By Gary Greenberg
This is the realm considered inside of a grain of sand, because of the beautiful 3-dimensional microphotography of Dr. Gary Greenberg. to a few, 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 a similar. using the glorious microphotographic options that he constructed, Greenberg invitations readers to find the unusual and beautiful global that every grain of sand comprises.
Here are the sands of Hawaii and Tahiti, the Sahara and the Poles, a volcano, every one exquisitely assorted, 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 sophisticated alterations of their shades, textures, sizes, and shapes. And as this infinitesimal global unfolds so does an interesting rationalization of ways each one grain of sand starts and kinds and unearths itself in a selected position, certainly one of one thousand million and distinct.
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Extra resources for A Grain of Sand: Nature's Secret Wonder
Magnetite, also know as lodestone, is a naturally occurring magnetic material (magnification 35x). Magnetite in sand can sometimes look like an oil streak. The magnetite accumulates in patches because of its density. Kate Hintz Sand grains made of dark minerals, garnets, and quartz were collected from High Blufflsland, Sand grains from Plum Island, Massachusetts, are made of garnet, magnetite, quartz, and green olivine Northwest Territories, Canada (magnification 85x). (magnification 85x). A tiny yellow crystal is found as a grain of sand from Plum Island, Massachusetts (magnification 11 Ox).
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. It was actually underwater and contained a huge sandy seabed. The oncesandy bottom compressed into sedimentary rock and the land rose up from tectonic forces.
53 halimeda, are important creators of some tropical sand beaches. Halimeda is sometimes called the "money plant" because it consists of flat, round segments that resemble coins. On some coral atolls, these seaweeds are responsible for as much as 90 percent of the sand. The Movement of Sand Baldwin Beach, Maui, is a dramatic reminder that sand is a dynamic landform. Powerful winter waves removed most of the sand from the beach in a couple of days during a 2006 storm . Top: A danger sign is posted after the storm.
A Grain of Sand: Nature's Secret Wonder by Gary Greenberg