limestone (Murree Series).

Tamil Nadu, Gujarat, Jammu and Kashmir, Kerala, Rajasthan, West Bengal and Puducherry.
Tamil Nadu excels all other states regarding reserves and production of lignite.

90 per cent of the reserves.
57 per cent of the production.
Neyveli Lignite fields of Cuddalore district.
These are the largest deposits of lignite in south – east Asia.
Neyveli mines suffer from the artesian structure [mining goes deep and deep].
Mining in Lignite coalfields is risky due to SPONTANEOUS COMBUSTION of lignite.

Kachchh district and Dharuch district; poor quality.
Rajasthan == Palana in Bikaner district; The 250 MW thermal plant at Bikaner wholly depends upon lignite as the basic fuel.

Confined to a few areas only.
Occurs in Nilgiri hills.
Kashmir valley, peat occurs in the alluvium of the Jhelum.
In West Bengal peat beds are noted in Kolkata and its suburbs.
In the Ganga delta, there are layers of peat which are composed of forest and rice plants.