Download or read book The Geologic Story of Great Falls and the Potomac River Gorge Classic Reprint written by John C. Reed Jr. and published by Forgotten Books. This book was released on 2018-10-10 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Geologic Story of Great Falls and the Potomac River Gorge The Great Falls of the Potomac River is the most spectacular landscape feature of the Washington metropolitan area. It has influenced the lives and fortunes of man in the Potomac Valley for centuries. Countless generations of Indians used it as a place to gather, to trade, and to fish. For the early settlers it was a barrier to river navigation, an obstacle that canal builders struggled to overcome. The river above the falls has been the principal source of water for the city of Washington for more than 100 years. In its seaward course, the Potomac River crosses many small rapids and cascades, but these are insignificant in comparison with the foaming fury of Great Falls, where the river drops 12 meters in about 180 meters and is channeled into a narrow rock-walled gorge less than 25 meters wide in places. In the summer the flow may be less than liters a second, but during floods the flow commonly reaches 40 million liters a second. The average flow pouring over the falls is liters of water every second and in a year, more than trillion liters - enough water to flood the entire District of Columbia to a depth of 55 meters, converting the Washington Monument (169 meters high) into a tall lighthouse. During three periods of recent flooding in 1936, again in 1942, and still again in 1972 - water covered the towpath of the Chesapeake and Ohio (c and 0) Canal on the Maryland side of the river and spread across the area of the Visitor Center and parking lots on the Virginia side. Floods of this size are unusual; but about once every 2 years, floodwaters rise to the brink of the gorge at the falls, reaching to within 4 to 6 meters of the trails and overlooks along the cliffs. There have been 20 such floods since 1930. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Download or read book The River and the Rocks written by Geological Survey (U.S.) and published by . This book was released on 1970 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Geologic Story of Great Falls and the Potomac River Gorge written by John C. Reed (Jr.) and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The River and the Rocks written by George Wescott Fisher and published by . This book was released on 1969 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book River and the Rocks the Geologic Story of Great Falls and the Potomac River Gorge written by Geological Survey (U.S.) and published by . This book was released on 1975 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Geologic Story of Great Falls and the Potomac River Gorge written by John C. Reed and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The River and the Rocks written by United States Geological Survey and published by . This book was released on 1970 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The River and the Rocks written by John Calvin Reed (Jr.) and published by . This book was released on 1980 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The River and the rocks written by and published by . This book was released on 1970 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The River and the Rocks written by John Calvin Reed (Jr.) and published by . This book was released on 1984 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The River and the Rocks written by Harold J. Prostka and published by . This book was released on 1979 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The River and the Rocks written by John C. Reed and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The River and Rocks written by U. s. Government Printing Office and published by Createspace Independent Publishing Platform. This book was released on 2014-10-24 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Great Falls of the Potomac River has figured prominently in the purposes of men since prehistoric time. Long before John Smith reached the falls in 1608, groups of Indians from East and West met at this great river barrier to trade and perform ceremonies in honor of the spirit of the "Roaring Waters." As early as 1754, George Washington visualized the Potomac River as an important avenue of trade and communication with the interior. Records show that, with the exception of Mount Vernon, Great Falls was perhaps as intimately associated with George Washington's everyday life as any other place in the country. As first President of the "Potomac Canal Company," Washington frequently visited the working parties as they constructed the canal and lock system which skirted the treacherous falls on the Virginia side. Matildaville, a town of about 16 hectares named after the wife of "Light Horse" Harry Lee and consisting of various dwellings, grist mill, market house, forge, sawmill, and tavern, sprang up along the banks of the canal. In 1802, the Patowmack Company canals were essentially completed, and hundreds of boats plied the river, bringing corn and wheat, coal and limestone, flaxseed, and furs downstream from the mountainous region around Cumberland. Many of the boats were sold for lumber in Georgetown, thus sparing the boatmen an arduous upstream journey. After the establishment of the Nation's Capital, Great Falls became a popular scenic attraction for residents and visitors alike. But Great Falls was not always as easily accessible as it is today. In 1845, a newspaper columnist, after praising the beauty and historic interest of the region, added, "... the access to this interesting spot is, on both sides of the river, by the most infamous roads and the accommodations for visitors anything but what they ought to be!" Visitors to Great Falls now number more than one-half million annually and, because of this continuing and mounting interest, the U.S. Geological Survey has joined with the National Park Service in preparing this booklet for better understanding and enjoyment of the Great Falls of the Potomac River. The original edition was published in 1970. The current edition has been revised and expanded to incorporate new information, an enlarged trail log, and changes in trail locations. Because the policy of the Geological Survey is to foster use of the International System of Units, all measurements in this edition are in the metric system.
Download or read book Geologic Map Of The Potomac River Gorge Great Falls Park Etc U S Geological Survey Open File Report 00 264 2000 CD ROM written by and published by . This book was released on 2001* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Great Falls and Gorge of the Potomac River written by Charles William Eliot and published by . This book was released on 1927 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Brief Regarding Great Falls and Gorge of Potomac River as Major Park Project written by Ulysses S. Grant and published by . This book was released on 1927 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Crystaline Rocks of the Potomac River Gorge Near Washington written by John Calvin Reed and published by . This book was released on 1963 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: A description of the rocks exposed in the gorge of the Potomac River below Great Falls, with a discussion of their structural and metamorphic history.
