(e) Central Provinces, viz., (1) Satpura region, hIopani, Pencb, Tawa ; (2) Godavery valley, Bandar, Kamaram, Singareni, Wardha or Chanda.
(f) Sikkim.
(g) Assam, in valley of Brahmaputra, viz. Disai, Jaipur, Jangi, Makum, Nazira.
There are other places in the N.W. Provinces, Assam, and Burma, where tertiary coal occurs, but it is not in sufficient quantity to constitute workable coal-fields. Of the above 37 separate coal-fields, five only (Raniganj, Karharbari, and Daltonganj in Bengal, and Nopani and Wardha in the Central Provinces) are at present (1881) worked with regularity.
Rajmahal hills form a series of low plateaus, which are situated at the point where the Ganges barns southwards to form the head of its delta. The coal-measures are exposed over 70 sq. miles, Hura, Chuparbhita, Pachwara, Mhowagarhi, and Brahmani, but doubtless extend over a vastly co-eater area underneath the younger formations. p. 68.
Birbhum and Deogarh have small detached basins in which coal occurs, but it is of little economic importance.
Karharbari has a field of coal of 11 square miles. It occurs in three principal seams, -which have an average total thickness of 16 feet, spread over an area of 81 square miles. The amount of coal is estimated at 1,360,000,000 tons, and the available portion of it at 80,000,000 tons. It is worked by three companies.
Raniganj coal-field, of 11,200 sq. miles, is on the rocky frontier of W. Bennal, 120 to 130 miles from Calcutta. The coal is in6five groups, viz.,— Upper Panchet or sq. m. sq. m.
Mahadeva, . . . 500 Ironstone shale, . . 1,400 Panchet, . . . . 1,500 Barakar, . . . . 2,000 Raniganj, . . . 5,000 Talchir; . . . . 8,000 It is the largest and most important of the areas in which coal is worked in India. It is worked by several European companies.
Jhariah coal-field is in the valley of the Damuda river. It is 16 miles west of the Raniganj field, and has an arca of 200 sq. miles. The estimated available coal here is 465,000,000 tons.
Bokara coal-field is in the valley of the Damuda. Its area is about 220 sq. miles, and the estimated available coal is 1,500,000,000 tons. One seam is 88
feet. Its position renders it difficult to be worked.
Ramgarh coal-field, in Damuda valley, has an area of 40 sq. miles. The coal is mostly of poor quality, and the field is unfavourably situated.
Karanpura coal-fields, S. and N., are at the head of the Damuda valley, and have areas of 72 sq. miles and 472 sq. miles respectively. The estimated amount of coal in N. Karanpura is 8,750, 000,000,and in S. Karanpura 75,000,000 tons.
Chope, on the Elazaribagh plateau, 2000 feet above the sea, has a small coal-field of less than one square mile.
Itkuri coal-field, 25 miles N.W. of Hazaribagh, has a few seams of inferior coal.
Aurunga coal-field, in Lohardagga district, IV. of the sources of the Damuda, in the valley of the Koel, a tributary of the Sone, has numerous seams of coal, some of large size, estimated to contain 20,000,000 tons.
Hutar coal-field, in the Koel valley, has an area of 78-6 miles.
Daltouganj coal-field, in the valley of the Koel, in the Lohardagga district, has an area of 200 sq. miles ; has a few coal-seams, estimated to contain 11,600,000 tons.
At Tattapani there is some coal, also a remark able series of hot springs.
In S. Rewa and Sohagpur, a tract in the Sone valley, covering 8000 sq. miles, coal occurs ; also at Jhilmilli (35 sq. miles), at Bisrampur, a land locked site in the central basin of Sirguja, its area being 400 sq. miles, and 1800 feet above the sea. Lakhanpur is S. of Bisrampur, and Rampur adjoining it.
Raigarh and Hingir, Udaipur, and Korba are in a wide extent of coal-rneasures, which cover an area of 1000 sq. miles, in a, country difficult of access, with seams up to 168 feet thick.
Talchir coal-field is in the valley of the Brali mani river, a tributary of the Mahanadi. It has an area of 700 sq. miles in extent, but the coal is of inferior quality, chiefly carbonaceous shale.
In the Satpura region, some good coal has been found at Mopani, and has been worked for the railway ; and coal also occurs at Tawa and Pench.