Reconstructed Fort Roberdeau


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The Story of Fort Roberdeau, 1777 T0 1783


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Fort was also known as Lead Mine Fort, located in Tyrone Township above Arch Spring.




Fort Roberdeau


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Fort Roberdeau


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Fort Roberdeau and Its Founder


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Pennsylvania Battlefields & Military Landmarks


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From the French and Indian War to the Civil War, Pennsylvania was often the setting for bloody battles and other important military events. This book is a travel guide to these sites and more, outlining what happened at each location, providing visitor information, such as hours, admission fees, directions, and special events.




Sinkholes


Book Description

Everything young readers 12 and up ever wanted to know about these unique formations. A sinkhole is a hole in the ground, but a very special one, appearing anywhere where rock dissolves allowing the ground above it to sink. Some sinkholes happen gradually, but others open up almost instantly. (These are the ones you hear about in the news when one swallows a house.) Sinkholes happen worldwide—from valleys in the high Himalayan Mountains to the depths of the Adriatic Sea, from the crystal-clear springs of Florida to the oases of the Arabian Desert. With 140 color photos, this book illustrates how sinkholes are an important part of our natural environment.