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Carlsbad Caverns (Reading Essentials in Social Studies)
Carlsbad Caverns - Reading Essentials in Social Studies
Author: Sara Louise Kras
Briney waves of an Inland Sea 250 million years ago provided a favorable environment for marine plants and animals to flourish. Their limey remains, along with calcium carbonate from the water, built up a reef which grew upwards and outwards while, for millions of years, the entire region subsided. The channels supplying water from the...  more »
ISBN-13: 9780756945015
ISBN-10: 0756945011
Publication Date: 8/15/2003
Pages: 40
Reading Level: Ages 9-12
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Publisher: Perfection Learning
Book Type: Library Binding
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