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Maindarkar, M. M.
- Utilization of Clay Washery Waste of Bageshpura, (Karnataka) India
Authors
1 Department of Geology, Nagpur University, Nagpur, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 18, No 7 (1977), Pagination: 344-346Abstract
The waste from clay washery plant at Bageshpura (Karnataka) is an excellent source for various grades of silica sands. On an average, more than 60% of the waste is recoverable in the size range of 1.003 mm to 0.177 mm, and after magnetic separation it conforms to the industrial specifications of silica sand for manufacture of various types of glasses.- Petrography of the Lower Oligocene Limestones of Anklesvar Oil Field, Cambay Basin, Gujarat
Authors
1 Regional Laboratories, Oil and Natural Gas Commission, Baroda 390009, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 23, No 3 (1982), Pagination: 146-150Abstract
The limestones of Dadhar Formation (Lower Oligocene) in the Anklesvar oil field of Cambay basin, provides a typical example of erosional transgression. Interbedded with grey, fossiliferous shales and fine grained sandstones, these carbonate layers have been found to be biomicrudites comprising foraminiferal shells, glauconite, terrigenous sand, silt and clay, microspar patches and development of pseudospar in fossil shells. The above assemblage, especially the glauconite and recrystallized microspar and pseudospar, typically indicates a transgressive marine environment, characterised by calm, weak and shortlived currents. Most earlier workers have invoked a regressive phase for the deposition of this limestone but recent microfaunal studies and the salinity data point to an inner neritic environment transgressive phase.
The petrography provides evidences to reveal a marine environment of shallow tidal sea, wherein the marine incursion must have been characterised by tidal effects and reworking of the older sediments.