Index

abandoned channels, 410 Blue Ridge province, 201-206, 207-208, 261-263, Cote Blanche salt dome, 431 Acadian orogeny, 91-96 265-270, 271-274, 277-280 Adam Mountain, 223-226 bluffs, 355-357, 387-400 Upper, 327-330 Alabama brachiopods, 22-23, 35 Coffee Formation, 394 Birmingham, 185-190, 191-200 breccia, 20, 97-100, 119-122, 273 Demopolis Formation, 389 Blount County, 177-180 Breton barrier island, 445 Mooreville Marl, 388 Blount County, Oneonta, 175-176 Brevard fault zone, 251-256, 281-283 Prairie Bluff Formation, 369-372, 390 Calhoun County, 163-166, 173-174 Browns Mountain anticlinorium, 101-104 Providence Formation, 359-362 Chattahoochee River, Phenix City, 297-300 bryozoans, 22-23, 136 Ripley Formation, 390 Chilton County, 301-304, 305-308 Burning Springs anticline, 55-58 Tombigbee Sand, 388 Cleburne County, 163-166 burrows, 3, 33-35, 51, 160 Tuscaloosa Group, 363-367 Coosa County, 301-304 Cretaceous-Tertiary boundary, 369-372 eastern, 363–367 calcarenites, 324 crevasse splays, 412, 438 Lowndes County, Braggs. 369-372 caliche, 39-40 crinoids, 22–23 northeastern, Gadsden, 167–172 , 173-174, 266-267 Croatan National Forest, Neuse River St. Stephens Quarry, Lone Star Henderson Gneiss, 251-254 recreation area, 316 Cement Company Quarry, 373-378 Lower, 261-263, 271-274 cross-bedding, 39-40 Walker County, 181-183 Chilhowee Group, 163-166, 229 cryptoexplosion structures, 17–20 Washington County, 373-378 Shady Formation, 163-166 Cumberland Plateau, 43-46, 143-148 algae, 34 Caminada-Moreau coast, 450 Alleghanian orogeny, 265 canyons, 359–362 Dahlonega gold belt, 275 Allegheny Front, 85-90 carbonate rocks, 73–78, 153–157, 168–172, decollement zones, 143-148 Allegheny Plateau, 55-58, 101-104 345-349 deformation, 123-125, 143-148, 259-260 Alum Bluff, 355-357 Carolina slate belt, 235-237 deltaic plains, 435-440, 438-446, 447-452 amphibolite, 275, 298–299, 301 –304 Cartersville fault, 271-274 Devil’s Mill Hopper State Geological Site, amphibolite facies, 223–226, 239, 282 Catskill elastic wedge, 91-96 335-337 Appalachian fold-thrust belt, 173-180, 191-200 Cenozoic, 309-314, 321-322, 335-337 , 91-96, 101-104, 106-108 Appalachian gravity low. 97-100 Central Florida phosphate district, 339-342 Lower, Lay Dam Formation, 305-308 Appalachian orogen, 291-296 cephalopods, 22–23 Upper Appalachian Plateau, 113-118 Chalk Bluffs. 393 Greenland Gap Group, 79-83 Appalachians, 207-208 Chandeleur barrier island, 445 Hampshire Formation, 79-83 southern, 134–138, 167–180, 191-200 Cheniere Caminada, 450-451 Ohio Shale, 31-35 Appalachian Trail, 207-208 chenier plains, 425-430 diapirs, shale, 104 Atchafalaya delta, 444 chert, 104, 127 diatremes, 97-100 Atlantic Coastal Plain, 309-330, 331-334 Chestnut Ridge fenster, 123-125 dikes Avery salt dome, 431 chloritite, 227 andesitic, 97–100 chromitite, 227 diabase, 245-246, 249, 287 backswamp, 412,436 Chunky Gal Mountain, 261-263 granitic, 298 barrier shorelines, 448-452 Cincinnati Arch, 17-20 greenstone, 221 Bartletts Ferry fault zone, 291-296 elastics, 69–96, 105–112, 115–117, 131–136, distributaries, 442-443 basal lag deposits. 316 149-166, 185-190, 305-308, 317-320, 353. dolomite, 14-16, 26 basalt, 97-100 359-362, 383-386, 387-392, 393, 401-403 downdrift coasts, 444 basalt flows, 207-208 clay, 329–330, 355–357, 376–378 basement, Grenville, 277-280 cleavage, 166 earthquakes, 397–400 Baton Rouge fault zone, 423 crenulation, 230, 242, 276 Eastern Piedmont fault system, 291-296 Battleground Formation, lithology, 239-244 shear-band, 222 Eastern slate belt, 217-222 Bayou Lafourche delta, 447-452 slaty, 267–268 beaches, 425-426, 439, 448-452 cliffs, 316 Bashi Formation, 383-384 beach ridge plains, 352 climate, 332 Claiborne Group, Cockfield Formation, beach ridges, 331-334, 351-353 coal, 3–4, 47–50, 52, 57, 156, 181, 187 401-403 Belle Isle salt dome, 431 coal bloom, 2 Clinchfield Sand, 328-329 bentonite. 26 Coalburg syncline, 177 Cook Mountain Formation, 379-382 biostratigraphy, 371-372, 377-378, 392, 407 Concord gabbro-syenite complex, 231-233 Cook Mountain Formation, Archusa Marl Birmingham anticlinorium, 191-200 conglomerate, 105, 170, 241 Member, 379-382 bivalves, 22, 317, 407 Coosa deformed belt, 173-174 Hatchetigbee Formation, 385-386 Blacksburg Formation, lithology, 239-244 Copland coal zone, 52 Jackson Group, 397-403 black shale, 31-35,48 coral reefs, 347 Moodys Branch Formation, 401-403 Black Warrior basin, 177, 181-183, 195 corals. 347 Yazoo Clay, 401-403 Blount Springs, 177-180 Corbin Gneiss complex, 277-280 Kosciusko Formation, Dobys Bluff tongue, Blue Ridge anticlinorium, 215-216 Cordierite. 240 379-382 453

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Tallahatta Formation, Basic City Shale Member, northwestern, Catoosa County, 159–162 Knobs, 31-35 383 southeastern, 331–334 Little Hickman 7½-minute Quadrangle, 25-29 Tivola Limestone, 328-329 southwestern, Stewart County, 359–362 Mammoth Cave area, 7-12 Twiggs Clay, 328-329 Twiggs County, Huber, 327-330 Barren River, 10 Yazoo Clay, 377 Walker County, 153-157 Cedar Sink, 10-12 Eocene-Oligocene boundary, 373-378 Glade gap, 261-263 Glasgow upland, 8 erosional surfaces, 3-4 Glen Lyn syncline, 114-115 Little Sinking Creek, 9-10 escarpments, see scarps gneiss, 223, 230, 251-256, 275, 277-280, 297-300 Pilot Knob, 9 Everglades National Park, 343-344 layered, 293-294 Sinkhole Plain, 8-9 exogene features, 17–20 Goat Rock fault zone, 291-296 Maud 7½-minute Quadrangle, 13-16 extrusional environment, 207–208 gold, 247-250, 275 Menifee County, 43-46 grainstone, 139 Natural Bridge State Park, 43-46 Falls Lake mélange, 223 Grande Isle flanking barrier island, 451-452 Nelson County, 13-16 faults, 2, 268, 271-274 Grandfather Mountain window, 229 northeastern, 37-41 basement, 191-200 granite, 246, 285-290 Pennyrile Parkway, 1-6 compressional, 309-314 Grantsboro scarp, 315 Perry County, 47-50 low-angle, 144, 303 granulite, 257-260 Pomeroyton 7½-minute Quadrangle, 43-46 thrust, 58, 101-104, 113-118, 119-122, Great Smoky fault, 266 Powell County, 43-46 137-138, 165 Grecian Rocks, 345 Red River Gorge Geological Area, 43-46 thrust, imbricate, 173-174 Greenlap gap, 69-72 Rowan County, 31-35, 37-41 thrust ramps, 191-200 greenstone, 212, 219 Shelby County, 17-20 thrust sheets, 229–230 Gulf Coastal Plain, 363-367, 383-386, Shelbyville 7½-minute Quadrangle, 17-20 zones, 28-29, 251–256, 281–283, 291-296. 387-392, 401-403, 405-407, 409-424, Slade 7½-minute Quadrangle, 43-46 397-400 425-430, 431-434, 441-446 south-central, 13–16 fensters, see windows St. Charles 7½-minute Quadrangle, 4 Five Islands, 431-434 Haile Gold Mine, 247-250 Turnhole Spring groundwater basin, 7-12 flaser bedding, 81 Harpers Ferry water gap, 201-206 Waddy 7½-minute Quadrangle, 17-20 Florida Hayesville fault, 262, 257 western, 1–6 Alachua County, Devil’s Mill Hopper, 335-337 heavy mineral deposits, 332-333 Wolfe County, 43-46 northeastern, 331–334 , 409-412, 425-430 Kentucky River fault system, 25-29 panhandle, Liberty County, 355-357 upper, 351-353 Kings Mountain belt, 239-244 peninsular, 345-349 hydrogeology, 7-12 Dade County, 343-344 lag deposits, 323 Franklin County, 351-353 igneous rocks, 231–233 Lake Borgne, 446 Monroe County, 343-344 impact features, 17–20 levee ridges, 410 west-central, 339-342 inclusions, quartz, 240 levees, 438 fluvial landforms, 409-412 inselbergs, 227 limestone, 14-16, 22-23, 25-29, 37-41, 127, flysch, 105-108 intrusions, 97-100, 245–246, 285–290 369-372, 376-378 folds, 143-148, 166, 224, 260 mafic, 231 lineation, 145, 286 anticline, 55–58, 175-176, 177–180 see also diatremes Linville Falls fault, 229-230 anticlinoria, 101–104, 191-200 see also dikes Lithofacies. 115-117, 127-130, 167-172, 363-367 isoclinal, 108, 286, 292–303 invertebrates, 61, 87, 380–381 loess. 419 mesoscopic, 262, 267–268, 273, 298 iridium anomalies, 19-20 Lookout Mountain, 153-157 synclines, 114-115 iron ore, Clinton, 104 Louisiana synclinoria, 149–152 northeastern, Concordia Parish, 409-412 foliation, 392 Jefferson salt dome, 431 northern, 413-418 mylonitic, 279, 293 joints. 29 southeastern, Florida Parishes, 419-424 parallel, 242 dilation, 285 southern, 425–430, 431-434, 435-440, foraminifers, 371-372, 392, 407 441-446, 447-452 planktonic, 377-378 kaolin, 327-330 Kentucky, 7-12 mafic rocks, 275–276 gabbro, 231-233 Carter County, 37-41 mangrove, 344, 349 gastropod, 22-23, 317 central, 25–29 marble, 242 geomorphology, 43-46, 321-322, 343-353, Cincinnati region, 21-24 marl, 379–382 359-362, 409-412, 419-450 Covington 7½-minute Quadrangle, 21-24 marshes, 426, 435, 441 Georgia Daniel Boone National Forest, 43-46 Max Meadows tectonic breccia, 119-122 Atlanta, 275-276 east-central, 31-35, 43-46 meander belts, 409 Atlanta, Chattahoochee River, 281-283 eastern, Knott County, 51–53 meander scrolls, 411 Atlanta area, 285-290 Farmers 7½-minute Quadrangle, 31-35 mélange, 209-214, 223 Bartow County, 277-280 Four Comers, 47-50 Mesozoic, 309-314 Columbus, 297-300 Fredericktown section, 13-16 metabasalts, 216 Columbus, Chattahoochee River, 291-296 Hazard North 7½-minute Quadrangle, 47-50 metadiamictite, 305–308 Dade County, 153-157 Jeptha Knob cryptoexplosion structure, 17-20 metagabbro, 216, 237 Murray County, Carters dam, 271-274 Kenton County, 21-24 metagraywackes, 209-214 Kentucky Parkway, 1-6

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metamorphic rocks, 217–222, 239–244, 247–250, Mt. Barton, Bashi-Tallahatta section, 383-386 Drakes Formation, 13-15 251-256, 291-296, 297-300 mudflats, 427 Drakes Formation, Bardstown Member, granulite facies, 277-280 mudlumps, 440 13-14 metaigneous, 215–216, 223–226, 275–276 Murphrees Valley anticline, 175-176 Grant Lake Limestone, 14-16 metasedimentary, 209-214, 215–216, 281-283, mylonite, 292 Sequatchie Formation, 160-161 305-308 organic build-ups, 135-139 metavolcanics, 207–208 natural arches, 43-46 Orthomylonite, 294–295 metamorphism, 257–260 neotectonics, 397 outliers, 383-386 contact, 246 New Madrid fault zone, 397-400 oxbow lakes, 411 retrograde, 277–280 nodules, siderite, 5 thermal, 288 North Carolina metapelite, 209-214 Cabarrus County, Concord, 231-233 Huber Formation, 328 migmatite, metatexite, 260 Clay County, Shooting Creek, 261-263 lower, , 369-372 mines Cleveland County, Kings Mountain, 239-244 Pine Barren Member, 369-372 Foote Mine, 243 Craven County, Cape Lookout area, 315-320 Paleoenvironment, 23-24, 28-29, 51-53, 91-96 gold, 247-250 Halifax County, 217-222 see also sedimentation Haile Gold Mine, 247-250 Linville Falls 7½-minute Quadrangle, 229-230 paleogeography, 75 kaolin, 327-330 Macon County, 257-260 , 315-320 phosphate, 339-342 Morrow Mountain 7½-minute Quadrangle, paleoslumps, 5-6, 53 see also slumps spodumene pegmatite, 243–244 Albemarle, 235-237 paleosols, pedogenesis, 365 Miocene Northampton County, 217-222 Paleozoic, 69-72, 85-90, 119-122, 123-125, Chipola Formation, 355-356 Pamlico County, 315-320 143-148, 149-152, 153-157, 177-180, Hawthorn Group, 355-356, 335-342 Surry County, Pilot Mountain, 227-228 191-200, 201-206, 209-214, 232 Hawthorn Group. Bone Valley Member, Transylvania County, Rosman, 251-256 classic sequence, 131–136 339-342 Wake County, 223-226 lower, 247-250 Mississippi North Louisiana Salt Basin, 413-417 metamorphism, 257–260 Clarke County peat, 333 Chickasawhay River, 379-382 Ocoee Gorge, 265-270 peat swamps, 331 Dobys bluff, 379-382 Okefenokee Swamp, 331-334 pegmatite. 287 Hinds County Oligocene Pegmatite district, 239-244 Jackson. 401-403 Ashley River rock phosphate, 323-325 , 1-6, 43-46 Riverside Park locality, 401-403 Bumpnose Limestone, 377 Lauderdale County, Mt. Barton, 383-386 Byram Formation, 377 Springfield Coal, 4-5 Lowndes County, 387-392 Chickasawhay Limestone, 377 western Kentucky No. 9 coal, 4–5 Oktibbeha County, 387-392 Forest Hill Sand, 377 Caseyville Formation, 2-3, 5 Warren County, Haynes Bluff quarry, 405-407 lower, Vicksburg Group, 405-407 Lower , 44-46 Marianna Limestone, 377 Bremen Sandstone, 181-183 Greenbrier Group, 79-83 Red Bluff Clay, 377 New River Formation, 111-112 Lower upper, Chandler Bridge Formation, 323–325 Pocahontas Formation, 111 Bedford Shale, 31-35 olistostromes, 305–308 Pottsville Formation, 181-183, 185-190 Chattanooga Shale, 127 olivine basalt, 97-100 Pottsville Group, 55-58 Fort Payne Chert, 127-129 ophiolite?, 215–216, 257 , 1-2 Grainger Formation, 127-129 ophiolite, 223 Middle Maccrady Formation, 127-129 Orangeburg Scarp, 321-322 Allegheny Formation, 55-58 Sunbury Shale, 31-35 , 73-78, 101-104, 173-174 Breathitt Formation, 47-50, 51-53, 38-41 Mauch Chunk Group, 79-83 Cincinnatian, 21-24 stratotype sections, 59–68 Middle, Borden Formation, 38-41 Bellevue Limestone, 21-24 Upper, Conemaugh Group, 55-58 Pocono Formation, 79-83, 91-96 Fairview Formation, 21-24 Pennyrile fault system, 1 Upper Kope Formation, 21-24 perched beaches, 425 Bluestone Formation, 110-112, 115-117 Miamitown Shale, 21-24 petroleum, 55-58 Newman Limestone, 38-41, 127-129 see also Upper wells, 103 Pennington Formation, 38-41, 127-129 Martinsburg Formation, Fincastle Conglomerate petrology, 97-100, 209-222, 231-233, 235-238, Mississippian-Pennsylvanian transition, 37-41, 45, Member, 105-108 239-244, 245-246, 281-283, 285-290, 60-68, 109-112 Middle, 167-172 297-300, 301-304 Mississippi embayment, 383 Camp Nelson Limestone, 25-29 Phenix City Gneiss, 297-300 Mississippi River Chapman Ridge Formation, 134-139 phosphate, 323-325, 339-342 delta complex. 431-446 High Bridge Group, 25-29 phosphate minerals, 244 deltaic plain, 447-452 Holston Formation, 134-139 phyllite, 275 Mississippi Valley, 409-412, 435-440 Oregon Formation, 25-29 Piedmont, 209-214, 215-216, 228, 245-246, Mitchell Dam Amphibolite, 301-304 Tyrone Limestone, 25-29 275-276, 297-300 molasse, 105–108 Upper, 13-16, 167-172 pillow structures, 208 mollusks, 383–384 Ashlock Formation, 13-16 Pilot Mountain State Park, 227-228 molybdenite, 250 Bardstown Member, 13 Pine Mountain block, 123-125 Morrow Mountain State Park, 237 Catheys Formation, 159-160 Pine Mountain window, 291

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planar structures, 286 sedimentation, 113–118 see also thermal waters plant , 52, 61, 182 alluvial plains, 363–367 St. Bernard marshes, 445-446 Pleistocene, 332 back barriers, 181-183 St. Clair-Clinchport Thrust, 113-118 Pleistocene barrier islands, 315 St. Vincent Island, 351-353 Citronella Formation, 356-357, 419-421 barrier spit, 315-320 St. Vincent National Wildlife Refuge, 351-353 Flanner Beach Formation, 315-320 coal-forming environment, 343–344 steinkern, 391 Key Largo Limestone, 345-349 deltaic, 51-53, 109 Stephen C. Foster State Park, 334 Miami Limestone, 343-349 deltaic, flood-tidal, 181-183 stocks, 231 oolitic member, 345–349 distributary-mouth bar, 51-53 Stone Mountain granite pluton, 285-290 undifferentiated, 351 environment, 409-412 Straight Mountain fault, 175-176 Pliocene, Jackson Bluff Formation, 356-357 fluvial, 435-440, 441-446 stratabound deposits, 250 plutons, granite, 285-290 interglacial, 315–320 stratigraphy, 13–16, 21 –24, 31-50, 59–96, point bar accretion, 411 lagoonal, 315-320 105-112, 127-136, 153-157, 167-172, Potomac River, 201-206 nearshore, 327-330 185-190, 201-206, 235-238, 327-330, Precambrian, 271-274 progradational sequences. 159-162 355-362, 369-372, 377-395, 398, 401-407 upper, 261–263 shelf, 91-96, 165–166, 315–320 see also biostratigraphy Catoctin Formation, 207-208 shelf-edge, 134–139 structural analysis, 145–148, 166, 222, 224–226, Lynchburg Group, 215-216 transgression, 407 230, 247-248, 259-263, 266-273, 293-296, Ocoee Series, 266-267 see also paleoenvironment 392-394, 239-244 Tillery Formation, 235 Sequatchie anticline, 177-180 structural geology, 55-58, 85–90, 101 –108, Uwharrie Formation, 235 Sequatchie Valley, 143-148 113-122, 137-138, 143-152, 173-180, Providence Canyons State Park, 359-362 serpentinite, 227 191-206, 227-228, 281-290, 297-300, Pulaski-North Mountain décollement, 108 shale, 14–16, 22-23, 37-41, 105–108, 127 309-314, 413-417 Pulaski thrust sheet, 119-122 shear zones, ductile, 239 see also faults Pumpkinvine Creek Formation, lithology, 275-276 shell beds, 429 see also folds shell islands, 445 subdeltas, 442 quartzite, 165-166, 227 Shenandoah Mountain, 91-96 Suwanee Canal Recreation Area, 334 kyanite, 240 Shenandoah National Park, 207-208 swamps, 322, 331-334, 343–344, 435, 445 quartz keratophyre, 219 Shenandoah River, 201-206 syenite. 231–233 quartz-sand-waves, 135-139 Shenandoah Valley, northern, 73-78 Shores Complex. 209-214 Taconic sequence, 73-78, 85-90, 105-108 Raleigh belt, 223-226 silicified wood, 322 Talladega slate belt, 305-308 Rayburns Dome, 415-416 sills, metagabbro, 236 Tallahatta Cuesta, 383 Reelfoot Lake area, 397-400 siltstone, 2-3, 4 tectonics, synsedimentary, 191-200 Red Top Mountain State Park, 277-280 silty shale, 2-3 Tennessee, southeastern, 265-270 reefs, 347 , 101-104, 107-108 Tennessee see also coral reefs Lay Dam Formation, 305-308 Bradley County, 149-152 rhyolite, 236 Lower, 73-78 Grainger County, 131-136 Ridgely ridge, 400 Lower, Red Mountain Formation, 161-162 Hancock County, Newman Ridge area, 127-130 Ringgold Gap. 159-162 Upper, Helderberg Group, 91-96 Hardin County, Coffee Landing, 393-395 rivers, 441–446 sinkholes, 8-12, 335–337 Knox County, Sharp Gap, 137-138 Roanoke Rapids complex, 217-222 skeletal sand-banks, 135–139 Knoxville 7½-minute Quadrangle, Knoxville, Rodriguez Bank, 345-349 slump features, 337 139-142 roots, 3 slumps, 5–6 northwestern, 397-400 Rosman fault, 254-255 see also paleoslumps Savage Point 7½-minute Quadrangle, Dunlap, Rough Creek Fault, 5 soapstone, 227 143-148 soft sediment deformation, 237 Thorn Hill, 131-136 salt domes, 413-418 soils, 324, 423 terraces, coastal, 331-334 physiography, 431-434 solution collapse features, 335–337 Tertiary, 355-357 Saltville fault, 137-138 see also sinkholes thermal waters, 104 Saltville thrust sheet, 119-122 South Carolina thin-skinned deformation. 123-125 sand, 355–357 Cherokee County, 239-244 Tiptonville dome, 399 sand blows, 400 Ladson 7½-minute Quadrangle, Charleston, trace fossils, 22, 162 sandstone, 2-4, 6, 51–53, 105–108, 181–183, 323-326 Cruziana sp., 2 363-367 Lancaster County, Kershaw, 247-250 trachyte, 97-100 Sauratown Mountains anticlinorium, 227 Orangeburg County, Orangeburg Scarp, Trail Ridge, 331-334 scarps, 321–322, 400 321-322 transgression, 316 schist, 223 Taxahaw 7½-minute Quadrangle, Lancaster, trilobites, 22-23, 235-236 schistosity, 241, 259–260 245-246 Trimble Knob basalt diatreme, 97-100 sea level, 315-320, 321–322, 351 York County, 239-244 turbidity currents. 166 sedimentary structures, 23–24, 80-82, 135–139, spodumene pegmatite, 239-244 181-183, 186-188, 191-195, 305-308, Spout Spring Gap, 175-176 Uchee belt, 297-300 315-317, 328-329, 364, 421 springs, 7–12, 177–180 ultramafic, 225–226 cyclic bedding, 23 thermal, 104 unconformities, 77, 170, 224, 328, 336, 360, 386, 407

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Vacherie Dome, 416-417 southwestern, 113–118 northwestern Valley and Ridge province, 69-72, 97-100, southwestern, Pepper, 119–122 Ritchie County, 55-58 105-108, 110-122, 149-152, 185-190, Spotsylvania County, Fredericksburg, 309-314 Willow Island 7½-minute Quadrangle, 55-58 201-206, 265-270 volcanism, 207–208 Wood County, 55-58 vertebrates, 325, 342 Pendleton County, Judy Gap, 85-90 Virginia, 73-78 waterfalls, 72 Pocahontas County, 101-104 Botetourt County, 105-108 water gaps, 69–72, 159–1 62, 201–206 Raleigh County, 109-112 central, 207–208 Waverly Arch, 37-41 Randolph County, Elkins, 79-83 central, Fluvanna County, 209-214 weathering, 328 south-central, 59–68 Eagle Rock Gorge, 105-108 Weeks salt dome, 431 Whiteoak Mountain synclinorium, 149-152 Fincastle Valley, 105-108 West Virginia, Batoff Creek section, 109-112 Wills Mountain anticline, 69-72 Franklin County, Rocky Mount, 215-216 eastern, 113–118 Winding Stair Gap, 257-260 Harpers Ferry water gap, 201-206 West Virginia windows, 123–125, 229–230 Highland County, 97-100 eastern, Pendleton County, 91–96 Winnfield Dome, 413-414 Lee County, 123-125 Grant County, 69-72 Harpers Ferry water gap, 201-206 xenoliths, 286

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