A5049119836- Geology and Paleoclimatology Research
- earthquake and tectonic studies
- Geological formations and processes
- Cryospheric studies and observations
- Methane Hydrates and Related Phenomena
- Landslides and related hazards
- Archaeology and ancient environmental studies
- Luminescence Properties of Advanced Materials
- Climate change and permafrost
- Planetary Science and Exploration
- Pleistocene-Era Hominins and Archaeology
- Maritime and Coastal Archaeology
- Crystal Structures and Properties
- Hydrology and Sediment Transport Processes
- Radiation Detection and Scintillator Technologies
- Geological and Geochemical Analysis
- Nuclear Physics and Applications
- Seismic Waves and Analysis
- Aeolian processes and effects
- Arctic and Antarctic ice dynamics
- Seismology and Earthquake Studies
- Seismic Imaging and Inversion Techniques
- Radioactivity and Radon Measurements
- Lichen and fungal ecology
- Marine and environmental studies
Inter-University Accelerator Centre
2021-2025
North Carolina State University
2022
Justus-Liebig-Universität Gießen
2017-2021
University of Cincinnati
2011-2017
Physical Research Laboratory
2006-2016
The late Q uaternary glacial history of the N un‐ K un massif, located on boundary between G reater H imalaya and Z anskar range in northwestern I ndia, was reconstructed. On basis morphostratigraphy 10 Be dating landforms (moraines trimlines), five stages were recognized defined, namely: (i) A chambur stage dated to M arine O xygen sotope S tage 3 4 (38.7–62.7 ka); (ii) T ongul early part L ateglacial (16.7–17.4 (iii) mantick later (14.3 ka, 11.7–12.4 (iv) omp ittle ce ge; (v) anak stage,...
Electron paramagnetic resonance (EPR), electron-nuclear double (ENDOR), and thermoluminescence (TL) are used to characterize the primary electron hole trapping centers in a lithium tetraborate (Li2B4O7) crystal doped with Ag. Three defects, two holelike one electronlike, observed after exposure at room temperature 60 kV x-rays. The as-grown contains both interstitial Ag+ ions substituting for Li+ ions. During irradiation, substitutional (4d10) trap holes distinct Ag2+ (4d9) formed. These EPR...
Streamlined subglacial landforms that include drumlins in three study areas, the upper Chandra valley around Tal, Spiti Valley and middle Yunam of NW Himalaya India were mapped studied using geomorphic, sedimentological geochronological methods. These streamlined a variety morphological types, including: (i) half egg‐shaped forms; (ii) complex superimposed (iii) dome‐shaped (iv) inverse (v) flat‐topped symmetrical forms. Sedimentological data indicate deformational processes are responsible...
Abstract. Infrared radiofluorescence (IR-RF) is an alternative dating technique for potassium feldspar grains, offering a higher signal stability and based on simpler underlying mechanism than more common luminescence approaches. However, its accuracy when tested known-age samples has so far shown inconsistent results. In this study, we present refined assessment using that have previously produced unreliable IR-RF ages. Our approach incorporates two major methodological advancements...
The Holocene and late Pleistocene environmental history of the teri ('sandy waste' in local parlance) red sands southeast coastal Tamil Nadu was examined using remote sensing, stratigraphy, optically stimulated luminescence (OSL) dating. Geomorphological surveys enabled classification as, 1) inland fluvial teri, 2) 3) near-coastal dunes. sediments have higher clay silty-sand component than suggesting that these were deposited by process during a stronger winter monsoon around ≫ 15 ka. dunes...
Research Article| March 01, 2017 Accelerating slip rates on the Puente Hills blind thrust fault system beneath metropolitan Los Angeles, California, USA Kristian J. Bergen; Bergen 1Department of Earth and Planetary Sciences, Harvard University, Cambridge, Massachusetts 02138, Search for other works by this author on: GSW Google Scholar John H. Shaw; Shaw * *E-mail: shaw@eps.harvard.edu Lorraine A. Leon; Leon 2Department University Southern California 90089, †Current address: Chevron North...
Abstract Glacier shrinkage is a globally occurring phenomena. High-resolution change detection based on frequent mapping and monitoring of high-altitude glaciers necessary to precisely evaluate future water availability understand glacier evolution under different climatic scenarios in the Hindukush-Karakoram-Himalayan (HKH) region. This also holds true for Bhaga basin western Himalaya. study investigates lake changes basin, over last five decades satellite imagery including Corona KH4...
Big Bone Lick (BBL) in northern Kentucky, USA has been a critical geologic site the historical development of North American Quaternary vertebrate paleontology since 1700s. Sedimentology, geoarcheology, paleontology, accelerator mass spectrometry radiocarbon and optically stimulated luminescence dating, stable carbon nitrogen isotope analyses were undertaken to develop chronostratigraphy history erosion deposition for provide foundation understanding taphonomy, species extinction adaptation...
Identifying systematic errors that are introduced by the measurement equipment is a necessary prerequisite for reproducible measurements and reliable results. However, technical artefacts often remain unpublished. Here we report on sudden change of luminescence intensity observed while measuring IR-RF signals from K-feldspar extracts. The were carried out lexsyg research reader. A lateral movement sample carrier up to 0.5mm relative photomultiplier tube irradiation source, causes in...
This study investigates elevation change (dh) and geodetic mass budget of glaciers in the Jankar Chhu Watershed (JCW), Lahaul Himalaya, India, based on difference ASTER DEMs during 2002–2018. Glacier-wide spatially heterogeneous dh patterns were evaluated context morphological topographical settings. During 2002–2018, show a mean annual rate (dh/dt) −0.38 ± 0.10 m a−1, resulting specific −0.32 0.09 w.e.a−1, close to previously reported estimates western Himalaya. Nearly stagnant thick...