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Contents: Introduction: 50 years of the journal: some significant landmarks/B.P. Radhakrishna and S. Viswanathan. List of selected papers: 1. Geological Society of India/L. Rama Rao. 2. Importance of Geological studies in the future development of India/K.D. Malaviya. Precambrian geology: 3. Reconsideration of some problems in the Archaean Complex of Mysore/B.P. Radhakrishna. 4. Peninsular Gneissic Complex of the Dharwar Craton - a suggested model for its evolution/B.P. Radhakrishna. 5. A proterozoic intracratonic Basin, Dyke Swarms and Thermal Evolution in South India/S.A. Drury. 6. The oldest supracrustals of the Dharwar Craton, India/S.M. Naqvi. 7. Banded iron formation of India/B.P. Radhakrishna, T.C. Devaraju and B. Mahabaleswar. 8. Archaean-proterozoic Boundary in India/B.P. Radhakrishna and M. Ramakrishnan. 9. Suspect tectono-stratigraphic terrane elements in the Indian subcontinent/B.P. Radhakrishna. Petrology: 10. The "Champion Gneiss" in the Archaean Complex of Mysore, Southern India - a review/B. Rama Rao. 11. Transformation of peninsular gneiss into Charnockite in Mysore State, India/C.S. Pichamuthu. 12. Aspects of Basalt Petrology/Arie Poldervaart. 13. Precambrian carbonatites of Tamil Nadu, South India/L.S. Borodin, V. Gopal, V.M. Moralev, V. Subramanian and V. Ponikarov. 14. The origin of the Meta-anorthositic gabbros and garnetiferous granulites of the Sittampundi Complex, Madras, India/A.S. Janardhanan and B.E. Leake. 15. Carbonatite Kimberlite Complexes of India/R.N. Sukheswala. 16. The Prakasam Alkaline Province in Andhra Pradesh, India/C. Leelanandam. 17. Indian Kimberlites and lamprophyres: mineralogical and chemical aspects/D.K. Paul. 18. The incipient charnockites of Transition Zone, Granulite Zone and Khondalite Zone of South India: contrasting mechanisms and controlling factors/G.R. Ravindra Kumar and Venkatesh Raghavan. 19. From the roots to the roof of granite: the Closepet Granite of South India/Jean-Francois Moyen, Mudlappa Jayananda, Anne Nedelec, Herve Martin, B. Mahabaleswar and Bernard Auvray. Geochemistry: 20. Contemporary trends in geochemical studies of early Precambrian greenstone-granite complexes/S. Viswanathan. 21. Geochemical studies of the precambrian of India: suggestions for future research work/S. Viswanathan and B.P. Radhakrishna. Geochronology: 22. Reconnaissance Rb-Sr dating of the precambrian rocks of Southern Peninsular India/A.R. Crawford. 23. Geochronology of the Dharwar Craton - a review/V.S. Venkatasubramanian. 24. Shrimp U-Pb ages of Detrital Zircon in Sargur Supracrustal rocks in Western Karnataka, Southern India/A.P. Nutman, B. Chadwick, M. Ramakrishnan and M.N. Viswanatha. Structural geology: 25. The tectonic framework of Assam/P. Evans. 26. Tectonics of the Cuddapah basin/S. Narayanaswami. 27. Deep main faults in South India/John C. Grady. 28. Tectonic slices of high-grade rocks in the Delhi Fold Belt of North-Central Rajasthan/Fareeduddin, A.K. Sharma and U. Bose. 29. Tectonothermal history of the Central Indian Tectonic Zone and Reactivation of Major Faults/Shear Zones/S.K. Acharyya and Abhinaba Roy. Geophysics: 30. Some recent earthquakes in peninsular India/Indra Mohan, M.V.D. Sitaram and Harsh K. Gupta. 31. A geophysical appraisal of the Purana Basins of India/T.S. Ramakrishna and A.Y.S.R. Chayanulu. 32. Thermal and crustal structure of "SONATA": A Zone of mid continental rifting in Indian Shield/Ravi Shanker. 33. A geophysical approach to the problem of seismicity in the Indian Shield/A.G.B. Reddy. 34. Variation of crustal velocity structure in India as determined from DSS studies and their implications on regional tectonics/K.L. Kaila and Kalachand Sain. Economic geology: 35. Crustal evolution and metallogeny - evidence from the Indian Shield: a review/B.P. Radhakrishna. 36. Re-Os dating of Molybdenites from Southern India: implication for Pan-African Metallogeny/M. Santosh, Katsuhiko Suzuki and Akimasa Masuda. 37. Study of lead Isotopes for investigating the origin of endogenic deposits with special reference to some Ore deposits from India/I.V. Chernyshev, Yu. G. Safonov, B.P. Radhakrishna, B. Krishna Rao, V.N. Vasudev and M. Deb. Stratigraphy: 38. Guiding principles in stratigraphy/Hubert G. Schenck. 39. The dating of the base of the Cambrian/M.F. Glaessner. 40. Cretaceous-tertiary boundary events: the Fossil Vertebrate, palaeomagnetic and radiometric evidence from Peninsular India/Ashok Sahni and Sunil Bajpai. 41. Constraints on the evolution of the Purana Basins of Peninsular India/Vivek S. Kale. Palaeontology: 42. Problems of Palaeontology/M.F. Glaessner. 43. Microfossils from the Archaean Complex of Mysore/S. Sambe Gowda and T.N. Sreenivasa. 44. Palaeontology and stratigraphy in India: retrospect and prospects/John A. Talent. 45. Indian dinosaur eggs: a review/D.M. Mohabey. Himalayan geology: 46. An outline of the structural set-up of the Kumaun Himalaya/K.S. Valdiya. 47. Himalayan thrusts and structural Belts/S.V. Srikantia. 48. Facts and theories on the Himalayas/Augusto Gansser. Geomorphology: 49. Evolution of the Sharavati Drainage, Mysore State, South India/B.P. Radhakrishna. 50. Evolution of the drainage of Cauvery in South India/R. Vaidyanadhan. Appendix.