The Bagnold linear dune field investigated by Curiosity at Mount Desert Island (MDI) is north of the ?5.5 km high Aeolis Mons mound in Gale crater. False-color images (RGB: 2.496, 1.802, and 1.237 ?m, respectively) generated from Mars Reconnaissance Orbiter Compact Imaging Spectrometer for (CRISM) data show has a reddish-brown color. Sands Forvie (SoF), located ?2.5 to southeast MDI, darker lac...

We carry out constant volume simulations of steady-state shear-driven rheology in a simple model of bidisperse soft-core frictionless disks in two dimensions, using a dissipation law that gives rise to Bagnoldian rheology. We discuss in detail the critical scaling ansatz for the shear-driven jamming transition and carry out a detailed scaling analysis of our resulting data for pressure p and sh...

Marine sediment deposits near the Qiongzhou Strait have great potential as sources for beach nourishment and infrastructure industry aggregates. Estimation of bedload transport during spring tide improves understanding movement characteristic under dynamic conditions, which would further favor assessment mining marine sand resources. To study at eastern entrance Strait, surficial distributions ...

The Mars Science Laboratory rover Curiosity visited two active wind-blown sand dunes within Gale crater, Mars, which provided the first ground-based opportunity to compare Martian and terrestrial eolian dune sedimentary processes and study a modern analog for the Martian eolian rock record. Orbital and rover images of these dunes reveal terrestrial-like and uniquely Martian processes. The prese...

[1] Recently, models for the onshore migration of nearshore sandbars were improved by including an empirical acceleration term in the sediment transport formulation (Hoefel and Elgar, 2003). Here, field observations of the fluid-sediment interface suggest that the success of this empirical parameter may result from unsteady forcing of sediment beds by nearshore waves. The velocity and sediment ...

________________________________________________________5 INTRODUCTION_____________________________________________________5 RHEOLOGICAL MODELS________________________________________________9 Bagnold's Original Models for Grain Flows_______________________________ 9 Takahashi and Chen Models for Debris Flow and Debris Avalanche _______________ 10 McTigue, Savage, Goodman and Cowin Models for D...

MOUNT SHARP. M.G.A. Lapotre, B.L. Ehlmann, F. Ayoub, S.E. Minson, N.T. Bridges, A.A. Fraeman, R.E. Arvidson, J.L. Eigenbrode, R.C. Ewing, J.R. Johnson. California Institute of Technology, Pasadena, CA, USA. Jet Propulsion Laboratory, Pasadena, CA, USA. USGS, Menlo Park, CA, USA. John Hopkins University, Laurel, MD, USA. Washington University in St. Louis, MO, USA. NASA/GSFC, Greenbelt, MD, USA....