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6. the Incision History of a Passive Margin River, the Potomac Near Great Falls
6. The Incision History of a Passive Margin River, the Potomac Near Great Falls By Paul Bierman,1 E-an Zen,2 Milan Pavich,3 and Luke Reusser1 Introduction was done at the Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory, Livermore, Ca., in This field trip focuses on the emerging significance of collaboration with Robert Finkel. complex geomorphic processes that have operated in a pas- sive margin setting in the mid-Atlantic region (fig. 1A). The application of cosmogenic exposure dating to understanding the responses of rivers to Quaternary tectonic, eustatic, and Regional Framework: The Complexity of climatic variations is providing unprecedented information Passive Margin Settings about landscape histories. This trip presents new information about the response of the Potomac River to regional variabili- Passive margins, the trailing edges of continental plates, ty in sea level and climate over the late Pleistocene and are geomorphically complex. Despite the absence of active Holocene. We present a regional framework, field observa- tectonics, passive margins exhibit features such as great tions of the morphology of the Potomac River gorge below escarpments (Matmon and others, 2002; Bank and others, Great Falls (fig. 1B), and data on the age relations of strath 2001), river gorges, and marine terraces (Flint, 1940; Cooke, terraces associated with the Potomac River gorge. 1952). New analytical techniques, such as fission track ther- mochronology (Naeser and others, 2001) and cosmogenic iso- tope exposure dating (Bierman and others, 2002) are provid- Acknowledgments ing insights into the processes that control passive margin evolution. Passive margins exhibit both stable and active fea- We want to recognize the exceptional contributions of tures. -
Chesapeake and Ohio Canal 2018 Park Planner
Chesapeake and Ohio Canal 2018 Park Planner Explore the Park For Emergencies Dial 911 or 1-866-677-6677 Biking The Canal Towpath provides 184.5 miles of gravel path for biking. • Ride single file • Bells and helmets are recommended • Stay to the right except when passing • Yield right of way to all pedestrians and horses • Children under age 16 must wear bike helmets • Walk bike across aqueducts Boating and Fishing Non-motorized boats are allowed in watered sections of the canal, motorized vessels are prohibited. • Boat ramp access to the Potomac River can be found on the park map • Personal Flotation Devices are required by the State of Maryland Fishing in the canal and river is regulated by the Maryland Department of Natural Resources. Visit www.dnr.state.md.us for more info. Dog Walking Dogs are permitted in the park. They must be on leash no longer than 6 feet and under the owner’s physical control. Dogs are not permitted on Olmsted Island and Billy Goat Trail A. Hiking The C&O Canal has a variety of hiking opportunities for all skill levels. In addition to the 184.5 miles of towpath, there are 14 miles of trails in the Great Falls area as well as the 2 mile Paw Paw Tunnel Trail. • Trail maps are available at visitor centers • Bring water • Wear sturdy footwear • Be prepared for changing weather conditions Horseback Riding Horses are permitted on the towpath from Swains Lock (mile 16.6) upstream to Candoc/Offutt Street (mile 181.8). Horses are NOT allowed at the following locations: • Georgetown (mile 0) to Swains Lock (mile 16.6) • Candoc/Offutt Street (mile 181.8) to Cumberland Terminus (mile 184.5) • Paw Paw Tunnel • Drive-in/walk-in campgrounds • Picnic areas • All other hiking areas Group Picnicking Group picnicking is available at the Carderock Pavilion. -
The River and the Rocks
The River and the Rocks *y. vrt^HT ft, 6 The Geologic Story of Great Falls and the Potomac River Gorge Depository ^il LIBRARIES GEOLOGICAL SURVEY BULLETIN 1471 OHIO STATE UNIVERSITY LIBRARIES The Geologic Story of Great Falls and the Potomac River Gorge The River and th ^^ ihn BP^-" ulrtMP' tocks The Geologic Story of Great Falls and the Potomac River Gorge By JOHN C. REED, JR., ROBERT S. SIGAFOOS, AND GEORGE W. FISHER U.S. Geological Survey Bulletin 1471 UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON: 1980 UNITED STATES DEPARTMENT OF THE INTERIOR CECIL D. ANDRUS, Secretary GEOLOGICAL SURVEY H. William Menard, Director Library of Congress catalog card No. 80-600023 For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C. 20402 Stock Number 024-001-03280-5 Foreword to the Second Edition 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 "Patowmac Canal Company," Washington frequently visited the working parties as they con structed the canal and lock system which skirted the treacherous falls on the Virginia side. -
Along the Towpath
ALONG THE TOWPATH A quarterly publication of the Chesapeake & Ohio Canal Association Concerned with the conservation of the natural and historical environment of the C&O Canal and the Potomac River Basin. VOLUME XLII September 2009 Number 3 The Heritage Hike Set for November 7 By Dorothea Malsbary, on behalf of the Program Committee The Association's annual Heritage Hike is involve bus transportation but rather is a set for Saturday, November 7, from Han loop walk, heading outbound on the cock to Pearre in the vicinity of Sideling Western Maryland Rail Trail (WMRT) to Hill. Featured are three hiking options Locher Road. and returning along the along the towpath, a dinner, and an eve towpath. All hikers will walk back to ning presentation. The hikes will begin their vehicles at their own pace. D evil's Eyebrow and end in Hancock, Maryland, easily ac- The approximate hike lengths back Round Top Cement Anticline l\fill Ruins cessed from I-70 at exit 3, a left hand exit, to the parking lot at Little Tonoloway in or from Rte. 522 coming from Berkeley Springs, W.Va.. The Hancock (mile 124.5), the mileposts and amenities at the starting three hike lengths are approximately 12, 6 and 4 miles. The eve points are: ning events will be held at the American Legion in Clear Spring, 1) Pearre and lock 56, 12 miles, milepost 136.21, Porta Maryland. Johns at WMRT parking. Hike participants will park their cars and meet the shuttle Pearre is the current terminus of the 23-mile Western Mary bus in the Little Tonoloway parking area, near mile marker 124.5, land Rail Trail. -
Volunteers' Handbook
Chesapeake and Ohio Canal National Historical Park Volunteers’ Handbook A Guidebook to the Volunteers-in-Parks (VIP) Program 2010 Edition Table of Contents WELCOME ........................................................................................................................ 4 Preface to the 2009 Handbook ............................................................................................ 5 Introduction ......................................................................................................................... 6 The Purpose of National Parks ....................................................................................... 6 A Brief History of the National Park Service ................................................................. 8 A Brief History of the Chesapeake and Ohio Canal National Historical Park ............... 8 1971 Enabling Legislation; The Park’s Mission Statement ............................................ 9 Volunteer Service in the C&O Canal National Historical Park ........................................ 10 Mission of the C&O Canal National Historical Park’s VIP Program .......................... 10 Volunteer Positions in the C&O Canal National Historical Park ................................. 10 Who Can Volunteer?..................................................................................................... 14 NPS Employees and Family Members as Volunteers .................................................. 15 What Can Volunteers Do? ........................................................................................... -
Hiking Trails of Great Falls Maryland National Park Service U.S
Hiking Trails of Great Falls Maryland National Park Service U.S. Department of the Interior Chesapeake and Ohio Canal National Historical Park Potomac, MD ) VIRGINIA i m d 1 . a Mile 15 2 o ( R . Conn r ls T l e a Island in F M rd ) i Fo m 1 ( r. GREAT FALLS TAVERN T r e v VISITOR CENTER Paved Road Comfort Station i R Towpath Hiking Trail Access Washington Aqueduct Observation Deck Towpath Mileage Information M from start of canal Lock 20 a in Georgetown, Parking Go c VFW Spur ld A Washington, D.C. r (0.1 mi) M t Lock 19 h i n e Picnic Area Spur ( u Accessible Trails 0 r . Lock 18 Lock 19 8 Great Falls Overlook B Ranger Station Hiking Trails Spur(0.3 mi) m o d Mile 14 i u ar Olmsted Island Overlook Tr. ) lev Maryland Mine Trail Marker (TM) Snack Bar Lock 17 (0.7 mi) Falls Rd. Spur Rocky (0.2 mi) Overlook Telephone Islands Overlook Spur (0.1 mi) CHESAPEAKE Gold Mine Loop Lock Water Stop Gate (1.6 mi) r & OHIO CANAL pu Stop Gate Bridge B Lock S i NAT’L. HISTORICAL l 16 6 ) l 1 i y L o ck m G (0 3 PARK o Lock . a 15 A t B Rockwood Spur T n r e W . r g m (0.5 mi) S l e a o e c r o . s R A d o S a l p ( TM-1 d 1 ( a u GEORGE WASHINGTON . -
Potomacpotomac
PotomacPotomac Paddling through Nature Newcomers & Community Guide, Inside Two people paddling in a kayak and canoe are framed by the locks of the C &O Canal Historical Park. Inside Classifieds, Page 6 Classifieds, Potomac ❖ Calendar, Page 4 Newcomers & Community Guide Enjoying the towpath by horseback in the C &O Canal Historical Park. 2016-2017 Photo by Mary Kimm/The Almanac Biking 192 Miles for Local MediaNewcomers Connection LLC online at www.connectionnewspapers.com Cancer Research & Community Guide News, Page 3 Memories of Cabin John Park Opinion, Page 7 Photo by Mary Kimm/The Almanac www.ConnectionNewspapers.comAugust 24-30, 2016 onlinePotomac at Almanac potomacalmanac.com ❖ August 24-30, 2016 ❖ 1 News Email announcements to [email protected]. Include date, time, location, Bulletin Board description and contact for event: phone, email and/or website. Photos and artwork welcome. Deadline is Thursday at noon, at least two weeks before event. Detectives Investigate THROUGH AUG. 30 SUNDAY/SEPT. 18 Riolo. Free. Contact Joan Kahn at Pop-up Rabbi. Dates, times and locations vary. Rabies Vaccine Clinic. 8-10:30 a.m. at 7315 [email protected] or 240- Interested in chatting with a rabbi, or have a Muncaster Mill Road, Derwood. The 221-1370. Visit Drowning question? Rabbi Adam Raskin of Congregation Montgomery County Animal Services and www.PotomacCommunityVillage.org for more. Har Shalom invites community members to join Adoption Center will hold rabies vaccination Detectives from the Montgomery County him for a cup of coffee. Free. Contact Carly clinics through September. The vaccinations are Police Major Crimes Division continue to Litwok at [email protected] or 301-299- free with the purchase of a Montgomery County FRIDAY-SUNDAY/OCT.