Read e-book online A Grain of Sand: Nature's Secret Wonder PDF

By Gary Greenberg

ISBN-10: 1616739541

ISBN-13: 9781616739546

Here's the realm considered inside a grain of sand, because of the beautiful 3-dimensional microphotography of Dr. Gary Greenberg. to a couple, all sand seems to be alike--countless grains in an enormous expanse of seashore. glance closer--much closer--and your view of sand is simply not an analogous. utilizing the wonderful microphotographic concepts that he built, Greenberg invitations readers to find the unusual and lovely international that every grain of sand includes.

Here are the sands of Hawaii and Tahiti, the Sahara and the Poles, a volcano, every one exquisitely diversified, and every telling a desirable geological tale. crimson sand and yellow, white sand and black, making a song sand and quicksand: Greenbergs images demonstrate the delicate adjustments of their shades, textures, sizes, and shapes. And as this infinitesimal international unfolds so does an interesting clarification of the way each one grain of sand starts and varieties and reveals itself in a specific position, one among one thousand million and one-of-a-kind.

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Extra resources for A Grain of Sand: Nature's Secret Wonder

Sample text

Lava in Hawaii cools to form basalt rock, which erodes into grains of sand if exposed to the continual pounding of the surf. Wikimedia Commons 43 Granite in Yosemite National Park slowly solidified from hot magma beneath the Earth's surface. Uplift, along with the erosion of surrounding materials, exposed the granite rock. Wikimedia Commons A microscopic image of a slice ofrock shows that individual grains are separated by clear boundaries. As rock erodes, grains work free to become sand grains while others break down to silt- or clay-sized particles (magnification 8Sx).

Although I usually use fiber-optic light guides to illuminate the sand grains, I occasionally use transmitted illumination. Transmitted illumination is light that passes through the specimen that is then observed, as opposed to reflected illumination, which is light that is /Jounced df the specimen. I also employ crossed 34 polarizing filters when using transmitted light. Polarized, transmitted light penetrates some of the sand grains, creating a different view than traditional reflected light.

The image is compiled from a series of eight individual images taken side by side (magnification 35x). a grain that is outstanding, I carefully extract it from the pile using a very fine acupuncture needle. It can take hours to fully examine a thimbleful of sand. It feels like I'm mining for gold and jewels but on a very small scale. This is one of the innocent joys of nature that I get to experience every time I look at a new sample of sand from somewhere in the world. Once enough grains have been harvested, they are then laid out on a clean glass slide.

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A Grain of Sand: Nature's Secret Wonder by Gary Greenberg

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