Rockhounding Delaware, Maryland, and the Washington, DC Metro Area
by Robert Beard
Rockhounding Delaware, Maryland, and the Washington, DC Metro Area
|
|
| Acknowledgments |
xi
|
| Introduction |
1
|
| Rockhounding Basics |
4
|
| Geology |
12
|
| Natural Resources |
16
|
| How to Use This Guide |
20
|
| Map Legend |
24
|
| Delaware | |
| 1. Wilmington Bringhurst Gabbro |
27
|
| 2. Wilmington Blue Gneiss |
30
|
| 3. Woodlawn Quarry Mica and Feldspar |
33
|
| 4. Brandywine Springs Park Sillimanite |
36
|
| 5. White Clay Creek Orange Feldspar |
39
|
| 6. Iron Hill Geothite and Limonite |
42
|
| 7. Chestnut Hill Boxwork Limonite |
45
|
| 8. New Castle Battery Park Sea Glass |
48
|
| 9. Chesapeake and Delaware Canal Belemnites and Exogyra Oysters |
51
|
| 10. Odessa Petrified Wood |
55
|
| 11. Woodland Beach Sea Glass |
59
|
| 12. Kape Henlopen Beach Quartz |
62
|
| Maryland | |
| 13. Big Elk Creek Orange Feldspar |
67
|
| 14. Elk Neck Hematitic Conglomerate |
70
|
| 15. Betterton Beach Sea Glass |
73
|
| 16. Tolchester Beach Sea Glass |
76
|
| 17. Octoraro Creek Serpentine |
79
|
| 18. Conowingo Dam River Rocks |
81
|
| 19. Black Barren Road Serpentine |
84
|
| 20. Conowingo Creek - Pilot road Serpentine |
86
|
| 21. Conowingo Boat Landing Schist and Micaceous Granitic Rock |
88
|
| 22. Whiteford Slate |
91
|
| 23. Cardiff Serpentine |
94
|
| 24. Kilgore Falls Pelitic Schist |
96
|
| 25. Loch Raven Lower Dam Quarry Albite Pegmatites |
99
|
| 26. Herring Run Marble, Feldspar, and Tourmaline |
103
|
| 27. Herring Run River Rocks and Glass |
106
|
| 28. Robert e. Lee Park Serpentine and Chromite |
109
|
| 29. Falls Road Serpentine Quarry |
112
|
| 30. Bare Hills Copper Mine Hornblende Schist - Chalcopyrite |
115
|
| 31. Gunpowder River Garnet and Crenulated Schist |
118
|
| 32. Hunt Valley McCormick Road Marble |
122
|
| 33. Hunt Valley Mall Garnet |
125
|
| 34. Oregon Ridge Goethite and Marble |
127
|
| 35. Soldiers Delight Serpentine |
129
|
| 36. Mineral Hill Mine Malachite and Talc Schist |
133
|
| 37. Dogwood Creek Feldspar and Mica Schist |
136
|
| 38. Frost Quarry Albite Feldspar |
139
|
| 39. Henryton Tunnel area Feldspar Quarry |
141
|
| 40. Middle Patuxent Banded Marble and Graphic Granite |
144
|
| 41. Sykesville Mine Specular Hematite |
146
|
| 42. Elba Furnace Glassy Slag |
149
|
| 43. Bowie Siderite and Shark Teeth |
152
|
| 44. Tarnans Branch Vivianite Concretions |
156
|
| 45. Bayfront Park Shark Teeth |
159
|
| 46. Flag Ponds Beach Shark Teeth |
162
|
| 47. Clavert Cliffs State Park Shark Teeth |
166
|
| 48. Chancellor Point Beach Quartz |
168
|
| 49. Point Lookout Beach Quartz |
171
|
| 50. Catoctin Furnace Glassy Slag and Limonite |
174
|
| 51. Highway 40 Metarhyolite |
177
|
| 52. Highway 40 Catoctin Metabasalt |
179
|
| 53. Highway 355 Frederick Limestone |
182
|
| 54. Ballenger Creek Road Potomac Marble |
185
|
| 55. Point of Rocks Goethite and Limonite |
187
|
| 56. McCoys Ferry Devonian Fossils |
190
|
| 57. Pecktonville Devonian Brachiopods |
193
|
| 58. Sandy Mile road Debonian Brachiopods and Gastropods |
196
|
| 59. Sideling Hill Roadcut |
199
|
| 60. Woodmont Station Devonian Brachiopods |
202
|
| 61. Corriganville Silurian-Debonian Crinoids and Brachiopods |
205
|
| 62. Hoffman Hill Strip Mine Pennsylvanian Plant Fossils |
209
|
| 63. Dawson Devonian Fossils |
211
|
| Washington, DC Metropolitan Area | |
| 64. Muirkirk Clay Pits Dinosaur Park |
216
|
| 65. Bladensburg Siderite and Limeonite |
219
|
| 66. Wheeler Road Vivianite |
222
|
| 67. Henson Creek Tributary Fossils |
225
|
| 68. Fort Washington Gypsum Crystals and Fulgarites |
228
|
| 69. Piscataway Creek Tributary Turritella and Armored Mud Balls |
232
|
| 70. Purse State Park Shark Teeth and Turritella Fossils |
235
|
| 71. Westmoreland State Park Shark Teeth |
239
|
| 72. Caledon State Park Shark Teeth |
242
|
| 73. Government Island Sandstone Quarry |
244
|
| 74. Leesburg Potomac Marble |
247
|
| 75. Paint Branch Orange Feldspar and Micacceous Gneiss |
251
|
| 76. Northwest Branch Tributary Garnet and Tourmaline |
254
|
| 77. Travilah Serpentine Barrens |
257
|
| 78. Great Falls of the Potomac |
260
|
| Referances Cited |
263
|
| Site Index |
267
|
| About the Author |
270
|
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