About Me

I spent over three and half decades conducting geological research on Himalayas. I started as mapping geologist in early 1980s and then spent several years  on  conducting research on magnetostratigraphy, geomorphology and thermochronology of Himalayan region in Nepal. Since past 15 years I am heavily engaged on GIS based geological mapping, and GIS based geomorphological and topographical database development for Nepal part  of Himalayas. I work

as a Consulting Geologist & Geo-disaster Risk Analyst, Geo- Information Specialist for Natural Resource, Geo-hazard Management.

Text Box: List of  my publications   on Himalayan Geology:

Ojha, T., DeCelles, P., 2015. Spatial coupling among landslides and geological structures in the Himalaya of far west Nepal, submitted to journal of Computer and Geosciences, (Springer publication). Under review.

West, A. J., Arnold, M., Aumaître, G., Bourlès, D. L., Keddadouche, K., Bickle, M. and Ojha, T. 2015. High natural erosion rates are the backdrop for present-day soil erosion in the agricultural Middle Hills of Nepal. Earth Surf. Dynam., 3, 363–387, 2015 www.earth-surf-dynam.net/3/363/2015/ doi:10.5194/esurf-3-363-2015.

Hirschmiller, J., Grujic, D., Bookhagen, B., Coutand, I., Huyghe, P., Mugnier, J. L., & Ojha, T. 2014. What controls the growth of the Himalayan foreland fold-and-thrust belt? Geology, 42(3), 247-250.

Lisa, S. Walsh, Aaron J. Martin, Tank P. Ojha, and Tom Fedenczuk 2012. Correlations of fluvial knickzones with landslide dams, lithologic contacts, and faults in the southwestern Annapurna Range, central Nepalese Himalaya: JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 117, F01012, doi: 10.1029/2011JF001984, 2012

Ojha T. P., Butler R. F., DeCelles P. G., Quade J. 2009 Magnetic polarity stratigraphy of the Neogene foreland basin deposits of Nepal BasinResearch (2009) 21, 61–90, doi: 10.1111/j.1365-2117.2008.00374.x 
Gehrels, G. E., DeCelles, P. G., Ojha, T. P., Upreti, B. N., 2006 Geologic and U-Pb geochronologic evidence for early Paleozoic tectonism in the Kathmandu thrust sheet, Central Nepal Himalaya: GSA bulletin; v. 118; no. 1/2; p. 1985-198.
Ojha, Tank, P., Butler, Robert, F., Quade, Jay, and DeCelles, G., Peter, 2004.Magnetic polarity stratigraphy of Siwalik Group sediments in Nepal: Diachronous lithostratigraphy and isochronous carbon isotope shift. HIMALAYAN JOURNAL OF SCIENCES VOL 2 ISSUE 4 (SPECIAL ISSUE) JULY 2004

Gabet, Emmanuel J, Burbank, Douglas W., Putkonen,  Jaakko K., Pratt-Sitaula, Beth A. and Ojha, Tank, 2004, Rainfall thresholds for landsliding in the Himalayas of Nepal
Geomorphology, 63 (2004) 131-143
Pratt-Sitaula, Beth, Burbanka, Douglas, W., Heimsath, Arjun, Ojha,Tank, 2004 Landscape disequilibrium on 1000–10,000 year scales, Marsyandi River, Nepal, central Himalaya. Geomorphology, 58 (2004) 223–241.
Burbank.,D. W., Blythe, A. E., Putkonen, J., B. Pratt-Sitaula, Gabet, E.,  Oskin, M., Barros,  A., & Ojha, T. P., 2003, Decoupling of erosion and precipitation in the Himalayas. Nature, vol., 426, p 652-655.
Gehrels, G. E., DeCelles, P. G., Martin, A., Ojha, T. P., 2003. Initiation of the Himalayan Orogen as an Early Paleozoic Thin-skinned Thrust Belt. Geology; v. 13; no. 9; p.04–09
Gezione, N., Carmala, DeCelles, G., Peter, Hodkinson, Damian, G., Ojha, Tank, P., Upreti, Bishal 2003, N., East-west extension and Miocene environmental change in the southern Tibetan plateau: Thakkhola graben, central Nepal. Geological Society of America Bulletin, v. 115 n.1 p. 03-20.
Pratt, Beth, Burbank, Douglas, W., Heimsath, Arjun, Ojha, Tank, 2002,  Impulsive alluviation during early Holocene strengthened monsoons, central Nepal Himalaya. Geology; v. 30; no. 10; p. 911–914.
Dettman, David, L., Kohn, Matthew, J.,  Quade, J., Ryerson, F. J., Ojha, T. P., Hamidullah, S., 2001, Seasonal stable isotope evidence for a strong Asian monsoon throughout the past 10.7 m. y. Geological Society of America Bulletin, v. 29, n.1 p. 31-34.
DeCelles, P. G., Robinson, D., M., Quade, J., Ojha, T. P., Garzione, C. N., Copeland, P., Upreti, B., N., 2001, Stratigraphy, structure, and tectonic evolution of the Himalayan fold-thrust belt in  Western Nepal. Tectonics, vol., 20, no. 4, p 487-509.
Ojha, T. P., Butler, R. F., Quade, J., DeCelles, P. G., Richards, D., Upreti, B. N., 2000, Magnetic polarity stratigraphy of Siwalik Group sediments of Khutia Khola Kailali, farwesterrn Nepal. Geological Society of America Bulletin, v. 112 p. 424-434.
Hoorn, Carina, Ojha, T. P., Quade, J.,  2000, Palynological evidence for vegetation development and climatic change in the Sub-Himalayan Zone (Neogene, Central Nepal) ELSEVIER, palaeogeography,  palaeoclimatology, palaeoecology v. 163, p. 133-161.
DeCelles, P. G., Gehrels, G.E., Quade, J., Ojha, T. P., 1998, Eocene-Early Miocene Foreland Basin Development and the history of Himalayan thrusting, Far Western and central Nepal. Tectonics, vol., 17, no. 5, p 741-765.
DeCelles, P. G., Gehrels, G.E., Quade, J., Ojha, T. P., Kapp, P. A., and Upreti, B.N., 1997, Neogene foreland basin deposits, erosional unroofing, and the kinametic history of the Himalayan fold-thrust belt, western Nepal: Geological Society of America Bulletin, v. 110, p. 2-21.
Quade, J., Cater, J. M. L.,  Ojha, T. P., Adam, J., and Harrison, T. M., 1995,  Late Miocene environmental change in Nepal and the northern Indian subcontinent: Stable isotopic evidence from paleosols: Geological Society of America  Bulletin, v. 107, p. 1381-1397.
Quade, J., Roe, L., DeCelles, P. G., and Ojha, T. P., 1997, Neogen 87Sr/86Sr record of lowland Himalayan rivers determined by carbonate, not silicate weathering: Science,  v. 276, p. 1828-1831.
Schelling, D., Cater, J., Seago, R., and Ojha, T. P., 1991, A balanced cross-section across the central Nepal Siwalik Hills: Hetauda to Amlekhganj: Journal of the Faculty of Science, Hokkaido University, Series IV, v.23, p. 1-9.
Harrison, T. M., Copeland, P., Hall S. A., Quade, J., Burner, S., Ojha, T. P., Kidd, W. S. F., 1993,. Isotopic preservation of Himalayan/ Tibet uplift, denudation, and climatic Histories of two molasse deposits: The Journal of Geology, v.100, p.157-173.
Text Box: For detailed information please contact
Dr. Tank Ojha
Email: tank.ojha@cox.net
Text Box: Weird Spatial Relationships among People, Climate, Topography, and Geology in the Himalayan Region of Nepal

Tank Ojha, Ph. D. , Adjunct Professor
Department of Geoscience, University of Arizona, USA 
Consulting Geologist & Geo-disaster Risk Analyst, Geo-Information Specialist for Natural Resource Management  (Email: tank.ojha@cox.net, ojha@email.arizona.edu )