By: GeneCooper
Image: Gene Cooper, GIGAmacro
⧉
Subject:
Placer Gold Design
⧉
License:
Copyright, All Rights Reserved
Uploaded: 31 Oct 2017
Last Updated: 31 Oct 2017
139 megapixels
13,687 x 10,183 pixels
45.6 in X 33.9 in at 300dpi
29,260 pixels per inch
Made using 1,176 photos
6 rows |
4 columns |
49 stacks
Placer mining is frequently used for precious metal deposits (particularly gold) and gemstones, both of which are often found in alluvial deposits—deposits of sand and gravel in modern or ancient stream beds, or occasionally glacial deposits. The metal or gemstones, having been moved by stream flow from an original source such as a vein, are typically only a minuscule portion of the total deposit. Since gems and heavy metals like gold are considerably more dense than sand, they tend to accumulate at the base of placer deposits. [Source: Wikipedia]