Micromorphological study of lithomarge clays overlying a complex zone of micaceous sandstones (Gondwanas) and basalts (Deccan Traps) in Brahmapuri, Maharashtra, show characteristic association of kaolinites and pedogenic carbonates indicating the influence of paleo-climate and environmental factors for their formation. Kaolinites suggest the ultimate weathering products of feldspars and micas under humid climatic conditions while pedogenic carbonates are the resultant products of arid climate. The predominant micromorphological features observed are vermiform kaolinites, secondary accumulation of micro-crystalline and macrocrystalline carbonates, lublinites, neocalcitans, calcite crystals in the inter-lamellar spaces of weathering biotite, formed under fluctuating water-table.
Micromorphology, lithomarge clay, pedogenic carbonates
