By Gary Greenberg
This is the realm considered inside a grain of sand, because of the lovely three-d microphotography of Dr. Gary Greenberg. to a couple, all sand appears alike--countless grains in an unlimited expanse of seashore. glance closer--much closer--and your view of sand is not an analogous. making use of the glorious microphotographic concepts that he constructed, Greenberg invitations readers to find the unusual and beautiful global that every grain of sand includes.
Here are the sands of Hawaii and Tahiti, the Sahara and the Poles, a volcano, every one exquisitely varied, and every telling a desirable geological tale. crimson sand and yellow, white sand and black, making a song sand and quicksand: Greenbergs photos display the delicate ameliorations of their colours, textures, sizes, and shapes. And as this infinitesimal international unfolds so does an fascinating clarification of ways each one grain of sand starts off and kinds and reveals itself in a selected position, considered one of 1000000000 and one-of-a-kind.
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Extra resources for A Grain of Sand: Nature's Secret Wonder
A newly formed quartz grain has sharp edges, whereas a recycled quartz grain is rounded. Feldspar grains can also survive recycling but not as hardily, so sand that has been recycled a few times consists mostly of quartz. The erosion of sandstone creates a staggering view in places such as Sedona, Arizona, the gateway to the Grand Canyon. Hundreds of millions of years ago, long before the forces of nature gouged away the Grand Canyon, this entire region was situated at the northwestern edge of the United States.
Layer after layer, the sediment builds up over time. Thousands or even millions of years of compression cause the sediment to naturally cement together and form sedimentary rock. Sandstone, often used as a building material, forms from sediment that contains quartz. Limestone forms from sediment that contains a high proportion of biological matter. It is often made of calcium carbonate that originates from evaporated lakes and seabeds that contained biological materials such as shells, fossils, and coral fragments.
Shape (magnification 90x). This species offoram found on some Hawaiian beaches is normally white, but this one has fossilized into a unique orange-colored grain of sand (magnification 10Sx). 50 Coral reefs are a source of biological diversity and represent a major niche for ocean life throughout the world. A pair of coral fragments collected from a beach in Maui. Colorful grains of coral constitute much of the sand on tropical beaches (magnification 60x). habitat for a large variety of marine life, which is reflected in the bits and pieces that make their way to nearby beaches.