A350/0114 Rights Managed
530 pixels on longest edge, watermarked
Request/Download high-res file
Uncompressed file size: 58.1MB
Downloadable file size: 5.0MB
This image is part of the feature Simple As Sand
Credit: SAM OGDEN/SCIENCE PHOTO LIBRARY
Caption: Grain separation. Experiment showing how different grains in a mixture separate into layers, an effect seen during the formation of sedimentary rocks such as sandstone. A mixture of sand & coloured sugar (red) is poured between 2 vertical sheets of glass. The mixture forms a mound whose sides periodically reach a critical angle, causing an avalanche. The smooth grains of sand stop short of the kink at the bottom of the heap, whilst the bigger, rougher sugar grains go a little further. As more grains fall the kink rides upward, forming 2 layers. Each succeeding avalanche makes another pair of layers. This experiment was devised by Hernan Makse of Boston University, USA, in 1997.
Release details: Model release not required. Property release not required.
Keywords: effects, experiment, experimnt, formation, geology, grain, grain separation, layer, layering, layers, physical effect, physics, rock formation, sand and sugar, sandstone, sandstone formation, sedimentary rock, separate, separation, strata, sugar and sand
High-resolution files: Approved customers can download high-resolution files directly from the site. A licence fee will be charged for the images used in your project.
