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Authors
Affiliations
1 Department of Geological Sciences, Jadavpur University, Calcutta 700032, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 26, No 5 (1985), Pagination: 345-349
Abstract
In Daltonganj coalfield some ischolar_main beds have been studied. The ischolar_mains occur as ischolar_main casts with caliche and as coalified ones. The host rocks represent a variety of facies like channel, abandoned channel-fill, sheet flood (?), levee and flood basin. Two types of ischolar_mains are recognized. Roots of type I are laterally spreading and small, while those of type 2 are vertically extending and large compared to those of type I. These differences in ischolar_main character have been attributed to response of plant to availability of water which depended on host-rock characteristics as well as fluctuation of level of ground water. It is further noted that coalification of ischolar_main proceeded in areas of water accumulation of relatively perennial type, compared to those of accretion of caliche where there was a balance between supply and loss of water to and from the system. Moreover, pedogenic remobilization played a great role in localizing the caliche around the ischolar_mains in preference to the host rock. Rainfall appears to have been poor and intermittent.
