Roadside Geology of Maryland, Delaware, and Washington D.C.
by John Means
Roadside Geology of Maryland, Delaware, and Washington D.C.
|
|
| 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-Thurmong |
123 |
| Bear Pond Mountains |
124 |
| Piedmont Provance |
128 |
| The Fall Line |
134 |
| Road Guides to the Maryland Piedmont |
135 |
| Interstate 70: Frederick-Baltimore |
135 |
| Interstate 270: Frederik-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 |
| Lock 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 |
| US 50: 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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