Two and half months (August – October, 2001)
Six weeks (Sept. –Oct., 2008)
Two days (October, 2008)
Three weeks (September, 2012)
Worked and coordinated palynological and biostratigraphical studies on different Tertiary basins of India.
Made critical taxonomic assessment on Indian Tertiary tricolporate and monocolpate pollen.
Carried out monographic work on Indian Fossil fungi along with their taxonomic reallocation.
Carried out studies on highly specialized area, the biopolymer organization under International Collaboration at Botany Department, Szeged University, Hungary.
Carried out palynological and palynofacies studies under DST sponsored project ‘Environment of deposition and biosrtatigraphy of Early Tertiary lignites of Rajasthan and adjoining areas’.
Carried out palynological, and biopetrological works on early Tertiary lignite and associated sediments from Gujarat under intra-institutional collaboration.
Carried out palynological, geochemical and biopetrological works under collaboration with IIT, Bombay.
Carried out detailed work on taxonomic aspects of Indian Fossil Fungi.
Renovation and addition of displays/ panels in the Museum of BSIP.
Wrote a book containing varied aspects of Geology and Environmental Science in Hindi language.
A brief account of these works is as follows:
I. Palynological, biostratigraphical and Palaeoenvironmental studies: A. Meghalaya Basin and Arunachal Himalayas: Lithostratigraphy and biostratigraphic works based on palynological studies on Palaeocene–Eocene sediments exposed in Jaintia Hills, East Garo Hills and West Garo Hills, Meghalaya were done. Palynofossils from the Tertiary deposits of Kameng, Subansiri and Siang districts, Arunanchal Pradesh were studied. These investigations confirmed the presence of Late Eocene deposits in Eastern Himalayas. B. Siwalik sediments of Jammu and Kashmir: Palynological and sedimentological studies from Lower and middle Siwalik sediments exposed near Nandni in Jammu were carried out with a view to determine the vegetation and climate of the area at the time of deposition.
C. Andaman and Nicobar Basin: Three road sections of Middle Andaman viz., Chainpur, Kalunala and Lipak were investigated palynologically. Several levels of these sections proved productive yielding terrestrial palynofossils and dinoflagellate cysts of Late Cretaceous and late Eocene-Oligocene ages. Reworked Triassic palynofossils were also recorded.
D. Rajasthan Basin: Early Palaeogene sediments from bore-holes and poen-cast lignite mines located at different sites at Barmer and Nagaur were investigated. Studies under this project generated significant information about the vegetation history, biostratigraphy and palaeoenvironment.
E. Gujarat Basin: Palynological studies were taken up on Early Palaeogene sediments of Vastan lignite mine, Mangrole lignite mine, Surat and Matanomadh lignite mine, Kutch.
II. WORK ON THE MONOGRAPH
Title of Monograph – “Indian fossil fungi”
Authors - Dr. R.K. Saxena & S.K.M. Tripathi
Critical taxonomic evaluation of fossil fungal remains from India was done. These studies were aimed at streamlining the prevailing taxonomic chaos in fossil fungal remains. All fossil fungal taxa known till 2010 were described along with their text figures, taxonomic details and occurrences in India.
III. WORK ON THE BOOK: Title of the book – “Seven Decades of Indian Tertiary Spore-Pollen Floras: A compendium” Authors - Dr. R.K. Saxena & S.K.M. Tripathi
Day-by-day it was getting difficult and impractical to keep the track of published papers related with Tertiary palynology (spore/pollen assemblages) and their applications. Therefore, the need to assemble and collate the contents of these publications at one place was felt since long. The book provides an abridged version of all till-date publications pertaining to palynology from Indian sediments along with the Key-words marking the theme of each contribution.
IV. Work under Sponsored Project:
Work under a DST sponsored project “Environment of deposition and biosrtatigraphy of Early Tertiary lignites of Rajasthan and adjoining areas” was completed (January, 2005 to June, 2008). Under this project Palynological as well as palynofacies studies on samples representing the Akli Formation of Barmer, Rajasthan, and Cambay Shale of Vastan lignite mine, Surat, Gujarat were conducted.
V. Studies under International collaboration:
Joint research programmes were undertaken with a celebrated palynologist Professor Mklos Kedvs of Plant Cell Biology Unit, Szeged University, Szeged, Hungary. These research programmes were conducted under the Exchange of Scientists Programme between INSA, New Delhi and Hungarian Academy of Sciences, Budapest.
Highlights of the works under this programme are as follows:
1. Studies on biopolymer symmetry:
TEM studies were made on partially dissolved fossil and extant pollen walls and cuticles with an object to observe the relationship between quasi-crystalloid and quasi-periodic structures. An analogy in structural symmetries between biomolecules of sporopollenin and cutine were observed. Sporopollenin is a substance, which forms a coating on the walls of spores and pollen grains whereas, cutine is the coating surface present on different parts of plants. These substances are quite resistant to destruction or oxidation, a characteristic associated with the arrangement of molecules within the stable and meta-stable structures. Studies have suggested common origin of these resistant plant substances. Results of these studies were published in Hungarian journal.
2. Effect of temperature and organic solvents on pollen morphology:
Pollen grains of twenty Indian Palm species were investigated to observe the effect of temperature on their morphological features. Pollen grains were subjected to 2000C for 1, 25 and 100 hour(s). As a result to this treatment darkening of colour, increase in exine thickness and change in equatorial and polar diameter in pollen were noticed. These experimental studies have proved very helpful in elucidating the post-burial history of organic particles and have also provided trails for the taxonomic assessment of monocolpate pollen abundantly occurring in Tertiary sequences of India.
Original Research Papers:
Saxena, R.K. and Tripathi, S.K.M. 1982. Lithostratigraphy of the Tertiary sediments exposed along Jowai-Badarpur Road in Jaintia Hills (Meghalaya) and Cachar (Assam). Palaeobotanist 30(1): 34-42.
Singh, H.P. and Tripathi, S.K.M. 1983. A comparative study of the spores of Ceratopteris thalictroides (L.) Brongn. and Striatriletes van der Hammen emend. Kar. Geophytology 13(2): 219-226.
Tripathi, S.K.M. and Singh, H.P. 1984a. Two new pollen genera from the Lower Tertiary sediments of Meghalaya. Palaeobotanist 32(2): 153-157.
Tripathi, S.K.M. and Singh, H.P. 1984b. Palynostratigraphical zonation and correlation of the Jowai-Sonapur Road Section (Palaeocene-Eocene), Meghalaya, India. pp. 316-328 In Tiwari, R.S. et al. (Editors)- Proceedings of 5th Indian Geophytological Conference, Lucknow, 1983. Special Publication Palaeobotanical Society, Lucknow.
Tripathi, S.K.M. and Singh, H.P. 1985. Palynology of the Jaintia Group (Palaeocene-Eocene) exposed along Jowai-Sonapur Road, Meghalaya, India-Part I. Systematic palynology. Geophytology 15(2): 164-187.
Singh, H.P. and Tripathi, S.K.M. 1986. Observations on some Tertiary zonisulcate pollen grains. Palaeobotanist 35(1): 48-52.
Singh, H.P. and Tripathi, S.K.M. 1987. Palynology of the Jaintia Group (Palaeocene-Eocene) exposed along Jowai-Sonapur Road, Meghalaya, India (Part II). Data analysis and interpretation. Palaeobotanist 35(3): 301-313.
Tripathi, S.K.M. 1988. Age of the Therria Formation, Meghalaya India - a review. Geophytology 18(1): 121-123.
Singh, T. and Tripathi, S.K.M. 1990. Siwalik sediments of Arunachal Himalaya: Palynology, palaeoecology and palaeogeography. Palaeobotanist 38: 325-332.
Tripathi, S.K.M. and Singh, T. 1992. Record of Early Tertiary palynotaxa from Siang District, Arunachal Pradesh, India. Palaeobotanist 39(2): 149-154.
Tripathi, S.K.M. 1994. New angiosperm pollen from subsurface Early Palaeogene sediments of Barmer District, Rajasthan, India. Palaeobotanist 42(1): 61-65.
Tripathi, S.K.M. 1995. Palynology of subsurface Palaeogene sediments near Kapurdi, Barmer District Rajasthan, India. Palaeobotanist 43(1): 45-53.
Saxena, R.K., Tripathi, S.K.M. & Vandana Prasad. 1996. Palynological investigation of the Tura Formation (Palaeocene) in Nongwal-Bibra area, East Garo Hills, Meghalaya. Geophytology 26(1): 19-31.
Venkatachala, B.S., Saxena, R.K., Singh, H.P., Kar, R.K., Tripathi, S.K.M., Kumar, M., Sarkar, S., Mandal, J.P., Rao, M.R., Singh, R.S., Mandaokar, B.D. & Ambwani, K. 1996. Indian Tertiary Angiosperm pollen: A critical assessment. Palaeobotanist. 42(2): 106-138.
Tripathi, S.K.M. 1997. Palynological changes across subsurface Palaeocene-Eocene sediments near Barmer, Rajasthan, India. Palaeobotanist 46:168-171.
Kedves, M., Tripathi, S.K.M., Ver, A., Pardutz, A. & Rojik, I. 1998. Experimental studies on Botryococcus colonies from Hungarian Upper Tertiay Oil Shales. Plant Cell Biology and Development 9: 43-63.
Saxena, R.K. & Tripathi, S.K.M. 1999. Retitribrevicolporitesis synonym of Tricolporopollis (Tertiary pollen from India). Taxon 48: 493-496.
Kedves, M., Barbola, A., Tripathi, S.K.M. & Madhav Kumar. 2000. Transmission electron microscopic studies on partially degraded pollen grains of Phoenix sylvestris Linn. Plant Cell Biology and Development 12: 93-103.
Kedves, M., Barbola, A., Tripathi, S.K.M. & Madhav Kumar. 2000. Thermal effect on some extant Palm pollen. Plant Cell Biology and Development 11: 166-183.
Tripathi, S.K.M., Saxena, R.K. & Vandana Prasad. 2000. Palynological investigation of Tura Formation (Early Eocene) exposed along Tura-Dalu Road, West Garo Hills, Meghalaya, India. Palaeobotanist. 49(2): 239-251.
Jafar, Syed A. & Tripathi, S.K.M. 2001. Significance of Late Triassic palynofossils from Andaman - Nicobar Islands. Modern Geology 24: 205-219.
Kedves, M., Horvath, A., Tripathi, S.K.M. & Madhav Kumar. 2001. Symmetry operations on the Quasi Crystalloid biopolymer system of the sporopollenin of Phoenix sylvestris Linn. From India. Plant Cell Biology and Development 13: 76-86.
Kedves, M., Priskin, K., Tripathi, S.K.M. & Madhav Kumar. 2002. Variations in LM morphology of partially degraded Palm pollen grains from India. Plant Cell Biology and Development 14: 75-84.
Tripathi, S.K.M., Madhav Kumar, Kedves, M. Varga, B. 2003. LM, SEM and TEM investigations on partially degraded pollen grains of Cycas rumphii from India. Plant Cell Biology and Development 15: 43-47.
Kedves, M. and Priskin, K., Tripathi, S.K.M. & Madhav Kumar. 2003. Biopolymer structure of the partially degraded cuticles of Cycas rumphii - A preliminary report. Plant Cell Biology and Development 15: 28-42.
Tripathi, S.K.M., Singh, U.K. & Sisodia, M.S. 2003. Palynological investigation and palaeoenvironmental interpretations on Akli Formation (Late Palaeocene), Barmer District, Rajasthan, India. Palaeobotanist. 52(1): 87-96.
Tripathi S.K.M., Madhav Kumar, Kedves, M. & Jacso, D. 2004. SEM Investigations on partially degraded pollen grains of family Malvaceae. Plant Cell Biology and Development. 16: 57-67.
Tripathi, S.K.M., Madhav Kumar & Kedves M. 2004. Advantages of the use of C60 fulleren/benzol solution in the ultrastructure investigation: A case study of of Cycas rumphii Miq. pollen grains. Curr. Sci. 87(6): 769-771.
Sahni, A, Rana, R.S., Loyal, R.S., Saraswati, P.K., Mathur, S.K., Rose, K.D., Tripathi, S.K.M. & Garg, R. 2004. Western margin Palaeocene-Lower Eocene lignites: biostratigraphic and palaeoecological constraints. 2nd APG Conference, Khajuraho, India: 1-18.
Tripathi, S.K.M., Mathur, S.C., Nama, S.L. & Srivastava, D. 2007. Palynological studies from Early Eocene sequence exposed near Matasukh, Nagaur District, western Rajasthan, India. In Trivedi P.C. (Editor) - Palaeobotany to Modern Botany: 49-56, Pointer Publishers, Jaipur, India.
Garg, R. Khowaja-Attequazzaman, Prasad, V., Tripathi, S.K.M., Singh, I.B., Jauhari, A.K. & Bajpai, S. 2008. Age diagnostic dinoflagellate cysts from the lignite bearing sediments of the Vastan lignite mine, Surat District, Gujarat, India. Journal of Palaeontological Society of India. 53 (1): 99-105.
Tripathi S.K.M., Kumar M. & Srivastava D. 2009. – Palynology of the lower Palaeogene (Thanetian -Ypresian) coastal deposits from Barmer Basin, western Rajasthan, India. Geologica Acta. 7 (1-2): 147-160.
Prasad, V., Farooqui, A., Tripathi, S.K.M., Garg, R., Thakur, B., 2009. Evidence of Late Palaeocene-Early Eocene equatorial rain forest refugia in southern Western Ghats, India. Journal of Biological Sciences 34: 777-797.
Dhanoria, S.K., Singh, K.N. & Tripathi, S.K.M. 2010. Petrochemical basis for the rank (Maturity) evaluation of Early Eocene lignite field of Rajpardi and Tadkeshwar area of South Gujarat. Diamond Jubilee National Seminar Volume: 124-128.
Dhanoria, S.K., Singh, K.N. & Tripathi, S.K.M. 2010. Source Rock potential for Hydrocarbon Generation in lignites of South Gujarat. Gondwana Geological Magzine, Special Volume 12: 245-250.
Tripathi, S.K.M. & Srivastava, D. 2010. Palynological investigations, facie analysis and palaeoenvironmental interpretations from late Palaeocene to early Eocene lignites and associated sediments of Barmer, western India. Palaeobotanist. 59: 1-32.
Hukam Singh. H. & Tripathi, S.K.M. 2010. Fungal remains from the Early Palaeogene subsurface sediments of Barakha, Barmer, Western Rajasthan, India, Geophytology. 39: 5-11.
Dutta, S. Runcie P. Mathews, Bhagwan D. Singh, B.D., Tripathi, S.K.M., Singh, A., Pratul K. Saraswati P.K., Banerjee S, Mann U. 2011. Petrology, Palynology and Organic Geochemistry of Matanomadh lignite, Kutch Basin, Western India: Implications to Palaeodeposition and Hydrocarbon Source Potential. International Journal of Coal Geology.85: 91-102.
Dutta, S., Tripathi, S.K.M., Mallick, M., Runcie P. Mathews, Paul, F. Greenwood, Rao, M.R. & Roger E. Summons. 2011. Eocene out-of-India dispersal of Asian Dipterocarps. Review of Palaeobotany and Palynology. 166:63-68.
Tripathi, S.K.M. & Divya Srivastava 2012. Palynology and Palynofacies of the Early Palaeogene lignite bearing succession of Vastan, Cambay Basin, Western India. Acta Palaeobotanica. 52(1): 157-175.
Runcie P. Mathews, Tripathi, S.K.M., Banerjee, S. & Dutta, S. In Press. Palynology, palaeoecology and palaeodepositional environment of Eocene lignites and associated sediments from Matanomadh mines, Kutch basin, Western India. Journal of Geological Society of India.
Singh, A., Mahesh, Hukam Singh, Tripathi, S.K.M. & Singh, B.D. 2012. Characterization of Mangrol Lignite (Gujarat), India – Petrology, palynology and palynofacies. In Press. International Journal of Coal Geology.
Saxena, R.K. & Tripathi, S.K.M. 2012. Seven Decades of Indian Tertiary spore-pollen flora: A Compendium. American Association of Stratigraphic Palynologists Contribution Series 45: 1-182.
Chapters contributed in Edited Books:
Tripathi, S.K.M. 1995. Techniques in palynological studies. pp. 35-49 In Tiwari, R.S. (Editor) - Coaliferous fuel resources of India: Parameters of studies in palynology and Biodiagenesis. Birbal Sahni Institute of Palaeobotany, Lucknow, India.
Tripathi SKM 2009. Fungi from palaeoenvironments: their role in environmental interpretations. In Misra, JK & Deshmukh S (eds.) Fungi from different environments: 1-27. Science Publishers Enfield, Hampshire, USA.
Tripathi, S.K.M. 2012. The systematics and evolutionary perspectives of fossil fungi. In Misra, JK & Deshmukh S (eds.) Evolution and Systematics in Fungi: 15-27.Science Publishers Enfield, Hampshire, USA.
Tripathi, S.K.M. In Press. Fungal genera from fossilized-leaf surfaces. In Misra, JK & Deshmukh S (eds.) The Substrate Fungi,Science Publishers Enfield, Hampshire, USA.
Tripathi, S.K.M. 2003. Collaborative studies between BSIP and Plant Cell Biology Unit, Szeged University, Szeged, Hungary. - A Status Report. BSIP Newsletter: 10-11.
Tripathi SKM 2006. Scientific collaboration with an eminent Hungarian Scientist – A Report. 25 Years of Collaboration between INSA & Hungarian Academy of Sciences – Compendium: 45-49.
Tripathi SKM 2007. Third Proficiency Course on modern practices in Petroleum Exploration: A report. Palaeobotanist 56: 155-156.
Tripathi SKM 2009. Environment of deposition and biosrtatigraphy of Early Tertiary lignites of Rajasthan and adjoining areas (SR/S4/ES-75/2003). Project Completion Report pp. 1-90.
Tripathi SKM 2009. Visit Under International Exchange of Scientists Programme: A Report. BSIP Newsletter12: 21.
Tripathi S.K.M., Mathur. S.C., Nama S.L., and Srivastava Divya. 2005. Palynological studies from Late Palaeocene sequence exposed near Matasukh-Kashnou area, Nagaur District,western Rajasthan, India, XX Indian colloquium on micropaleontology and Stratigraphy. Department of Geology Andhra University, Visakhapatnam. 117.
Tripathi S.K.M. 2005. Palaeobiology in Natural History Museums. Diamond Jubilee National Conference, Lucknow; 180-181.
Srivastava D & Tripathi S.K.M. 2006. Palynological and palaeoenvironmental implications in Early Palaeogene sequences of western Rajasthan, India with special reference to the Barmer Basin. 7th European Palaeobotany-Palynology conference, Prague, Czech Republic: 132.
Tripathi S.K.M., Srivastava Divya, 2006. Palaeoenvironmental significance of floral faunal assemblages from Early Palaeogene sequences of Western India, International conference on Climate and Biota of the Early Palaeogene.Bilbao, Spain, 139.
Tripathi S.K.M. & Srivastava D 2006. Characteristic palynofloral assemblages from Western Rajasthan. Diamond jubilee International conference on changing scenario in Palaeobotany & allied subjects, BSIP, Lucknow: 168.
Srivastava D & Tripathi S.K.M. 2006. Palynological study on the Early Eocene sequence of Vastan lignite mine, Gujarat, India. Diamond jubilee International conference on changing scenario in Palaeobotany & allied subjects, BSIP, Lucknow: 169.
Tripathi S.K.M. & Divya Srivastava 2008. - Palynological studies and palaeoenvironmental interpretations from Thanetian-Ypresian sequence of Vastan, Gujarat, Western India. Terra Nostra,IPC-12/IOPC-VIII, Bonn, Germany: 286.
Singh H., Divya Srivastava & Tripathi S.K.M. 2008. Palynological studies from Early Eocene sequence exposed near Matasukh, Nagaur District, western Rajasthan, India. Conference on Plant life through the ages, BSIP, Lucknow: 159-160.
Palynology and bulk Organic Geochemistry of early Palaeogene lignite bearing sequences of Vastan, Cambay Basin, Western India. 22nd Indian Colloquium on Micropaleontology and Stratigraphy, Department of Geology, National College, Tiruchirapalli, Tamil nadu: 123.
Tripathi, S.K.M. 2011. Palynology- an effective tool in biostratigraphy and palaeoecologic and palaeoclimatic interpretations: Case study from Barmar Basin, Rajasthan. National Conference: Stratigraphy, Palaeontology and Palaeoenvironment. 85-87.
Dutta, S., Tripathi, S.K.M., Mallick, M., Runcie P. Mathews, Paul, F. Greenwood, Rao, M.R. & Roger E. Summons. 2012. Origin and evolution of Asian Dipterocarps: Evidences from resin chemistry and palynological data. Japanese Journal of Palynology. 58: 52.
Singh, A., Mahesh, Hukam Singh, Tripathi, S.K.M., Singh, B.D. 2012. Characterization of Mangrol Lignite (Gujarat), India – Petrology, palynology and palynofacies. Sixty-fourth Annual Meeting of International Committee for Coal and Organic Petrology, China University of Mining and Technology, Beijing, China. 26-27.