Results 121 to 130 of about 192 (181)

The Internal Ice Content of Timpanogos Rock Glacier, Utah, USA From 3‐D Bayesian Inversion of Gravity Data

Journal of Geophysical Research: Earth Surface, Volume 131, Issue 8, August 2026.
Abstract Despite the prevalence of rock glaciers in mountain environments, their ice volumes are poorly constrained. Rock glaciers persist in settings unable to support glaciers. They act as climate resilient water stores and refugia for cold‐adapted species while also posing a hazard to alpine communities. Imaging the entire internal structure of rock
Bronson Cvijanovich, Michael S. Thorne, Surya Pachhai, Leif S. Anderson, Ivan Tochimani‐Hernandez, Christian L. Hardwick, Tonie van Dam   +6 more
wiley   +1 more source

Late Cenozoic Convergence Between the Pamir and the Tianshan Revealed by Low‐Temperature Thermochronology

Tectonics, Volume 45, Issue 8, August 2026.
Abstract The Cenozoic India–Eurasia collision drove widespread deformation across Central Asia, culminating in northward indentation of the Pamir and its eventual contact with the South Tianshan. However, the timing and kinematics of Pamir–Tianshan convergence, as well as its influence on regional topography and climate, remain debated. Here, we report
Fujun Wang, Edward R. Sobel, Peter van der Beek, Cody L. Colleps, Jessica A. Stammeier, Johannes Glodny, Wenbin Zhu   +6 more
wiley   +1 more source

Exhumation History of the Sangre de Cristo Range, Colorado, From Mid‐ to Low‐Temperature Thermochronology: New Insights Into Laramide Contraction and Oligocene–Miocene Extension in the Northern Rio Grande Rift, USA

Tectonics, Volume 45, Issue 8, August 2026.
Abstract The Sangre de Cristo Range in southern Colorado records a complex tectonic history that includes Late Cretaceous–Eocene Laramide contraction and Oligocene–Quaternary Rio Grande rift extension. We present new thermochronologic data (40Ar/39Ar, fission‐track, (U‐Th)/He) and thermal history models that provide insight into this polyphase history ...
John Singleton, Samantha Malavarca, Alexis K. Ault, Omar Ghamedi, M. Cole Sitar, Paul O’Sullivan, Martin Wong, Jonathan Saul Caine, James Metcalf, Dylan Frawley, Jeffrey M. Rahl   +10 more
wiley   +1 more source

Deep Seismic Reflection and Refraction Profiling

, 2011
openaire   +4 more sources

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Effects of Attenuation on Seismic Reflections

IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium, 2019
Seismic reflections at an interface are often regarded as the variation of the acoustic impedance (product of seismic velocity and density) in a media. In fact, they can also be generated due to the difference in absorption of the seismic energy. In this work, we investigate the impacts of attenuation on seismic reflections based on the diffusive ...
Haixia Zhao, Jingrui Luo, Yijie Zhang, Xiaokai Wang   +3 more
openaire   +1 more source

Pitfalls In Shallow Seismic Reflection

7th EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems, 1994
Substantial progress has occurred during the past 15 years in development of shallow CDP seismic-reflection techniques, but there are occasional interpretation problems with the resulting data. We discuss examples of the pitfalls of the method, along with some procedures to help avoid them.
Don W. Steeples, Richard D. Miller
openaire   +1 more source

Seismic reflectivity attributes

SEG Technical Program Expanded Abstracts 2015, 2015
Seismic structural attributes (e.g., curvatures and similarity), which are usually extracted from post-stack seismic data, have been been widely used to help seismic interpretation. Because seismic data is band limited and contaminated with noise, which results in low resolution of the extracted attribute outputs.
Rui Zhang, Bo Zhang
openaire   +1 more source

electromagnetic reflection seismics

2014
exaly   +2 more sources

Seismic Reflection Data

Chinese Journal of Geophysics, 2007
AbstractA layer‐by‐layer waveform inversion method is developed to derive the velocities of a multi‐layered model. Firstly, one new concept, medium perturbation‐response, is introduced and the gradient method for waveform inversion is analysed. Essentially, waveform inversion is to extract residual structural information between the real earth and ...
openaire   +1 more source

Seismic Reflection Principles—Basics

2016
Seismic reflection events are caused by the impedance contrasts at layer interfaces having a minimum width (Fresnel Zone). Seismic studies to represent reliably the subsurface geology, require quality data, which depend on signal-to-noise ratio and resolution, the latter being the ability to image thin geologic features separately.
openaire   +1 more source