Results 61 to 70 of about 99,827 (373)
Simulating regoliths in microgravity [PDF]
, 2013 Despite their very low surface gravities, the surfaces of asteroids and comets are covered by granular materials - regolith - that can range from a fine dust to a gravel-like structure of varying depths. Understanding the dynamics of granular materials is, therefore, vital for the interpretation of the surface geology of these small bodies and is also ...
arxiv +1 more source
Journal of Structural Geology, Elsevier, 2018, 114, pp.163 - 195, 2018 Stylolites are ubiquitous geo-patterns observed in rocks in the upper crust, from geological reservoirs in sedimentary rocks to deformation zones, in folds, faults, and shear zones. These rough surfaces play a major role in the dissolution of rocks around stressed contacts, the transport of dissolved material and the precipitation in surrounding pores.
arxiv +1 more source
Minerals in Afghanistan : the potential for copper [PDF]
, 2006 There are around 300 documented copper deposits, occurrences and showings in Afghanistan as shown in Figure 1. A variety of styles of copper mineralisation occur in rocks ranging in age from Proterozoic to Neogene.
Benham, Antony John, Coats, Stan
core
Emplacement of sandstone intrusions during contractional tectonics [PDF]
, 2016 Acknowledgments We acknowledge the support of sponsoring companies of Phase 3 of the Sand Injection Research Group (SIRG). We are very grateful to John Waldron and Jessica Ross for the constructive reviews of the manuscript.
Alsop, G. Ian +4 more
core +1 more source
π–π Conjugated Bonds Stacking/Scattering for Switchable Lubrication in Supramolecular Hydrogel
Advanced Science, EarlyView.Inspired by the hagfish′s behavior of secreting mucus to escape from predators, a dual‐responsive intelligent lubricating material (PPRA) is successfully prepared. When PPRA is heated or sheared, a partial gel‐sol transition occurs in the hydrogel, resulting in a sol‐state RPAD layer forming on the surface, which acts as a lubricating layer and reduces
Shuhang Deng +14 more
wiley +1 more source
Characterization of a complex near-surface structure using well logging and passive seismic measurements [PDF]
Solid Earth, 2016 We combine geophysical well logging and passive seismic measurements to characterize the near-surface geology of an area located in Hontomin, Burgos (Spain). This area has some near-surface challenges for a geophysical study.
B. Benjumea +3 more
doaj +1 more source
Semi-Automated Segmentation of Geoscientific Data Using Superpixels [PDF]
arXiv, 2023 Geological processes determine the distribution of resources such as critical minerals, water, and geothermal energy. However, direct observation of geology is often prevented by surface cover such as overburden or vegetation. In such cases, remote and in-situ surveys are frequently conducted to collect physical measurements of the earth indicative of ...
arxiv
The Anatomical Record, EarlyView.Abstract Saber‐tooths, extinct apex predators with long and blade‐like upper canines, have appeared iteratively at least five times in the evolutionary history of vertebrates. Although saber‐tooths exhibit a relatively diverse range of morphologies, it is widely accepted that all killed their prey using the same predatory behavior. In this study, we CT‐
Borja Figueirido +2 more
wiley +1 more source
Morphological diversity of saber‐tooth upper canines and its functional implications
The Anatomical Record, EarlyView.Abstract Elongated upper canine teeth, commonly known as saber‐teeth, have evolved three times within the sub‐order Feliformia. The species that wielded them flourished throughout the Cenozoic and have historically been separated into two morphological groups: the dirk‐tooths with longer, flatter canines, and the scimitar‐tooths with shorter, serrated ...
Caitlin D. Shelbourne +1 more
wiley +1 more source
Density vs distance for the DUNE beam from two recent geology density maps [PDF]
Phys. Rev. D 95, 113004 (2017), 2016 The densities passed through for neutrinos going from Fermilab to Sanford lab are obtained using two recent density tables, crustal [1] and Shen-Ritzwoller[2], as well as the values from an older table PEMC[3].
arxiv +1 more source