Roadside Geology of Maryland, Delaware, and Washington, D.C.

Roadside Geology of Maryland, Delaware, and Washington, D.C.


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From the sandstone ridges and shale and limestone valleys of western Maryland to the sand dunes and tidal estuaries on Delaware's coast, Roadside Geology of Maryland, Delaware, and Washington, D.C, steers you to the some of the best geologic features found inside and outside the Beltway. Thirty-five road guides discuss the landforms and rocks visible from a car window, along bike paths, and at nearby waysides and parks, including Chesapeake & Ohio Canal National Historic Park, Assateague Island National Seashore, Rock Creek Park, and Cape Henlopen State Park. With this book as your guide, find out how the sixth largest impact crater on earth helped shape Chesapeake Bay; discover what moved the rocks at Devils Racecourse in Catoctin Mountain Park; and learn how early settlers put the geology to work, locating major ports where deep tidal rivers issued from mill-friendly, rocky streams.

Product Details

ISBN-13: 9780878425709
Publisher: Mountain Press Publishing Company, Inc.
Publication date: 11/28/2010
Pages: 368
Sales rank: 607,187
Product dimensions: 6.00(w) x 9.00(h) x 1.40(d)

About the Author

John Means taught geology, physical science, and English at Hagerstown Community College for more than thirty years before retiring in 2005. He is the author of Maryland’s Catoctin Mountain Parks and enjoys hiking, camping, and canoeing with his family.

Matthew Moran is a visual arts teacher at Seneca Valley High School.

Suzannah Moran is a geography professor at Hagerstown Community College and teamed up with her husband Matthew to create the maps for Roadside Geology of Maryland, Delaware, and Washington, D.C.

Table of Contents

Acknowledgments ix

Introduction 1

Understanding the Earth 1

Plate Tectonics 1

Rocks 5

Geologic Time 5

Geologic History of Maryland, Delaware, and Washington, D.C 6

Ancient Cratons, Grenville Mountains, Rifting, and Offshore Deposition 6

Taconic Mountain Building Event and the Queenston Wedge 10

Acadian Mountain Building Event and the Catskill Wedge 12

Alleghanian Mountain Building Event 13

The Rifting of Pangea and Triassic Basins 16

Erosion of the Appalachians and the Building of the Coastal Plain 16

Pleistocene Ice Ages 17

Allegheny Plateau 19

Road Guides 23

Interstate 68 and US 40 Alternate: La Vale-West Virginia Border 23

US 219: Keysers Ridge-Backbone Mountain Trailhead, West Virginia 28

US 220: McCoole-Cumberland 35

Maryland 36: The Narrows-Westernport (Coal Country) 37

Maryland 135: Mountain Lake Park-McCoole 44

Valley and Ridge and Blue Ridge Provinces 48

Great Valley of Carbonates 51

Road Guides 55

Interstate 70 and US 40: Braddock-Hancock 55

Interstate 68 (Including MD 144 and US 40): Hancock-La Vale 71

Maryland 17: Middletown-Brunswick 87

Maryland 34: Boonsboro-Sharpsburg 90

Maryland 51: Cumberland-Paw, Paw, West Virginia 92

Maryland 67: Boonsboro-Sandy Hook 98

Maryland 68: Boonsboro-Clear Spring 104

Maryland 77: Thurmont-Smithsburg 111

Maryland 491: Smithsburg-Cascade 117

Maryland 550: Cascade-Thurmont 123

Bear Pond Mountains 124

Piedmont Province 128

The Fall Line 134

Road Guides to The Maryland Piedmont 135

Interstate 70: Frederick-Baltimore 135

Interstate 270: Frederick-Rockville 139

US 1/Maryland 273: Baltimore-Delaware Border (Cecil and Harford Counties) 146

US 15: Point of Rocks-Emmitsburg (the Frederick Valley) 155

Maryland 28 and C&O Canal: Point of Rocks-Blockhouse Point 162

Maryland 75 and Maryland 31: New Market-Westminster 171

Washington, D.C., and The Capital Beltway Area 176

Piedmont Sites 178

Chesapeake & Ohio Canal National Historic Park: Great Falls-Georgetown 178

Theodore Roosevelt Island National Memorial 187

Cabin John Regional Park 188

Rock Creek Park 189

Capital Crescent Trail 192

Sligo Creek Parkway 192

Wheaton Regional Park and Northwest Branch Trail 193

Coastal Plain Sites 193

The Mall and East and West Potomac Parks 193

Kenilworth Park and Aquatic Gardens 196

Bladensburg Waterfront Park and the Anacostia River 196

Lake Artemesia Park and Greenbelt Park 198

National Arboretum 199

Fort Circle Trail 199

Watkins Regional Park 200

Baltimore and The Baltimore Beltway Area 200

I-695: Baltimore Beltway 202

Piedmont Sites 204

Patapsco Valley State Park 204

Gwynns Falls Park 211

Bare Hills and Soldiers Delight Natural Environment Area 212

Cylburn Arboretum and Jones Falls 213

Loch Raven Reservoir 214

Oregon Ridge Park 215

Coastal Plain Sites 215

Patterson Park 215

Double Rock Park 216

Herring Run Park 217

The Delaware Piedmont 217

Wilmington Area 220

Fort Christina Park 220

Brandywine Park in Downtown Wilmington 220

Rockford Park 222

Brandywine Creek State Park 222

Bringhurst Woods Park 223

Brandywine Springs State Park 224

Mt. Cuba Area and Ashland Nature Center 225

Fox Point State Park 226

Newark Area 227

White Clay Creek State Park 227

Iron Hill Park 227

Coastal Plain 228

Wedge of Unconsolidated Sediment 229

Pleistocene Time 233

Chesapeake Bay 234

Barrier Beaches 239

The Future 242

Road Guides To Southern Maryland 243

Maryland 2: Annapolis-Solomons 243

Maryland 5 and Maryland 235: Washington D.C.-Point Lookout 251

Maryland 210, Maryland 224, and Maryland 6: Washington D.C.-Indian Head-Maryland Point-Port Tobacco 260

Road Guides To Maryland's Eastern Shore 264

US 50: Chesapeake Bay Bridge-Ocean City 264

Assateague Island National Seashore 282

US 113: Berlin-Pocomoke City 285

Maryland 213: US 301-Elkton 289

Road Guides To Delaware's Coastal Plain 292

US 301, US 13, and US 113: C&D Canal-Delmar 293

Delaware 1: Dover-Cape Henlopen-Fenwick Island 297

Delaware 9: Delaware City-Dover 305

Glossary 311

References 321

Index 328

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