Estación Regional del Noroeste


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Dr. Madhavaraju Jayagopal

Formación

  • Ph.D en Geología (Sedimentología), Departmento de Geología, Universidad de Madrás, Chennai, India
  • Maestría en Filosofía especialidad Geología (Sedimentología), Departmento de GeologíaUniversidad de Madrás, Chennai, India
  • Maestría en Ciencias especialidad en Geología, Universidad de Madrás, Chennai, India
  • Bachelor en Geología (equivalente a la Licenciatura en Ingeniero Geólogo) , Universidad de Madrás, Chennai, India

Líneas de investigación:

  1. Estudio geoquímico en las sucesiones del Cretácico Tardío y Terciario Temprano de la Cuenca de Cauvery, Sureste de la India
  2. Geoquímica de rocas clásticas del grupo de Ariyalur (Campaniano-Maastrichtiano) de la Cuenca de Cauvery, Sureste de la India.
  3. Geoquímica de calizas del Cretácico Temprano de la Formación Mural, Grupo Bisbee, Sonora, México
  4. Isotópos de Carbón y oxígeno geoquímica de caliza Mural, Grupo Bisbee, Sonora, Mexico
  5. Estudio de minerales arcillosos en las sucesiones del Cretácico temparao del Formacion Morita de la Grupo Bisbee, Sonora
  6. Geoquímica de calizas del Cretácico Temprano de la Formación Alisitos, Baja California, México
  7. Isotópos de Carbón y oxígeno de rocas calizas del Formacion Alisitos, Baja California, Mexico
  8. Estudios isotópicos de alta resolución en carbonatados de Cretácico Medio del Noroeste de México y Sureste de la India: Implicaciones en Eventos Anóxicos Oceánicos
  9. Firmas de Isotopos del carbono, oxigeno y estroncio de caliza del Maastrichtiano-Daniano del Cuenca de Cauvery, sureste de la India
  10. Geoquimica de las rocas clasticas del Proterozoico del Cuenca Khaladgi-Badhami, Norte de Karnataka, sur de la India: Implicaciones de paleointemperismo, marco tectonico y provenencia

Participación en libros:

  1. M. Faruque Hussain, V. Vanthangliana, M.E.A. Mondal, Geochemical Constraints on the Petrogenesis of theMetasedimentary Rocks Forming the Basement of the Shillong Plateau, Northeast India, Precambrian Crustal Evolution of India: Geological and Geodynamic Perspective, First Edition, , Estado: Aceptado para publicación, India, marzo de 2017

Publicaciones recientes:

  1. Armstrong-Altrin, J.S.. Balaram, V., Ramos-Vázquez, M.A., Madhavaraju, J., Verma, S.K., Arthur-James, R., , Microtextures and trapped diatoms on quartz grain surfaces in the Acapulco Beach, Mexican Pacific: An insight into Palaeoenvironment., Journal of Indian Association of Sedimentologists, diciembre de 2023; 40(2), 49-56

  2. Monreal, R., Chavez-Meraz, D., Madhavaraju, J., Cuen-Romero, F.J., Espinoza-Maldonado, I.G., , Depositional environments and transgression-regression cycles in the Mural Limestone, Central Sonora, Mexico., Journal of south American Earth Sciences, diciembre de 2022; 120, 104086

  3. Armstrong-Altrin, J.S., Ramos-Vázquez, M.A., Madhavaraju, J., Marca-Castillo, M.E., Machain-Castillo, M.L., , Geochemistry of marine sediments adjacent to the Los Tuxtlas Volcanic Complex, Gulf of Mexico: Constraints on weathering and provenance. , Applied Geochemistry, junio de 2022; 141, 105321

  4. Madhavaraju, J., Armstrong-Altrin, J.S., Selvaraj, K., Arthur James, R., , Microtextures on quartz grains from the Gulf of Mexico and the Mexican Pacific coastal sediments: implications for sedimentary processes and depositional environment. , Journal of Palaeogeography, abril de 2022; 11(2), 256-274.

  5. Armstrong-Altrin, J.S., Ramos-Vázquez, M.A., Nadia-Yutzi, H.R., Madhavaraju, J.,, Reply to the comments by Ramírez-Fernández et al. (DOI: 10.1002/gj.4266) on paper “Microtexture and U–Pb geochronology of detrital zircon grains in the Chachalacas beach, Veracruz State, Gulf of Mexico” by Armstrong-Altrinet al. (2021)., Geological Journal, marzo de 2022; 57(1346), 1348

  6. Armstrong-Altrin, J.S., Madhavaraju, J., Vega-Bautista, F., Ramos-Vázquez, M.A., Pérez-Alvarado, B.Y., Kasper-Zubillaga, J.J., Ekoa Bessa, A.Z., , Mineralogy and geochemistry of Tecolutla and Coatzacoalcos beach sediments, SW Gulf of Mexico, Applied Geochemistry, noviembre de 2021; 134, 105103 online

  7. Madhavaraju, J., Armstrong-Altrin, J.S., Arthur James, R., Hussain, S.M, Palaeoenvironment and provenance signatures inferred from quartz grain surface features: A case study from Huatabampo and Altata beaches, Gulf of California, Mexico, Journal of South American Earth Science, noviembre de 2021; 111, 103441 online

  8. Madhavaraju, J., Scott, R.W., Sial, A.N., Ramirez-Montoya, E, Chemo- and biostratigraphy of the Cretaceous Dalmiapuram Formation, Uttatur Group, Kallakudi II section, Cauvery Basin, South India, Arabian Journal of Geosciences, septiembre de 2021; 14, 1868 online

  9. Saucedo-Samaniego, J.C., Madhavaraju, J., Sial, A.N., Monreal, R., Scott, R.W., Perez-Arvizu, O, Upper Aptian-Lower Albian seawater composition and OAEs: Geochemistry of Agua Salada and Lampazos Formations, Sonora, Mexico. , Journal of South American Earth Sciences, agosto de 2021; 109, 103193. online

  10. Armstrong-Altrin, J.S., Ramos-Vázquez, M.A., Nadia-Yutzi, H.R., Madhavaraju, J., 2021, Microtexture and U-Pb geochronology of detrital zircon grains in the Chachalacas beach, Veracruz State, Gulf of Mexico, Geological Journal, mayo de 2021; 56(5), 2418-2438 online

  11. Madhavaraju, J., Armstrong-Altrin, J.S., Pillai, R.B., Pi-Puig, T, Geochemistry of sands from the Huatabampo and Altata beaches, Gulf of California, Mexico, Geological Journal, mayo de 2021; 56(5), 2398-2418 online

  12. Madhavaraju, J., Scott, R.W., Selvaraj, K., Lee, Y.I., Loser, H, Isotopic chemostratigrphy and biostratigraphy of Lower Cretaceous Alisitos Formation (Punta China section), Baja California, Mexico, Geological Journal, mayo de 2021; 56(5), 2550–2570 online

  13. Ramirez-Montoya, E., Madhavaraju, J., Monreal, R, Geochemistry of the sedimentary rocks from the Antimonio and Rio Asuncion Formations, Sonora, Mexico: Implications for weathering, provenance and chemostratigraphy, Journal of South American Earth Sciences, marzo de 2021; 106 online

  14. Madhavaraju, J., Saucedo-Samaniego, J.C., Lee, Y.I., Scott, R.W., Carlos M. González-León, C.M., Ramirez-Montoya, E., Chemostratigraphy of the Lower Cretaceous Mural Limestone, Rancho Bufalo section, Sonora, Mexico: Implications for OAE 1b., Marine and Petroleum Geology, enero de 2021; 123, 104734 online

  15. Madhavaraju, J., Rajendra, S.P., Lee, Y.I., Ramirez-Montoya, E., Ramasamy, S., Lozano-Santacruz, R., 2020. , Mineralogy and geochemistry of clastic sediments of the Terani Formation, Cauvery Basin, southern India: implications for paleoweathering, provenance and tectonic setting., Geosciences Journal, diciembre de 2020; 21, 651-667 online

  16. González-León, C.M., Madhavaraju, J., Ramírez Montoya, E., Solari, L.A., Villanueva-Amadoz, U., Monreal, R., Sánchez Medrano, P.A., 2020, Stratigraphy, detrital zircon geochronology and provenance of the Morita formation (Bisbee Group) in northeastern Sonora, Mexico, Journal of South American Earth Sciences, noviembre de 2020; 103, 102761 online

  17. Parthasarathy, P., Madhavaraju, J., Ramirez-Montoya, E., Ramasamy, S., 2020, , Geochemistry of estuarine sediments from Marakkanam area, Tamil Nadu, India: source area weathering and provenance implications., Arabian Journal of Geosciences, febrero de 2020; 13, 157 online

  18. 1. Madhavaraju, J., Saucedo-Samaniego, J.C., Loser, H., Espinoza- Maldonado, I.G., Solari, L., Monreal, R., Grijalva-Noriega, F.J., Jaques-Ayala, C., , Detrital zircon record of Mesozoic volcanic arcs in the Lower Cretaceous Mural Limestone, Northwestern Mexico., Geological Journal, julio de 2019; 54(2), 2621-2645

  19. Galindo-Ruiz, J., Madhavaraju, J., Grijalva-Noriega, F.J., Monreal, R., Espinoza-Maldonado, I.G., 2018. , Geoquimica de rocas siliciclasticas de la Formacion Corral de En medio y Arenisca Camas, cuenca Cabullona, Sonora: paleometeorizacion y procedencia. Revista Mexicana de Ciencias Geologicas, Revista Mexicana de Ciencias Geológicas, julio de 2018; 35(2), 188-202

  20. Ramirez-Montoya, E., Madhavaraju, J., Monreal, R., Gonzalez-Leon, C.M., Grijalva-Noriega, F.J.,Saucedo-Samaniego, J.C., Espinoza-Maldonado, I.G., Meteorizacion y marco tectónico de rocas siliciclasticas de la Formacion Morita, noreste de Sonora, Mexico. Revista Mexicana de Ciencias Geologicas, Revista Mexicana de Ciencias Geológicas, julio de 2018; 35(2), 103-115

  21. Madhavaraju, J., Lee, Y.I., Scott, R.W., Gonzalez-Leon, C.M., Jenkyns, H.C., Saucedo-Samaniego, J.C., Ramasamy, S.,, High-resolution carbonate isotopic study of the Mural Formation (Cerro Pimas) section, Sonora, Mexico: Implications for early Albian oceanic anoxic evernts, Journal of South American Earth Science, marzo de 2018; 82, 329-345

  22. C. M. Gonzalez-Leon, L. A. Solari, J. Madhavaraju, Stratigraphy, geochronology and regional tectonic setting of the Late Cretaceous (ca. 82-70 Ma) Cabullona basin, Sonora, Mexico , Journal of South American Earth Science, diciembre de 2017; 80, 494-511

  23. J. Madhavaraju, S.A. Pacheco-Olivas, C. M. Gonz!alezeLe!on, I. G. Espinoza-Maldonado, P.A. Sanchez-Medrano, U. Villanueva-Amadoz, R. Monreal, T. Pi-Puig, Erik Ramírez-Montoya, F. J. Grijalva-Noriega, Mineralogy and geochemistry of the Lower Cretaceous siliciclastic rocks of the Morita Formation, Sierra San Jos!e section, Sonora, Mexico , Journal of South American Earth Science, julio de 2017

  24. Madhavaraju, J, Loser, H., Scott, R.W., Sandeep S., Sial, A.N., Ramasamy, S., ,, Petrography, geochemistry and stable isotopes of carbonate rocks, Lower Cretaceous Alisitos Formation, Los Torotes section, Baja California, Mexico., Revista Mexicana de Ciencias Geológicas, julio de 2017; 34(2), 63-77

  25. Madhavaraju, J., Tom, M., Lee, Y.I., Balaram, V., Ramasamy, S., Carranza-Edwards, A., Ramachandran, A., , Provenance and tectonic settings of sands from Puerto Peñasco, Desemboque and Bahia Kino beaches, Gulf of California, Sonora, Mexico. , Journal of South American Earth Sciences, noviembre de 2016; 71, 262-275

  26. Madhavaraju, J., Erik Ramírez-Montoya, E., Monreal, R., González–León, C.M., Pi-Puig, T., Espinoza-Maldonado, I.G., Grijalva–Noriega, F.J., 2016. , Paleoclimate, paleoweathering and paleoredox conditions of Lower Cretaceous shales from the Mural Limestone, Tuape section, northern Sonora, Mexico: Constraints from clay mineralogy and geochemistry. , Revista Mexicana de Ciencias Geológicas, marzo de 2016; 33(1), 34-48

  27. Madhavaraju, J., Loser, H., Lee, Y.I., Lozano Santacruz, R., Pi-Puig, T., , Geochemistry of Lower Cretaceous limestones of the Alisitos Formation, Baja California, Mexico: implications for REE source and paleo-redox conditions. , Journal of South American Earth Sciences , marzo de 2016; 66, 149-165

  28. Ramachandran, A., Madhavaraju, J., Ramasamy, S., Lee, Y.I., Rao, S., Chawngthu, D.L., Velmurugan, K., 2016, Geochemistry of Proterozoic clastic rocks of the Kerur Formation of Kaladgi-Badami Basin, North Karnataka, South India: implications for paleoweathering and provenance. , Turkish Journal of Earthsciences, marzo de 2016; 25, 126-144

  29. Madhavaraju, J., Scott, R.W., Lee, Y.I., Bincy K.S., Ramasamy, S., , Facies, biostratigraphy, diagenesis, and depositional environments of Lower Cretaceous strata, Sierra San Jose section, Sonora (Mexico), Carnets de Géologie/Notebooks on Geology, julio de 2015; 15(10), 103-122

  30. Madhavaraju, J., Sial, A.N., Hussain, S.M., Nagarajan, R., Gonzalez-Leon, C.M., Ramasamy, S.,, Petrography and stable isotopic variations in Dalmiapuram Formation of Cauvery Basin, South India: implication on OAE1d, Chinese Journal of Geochemistry, junio de 2015; 34(3), 447-458

  31. Madhavaraju, J., Sial, A.N., Rakhinath, R., Ramasamy, S., Lee, Y.I., Ramachandran, A., Carbon, oxygen and strontium isotopic signatures in Maastrichtian-Danian limestones of the Cauvery Basin, South India., Geosciences Journal, junio de 2015; 19(2), 237-256

  32. Armstrong-Altrin, J.S., Nagarajan, R., Madhavaraju, J., Rosalez-Hoz, L., Yong Il Lee, Balaram, V., Cruz-Martínez, A., Avila-Ramírez, G, Geochemistry of the Jurassic and Upper Cretaceous shales from the Molango Region, Hidalgo, eastern Mexico: Implications for source-area weathering, provenance, and tectonic setting, Comptes Rendus Geoscience, diciembre de 2013; 345, 185-202 online

  33. Madhavaraju, J., Sial, A.N., Gonzalez-Leon, C.M., Nagarajan, R, Carbon and oxygen isotopic variations in early Albian limestone facies of the Mural Formation, Pitaycachi section, northeastern Sonora, Mexico, Revista Mexicana de Ciencias Geológicas, diciembre de 2013; 30(3), 526-539

  34. Madhavaraju, J., Yong IL Lee, Gonzalez-Leon, C.M, Carbon, oxygen and strontium isotopic signatures in Aptian-Albian limestones of the Mural Formation, Cerro Pimas area, northern Sonora, Mexico, Journal of Iberian geology, diciembre de 2013; 39(1), 73-88 online

  35. Madhavaraju, J., González-León, C.M, Depositional conditions and source of rare earth elements in carbonate strata of the Aptian-Albian Mural Formation, Pitaycachi section, northeastern Sonora, Mexico. Revista Mexicana de Ciencias Geologicas, 29, 478-491, Revista Mexicana de Ciencias Geológicas, junio de 2012; 29(2), 478-491

  36. Nagarajan, R., Madhavaraju, J., Armstrong-Altrin, J.S., Nagendra, R., 2011, Geochemistry of Neoproterozoic Limestones of Shahabad Formation, Bhima Basin, Karnataka, Southern India. Geosciences Journal, 15, 9-25, Geosciences Journal, marzo de 2012; 15, 9-25

  37. Armstrong-Altrin, J.S., Madhavaraju, J., Sial, A.N., Kasper-Zubillag, J.J., Nagarajan, R., Flores-Castro, K., 2011, Petrography and stable isotope geochemistry of the Cretaceous El Abra limestones (Actopan), Mexico: Implication on diagenesis. Journal of the Geological Society of India, 77, 349-359, Journal of the Geological Society of India, abril de 2011; 77, 349-359

  38. Madhavaraju, J., Yong Il Lee, Influence of Deccan Volcanism in the sedimentary rocks of Late Maastrichtian-Danian age of Cauvery Basin, Southeastern India: Constraints from Geochemistry., Current Science, febrero de 2010; 98(4), 528-537

  39. Madhavaraju, J., González-León, C.M., Yong Il Lee, Armstrong-Altrin, J.S., Reyes Campero, L.M., 2010, Geochemistry of the Mural Formation (Aptian-Albian) of the Bisbee Group, Northern Sonora, Mexico. Cretaceous Research, 31, 400-414, Cretaceous Research, enero de 2010; 31, 400-414

  40. Madhavaraju, J., García y Barragán, J.C., Hussain, S.M., Mohan, S.P., , Microtextures on quartz grains in the beach sediments of Puerto Peñasco and Bahia Kino, Gulf of California, Sonora, Mexico. , Revista Mexicana de Ciencias Geológicas, agosto de 2009; 26(2), 367-379

  41. Madhavaraju, J., Yong Il Lee., , Geochemistry of the Dalmiapuram Formation of the Uttatur Group (Early Cretaceous), Cauvery Basin, Southeastern India: Implications on Provenance and Paleo-redox conditions. , Revista Mexicana de Ciencias Geológicas, agosto de 2009; 26(2), 380-394.

  42. Nagarajan, R., Sial, A.N., Armstrong-Altrin, J.S., Madhavaraju, J., Nagendra, R, Carbon and oxygen isotope geochemistry of Neoproterozoic limestones of the Shahabad Formation, Bhima Basin, Karnataka, southern India, Revista Mexicana de Ciencias Geológicas, 2008; 25, 225-235

  43. Gladwin Gnana Asir, N., Ramasamy, S., Armstrong-Altrin, J.S., Madhavaraju, J., Stephen Pitchaimani, V, Depositional and diagenetic inferences of a shallow core near Tuticorin Coast, Tamil Nadu, Journal of the Geological Society of India, 2007; 70, 1021-1032

  44. Nagarajan, R., Armstrong-Altrin, J.S., Nagendra, R., Madhavaraju, J., Moutte, J, 2007. Petrography and Geochemistry of Terrigenous Sedimentary Rocks in the Neoproterozoic Rabanpalli Formation, Bhima Basin, Southern India: Implications for paleoweathering condition, provenance, and source rock composition, Journal of the Geological Society of India, 2007; 70, 297-312

  45. Nagarajan, R., Madhavaraju, J., Armstrong-Altrin, J.S., Nagendra, R., Moutte, J, Geochemistry of Neoproterozoic shales of Rabanpalli Formation, Bhima Basin, Northern Karnataka, Southern India: Implications for provenance and paleoredox conditions, Revista Mexicana de Ciencias Geológicas, 2007; 24, 150-160

  46. Ramasamy, S., Thingujam Shantikumar Singh, Madhavaraju, J. and Gladwin Gnana Asir, Petrography and Geochemistry of Pre-Ariyalur sequence in Perambalur District, Tamil Nadu – Implications on Depositional Environment and Palaeoclimate, Journal of the Geological Society of India, 2007; 69, 121-132

  47. Madhavaraju, J., Hussain, S.M., Guruvappan, M., Ramasamy, S., Mohan, S.P.,, Sequence stratigraphy of lower Niniyur Formation of Cauvery Basin, Southeastern India. , Journal of the Geological Society of India, 2006; 68, 685-694

  48. Madhavaraju, J., Yong Il Lee, Armstrong-Altrin, J.S. and Hussain, S.M, Microtextures on detrital quartz grains of upper Maastrichtian-Danian rocks of the Cauvery Basin, Southeastern India: Implications for provenance and depositional environments, Geosciences Journal, 2006; 10, 23-34

  49. Armstrong-Altrin, J.S., Madhavaraju, J., Ramasamy, S. and Gladwin Gnana Asir, N, 2005. Provenance and depositional history of sandstones from the upper Miocene Kudankulam Formation, Tamil Nadu, Journal of the Geological Society of India, 2005; 66, 59-65

  50. Madhavaraju, J., Kolosov, I., Bhulak, D., Armstrong-Altrin, J.S., Ramasamy, S. and Mohan, S.P, Carbon and oxygen isotopic signatures in Albian-Danian limestones of Cauvery Basin, Southeastern India, Gondwana Research, 2004; 7, 519-529

  51. Madhavaraju, J., Ramasamy, S., Mohan, S.P., Hussain, S.M., Gladwin Gnana Asir, N. and Stephen Pitchaimani, V, Petrography and surface textures on quartz grains of Nimar Sandstone, Bagh Beds, Madhya Pradesh - Implications on Provenance and Depositional Environments, Journal of the Geological Society of India, 2004; 64, 747-762

  52. Armstrong-Altrin, J.S., Surendra P. Verma, Madhavaraju, J., Yong Il Lee and Ramasamy, S., , Geochemistry of Late Miocene Kudankulam Limestones, South India. , International Geology Review, 2003; 45, 16-26

  53. Madhavaraju, J., Hansen, H.J., Ramasamy, S., Mohan, S.P., , Magnetic usceptibility study of Late Maastrichtian sediments (Kallamedu Formation) of Ariyalur Group of Tiruchirapalli Cretaceous, Tamil Nadu. , Journal of the Geological Society of India, 2003; 61, 699-702

  54. Madhavaraju, J., Ramasamy, S., , Petrography and geochemistry of Late Maastrichtian - Early Paleocene sediments of Tiruchirapalli Cretaceous, Tamil Nadu - Paleoweathering and provenance implications. , Journal of the Geological Society of India, 2002; 59, 133-142

  55. Madhavaraju, J., Ramasamy, S., Alastair Ruffell and Mohan, S.P., , 2002. Clay mineralogy of the Late Cretaceous and Early Tertiary successions of the Cauvery Basin (southeastern India): Implication for sediment source and Palaeoclimates at the K/T boundary. , Cretaceous Research, 2002; 23, 153-163

  56. Madhavaraju, J., Ramasamy, S., Mohan, S.P. and Gladwin Gnana Asir, N., , Ooids in Sillakkudi Formation of Ariyalur Group of Tiruchirapalli Cretaceous, Tamil Nadu: Implications for origin and depositional environment. Journal of the Geological Society of India, v.60, pp.317-322., Journal of the Geological Society of India, 2002; 60, 317-322

  57. Madhavaraju, J. and Ramasamy, S., , Clay mineral assemblages and rare earth element distribution in the sediments of Ariyalur Group, Tiruchirapalli District, Tamil Nadu - Implication for Paleoclimate. , Journal of the Geological Society of India, 2001; 58, 69-77

  58. Ramasamy, S., Madhavaraju, J., Armstrong Altrin Sam, J., , 2000. Dropstones in Talchir sediments of Palar Basin, Tamil Nadu – Implications on depositional conditions and paleoclimate. , Journal of the Geological Society of India, 2000; 56, 47-52

  59. Ramasamy, S., Madhavaraju, J., Armstrong Altrin Sam, J., , Dropstones in Talchir Sediments of Palar Basin, Tamil Nadu - Implications on depositional conditions and palaeoclimate- Reply” Journal of the Geological Society of India, v. 56, pp.680-681., Journal of the Geological Society of India, 2000; 56, 680-681

  60. Madhavaraju, J. and Ramasamy, S., , On the origin and occurrence of clay minerals in the Ariyalur Group of sediments, Cauvery Basin, Tamil Nadu, India. , Journal of the Nepal Geological Society, 1999; 19, 41-48

  61. Madhavaraju, J., Ramasamy, S., , 1999. Rare earth elements in limestones of Kallankurichchi Formation of Ariyalur Group, Tiruchirapalli Cretaceous, Tamil Nadu. , v.54, pp.291-301., Journal of the Geological Society of India, 1999; 54, 291-301

  62. Madhavaraju, J., Ramasamy, S., 1999., Microtextures on quartz grains of Campanian – Maastrichtian sediments of Tiruchirapalli District, Tamil Nadu – Implication on depositional environments. 647-658., Journal of the Geological Society of India, 1999; 54, 647-658

  63. Ramasamy, S., Alex Johnson Paul, B. and Madhavaraju, J., , Stratigraphy, petrography and sedimentation history of Kudankulam Formation along the south Tamil Nadu Coast, India. , Bulletin of Pure and Applied Sciences, 1994; 13F(1&2), 43-58

  64. Ramasamy, S., Madhavaraju, J., , Petrographic studies of the Bagh Beds along the Narmada Valley in Madhya Pradesh, India., Gondwana Geological Magazine, 1992; 4&5, 65-79