Sentences with phrase «soil thousands of years old»
Not exact matches
As the researchers sifted through the soil, the magnitude of the find slowly became clear: The canyon revealed a trove of thousands of animal and plant fossils that were more than 1.4 million years old.
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In 1938, Walter Lowdermilk, a senior official in the Soil Conservation Service of the U.S. Department of Agriculture (USDA), traveled abroad to look at lands that had been cultivated for thousands of years, seeking to learn how these older civilizations had coped with soil erosSoil Conservation Service of the U.S. Department of Agriculture (USDA), traveled abroad to look at lands that had been cultivated for thousands of years, seeking to learn how these older civilizations had coped with soil erossoil erosion.