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A Grain of Sand: Nature's Secret Wonder by Dr. Gary Greenberg, Stacy Keach PDF

By Dr. Gary Greenberg, Stacy Keach

ISBN-10: 0760331987

ISBN-13: 9780760331989

Потрясающие трёхмерные микрофотографии песчинок обычного пляжного песка. listed below 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. purple sand and yellow, white sand and black, making a song sand and quicksand: Greenbergs photographs exhibit the sophisticated variations of their shades, textures, sizes, and shapes. And as this infinitesimal global unfolds so does an interesting clarification of the way every one grain of sand starts off and types and unearths itself in a selected position, certainly one of one billion and special. Вот тот мир, рассматривать в песчинку, благодаря потрясающей трехмерной микрофотографии доктор Гари Гринберг. В какой-то, весь песок выглядит так - бесчисленное зерен в обширном пространстве пляжа. Присмотритесь - гораздо ближе - и ваш взгляд на песке никогда не будет то же самое. Используя фантастические microphotographic методы, которые он разработал, Гринберг приглашает читателей поймет странный и прекрасный мир, что каждая песчинка содержит. Вот песках Гавайев и Таити, Сахары и поляки, вулкан, изысканно каждого разные, и каждая рассказывает увлекательную геологической истории. Красный и желтый песок, белый песок и черный, пение песка и зыбучие пески: Greenbergs фотографий выявить тонкие различия в их цвета, фактур, размеров и форм. И так как это бесконечно малая мире разворачивается так же интригующий объяснение того, как каждая песчинка начинается и форм и оказывается в определенном месте, одна из миллиардов и единственный в своем роде.

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

Example text

The size and power of the waves affect the rate of transport of sand. The transport of sediment along the seashore is part of a process called littoral drift. When you stand on the beach with your feet in the water, you feel the frantic race of sand rushing past your feet. The movement of the sand is so powerful that it literally undermines your footing on the shoreline. If you put on goggles and swim out just past the wave break, you can look down at the sand and watch it move with each successive wave.

Waves, currents, and winds drive a continual process of creation and erosion. In order for the size and shape of a beach to look the same week after week, the rate at which sand is being added must equal the rate at which it is being eroded. On a macroscopic scale, the entire beach undergoes continual change, and even on a microscopic scale, the individual sand grains erode and change shape as well. Wave action moves huge amounts of sand daily. As waves approach shallow water, they slow down due to friction with the ocean floor.

With the help of my mentor and The Edge 3D Microscope was used to create the images in this book. 29 good friend Professor Alan Boyde at University College London, I built a working prototype in 1990, and, to our delight, it performed well enough for us to proceed with further development. Low-power 3-D microscopes have been available for more than a hundred years, and they can achieve magnifications up to about 50 times. But no high-power 3-D microscopes were available that produced real-time stereo images of the specimen in the magnification range of 100 to 1,500 times.

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A Grain of Sand: Nature's Secret Wonder by Dr. Gary Greenberg, Stacy Keach

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