A Grain of Sand: Nature's Secret Wonder - download pdf or read online
By Gary Greenberg
This is the area considered inside a grain of sand, due to the lovely three-d 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 isn't a similar. using the glorious microphotographic concepts that he constructed, Greenberg invitations readers to find the unusual and lovely global that every grain of sand includes.
Here are the sands of Hawaii and Tahiti, the Sahara and the Poles, a volcano, each one exquisitely diversified, and every telling a desirable geological tale. pink sand and yellow, white sand and black, making a song sand and quicksand: Greenbergs photos show the sophisticated transformations of their colours, textures, sizes, and shapes. And as this infinitesimal international unfolds so does an exciting rationalization of ways each one grain of sand starts and varieties and reveals itself in a specific position, one in all one thousand million and special.
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Extra info for A Grain of Sand: Nature's Secret Wonder
In addition, beach sand can contain the magnificent skeletons of microscopic organisms. It is amazing how these delicate, minuscule forms of life survive the ravages and torrents of the surf. Some of these shelled creatures are so small that they're invisible to the naked eye. The oceans are filled with tiny, single-celled, amoeboid protists called foraminifera, or forams. Today, an estimated four thousand kinds of forams live in the world's 48 The ocean is thick with floating microscopic organisms called forams, easily seen when illuminated by shafts of sunlight.
Basalt also contains silica, but it is richer in magnesium, iron, and other heavier elements. Granite is a light-colored, coarse-grained rock formed deep within the Earth, exposed only after massive upthrust and erosion. It cools slowly because the Earth's insulation keeps the heat from being conducted away quickly. Granite is rich in feldspar and quartz. One of the most famous granitic rocks is Half Dome in Yosemite National Park, California. In contrast, basalt is a dark, fine-grained rock that cools relatively quickly because of its direct exposure to water or air.
The wind usually creates a gentle slope along the face of the dune; sand carried over the crest falls abruptly behind the dune, resulting in a steep slope on the backside. The ~cology of Beaches The coastal saltwater environment forms the foundation of one of Earth's most important ecological domains. Beaches fill distinct environmental niches inhabited by a variety of different plants and animals. The intertidal zone, located between the highest high-tide mark and the lowest low-tide mark, is an especially harsh environment that varies between extremes.
A Grain of Sand: Nature's Secret Wonder by Gary Greenberg