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Index

Acadian orogeny, 289-292, 311-315, 433- Coal, 43-45, 412-413 439 Inwood Marble, 138 Coal seams, 31-32 magmatism, 293-300 Lower Coastal geology, 213-220 Adirondack-Champlain Valley boundary, Adeyton Group, 467-471 Coastlines, 213-220 151-154 Bomoseen Formation, 142 See also Shorelines Age Brigus Formation, 467-471 Columnar structures, 417 dates, 10, 16, 26 Browns Pond Formation, 233-237 Conglomerate, 311-315 Albee Formation, allochthon, 250-255 Dunham Dolomite, 229-232 Connecticut Alleghany orogeny, 55-58, 113-118, 187- East Passage Formation, 196-197 eastern, Willimantic fault, 169–173 190, 191-194 Lowerre Quartzite, 138 Farmington River gorge, Tariffville, 165- Allochthons, 66-69, 451-456 Middle Granville Slate, 233-237 168 Anchizone alteration, 62 Pirate Cave Formation, 195-196 northern, Hartford basin, 165–168 Annieopsquotch Complex, 441-444 Middle southeastern Antigonish Terrane, 421-426 Chamberlain’s Brook Formation, 467- Glacial Park, 175-180 Appalachian Basin, 113-118 471 Ledyard recessional moraine, 175-180 Appalachians Dutch Island Harbor Formation, 199 West Torrington 7½-minute Quadrangle, Birmingham window, 37-41 Fort Burnside Formation, 198-199 Cameron’s Line, 159-164 Canada, 363-368 Jamestown Formation, 197-198 Craig Harbor faultline scarp, 151-154 Piedmont, 77-80 Manuels River Formation, 467-471 Cretaceus Valley and Ridge province, 1-3, 5-8, Monkton Quartzite, 230-232 Magothy Formation, 88 37-41, 47-50, 55-58 West Castleton Formation, 233-237 Merchantville Formation, 88 Archean, komatiite, 317-322 Winooski Dolomite, 230-232 Mount Laurel Sand, 89 Aretes, 305 Mount Hamilton Group, 233-237 Navesink Formation, 90 Arkose, 165-168 Rowe Schist, 201-204 Raritan Formation, 88 Aroostook-Matapedia Carbonate Belt, 385- Saint John Group Redbank Formation, 90 388 Forest Hills Formation, 399-402 Tinton Formation, 90 Atlantic Coastal Plain, 19-24 Glen Falls Formation, 399-402 Upper New Jersey, 87-90 Hanford Brook Formation, 399-402 Englishtown Formation, 23-24 Autochthons, 247-255 Ratcliffe Brook Formation, 399-402 Magothy Formation, 23-24 Avalonian orogeny, 209-212, 403-408 Upper Marshalltown Formation, 23-24 Danby Quartzite, 230-232 Matawan Group, 23-24 Baie Verte Line, 457-461 Eliott Cove Formation, 467-471 Merchantville Formation, 23-24 Barre pluton, 239-242 Gatesburg Formation, 37, 39 Mount Laurel Formation, 23-24 Basalt, 165-168 Harcourt Group, 467-471 Potomac Formation, 23-24 pillow, 91-95, 391 Hatch Hill Formation, 142 Wenonah Formation, 89 tholeiitic, subaerial, 415-120 Hatch Hill Formation, 233-237 Woodbury Formation, 88 Basement complexes, 15-18 Warrior Formation, 37, 39 Crust, 451-456 Basins Waramaug Formation, 161-164 evolution, 187–194, 209–212 See also Precambrian-Cambrian Deformation, 311-315 post-Acadian, 311-315 Cambrian-, Goldenville Forma- cobble, 192 Bay of Islands Complex, 451-456 tion, 433-439 Delaware Beaches, 427-431 Cameron’s Line, 137-138, 159-164 Chesapeake and Delaware Canal, 23-24 berms, 19-22 Canadian Shield, 317-331, 329-338 Delaware Bay Bedding planes, 7 Cape Cod National Seashore, 213-220 Cape Henlopen spit, 19-22 Belknap Mountains Complex, 263-267 Carbonate rocks, 51-54, 120-121, 141-145, Lewes, 19-22 Berry Mountain Gap, 49 147-150, 357-362, 385-388 northern, Bringhurst Woods Park, 25–28 Biostratigraphy, diatoms, 12 , 187-194 Denna Lake Structural Complex, 327-331 Birmingham fault, 37 187-190 Block stripes, 259-261 Westphalian, Cumberland Group, 409-413 Buttermilk Falls Formation, 71-73 Bloody Bluff fault zone, 205-208 Central Maine turbidite belt, 279-283 Catskill Formation, 71-73 Blue-Little Mountain Gap, 47 Champlain thrust fault, 225-228 Catskill Formation, Duncannon Member, Boudinage, 48,53-54 Chromite mines, 369-372 75 chasm, 193 Chronostratigraphy, 61-63 Hamilton Group, 123-127 pinch-and-swell, 65 Cirques, 305 Lower Boulder fields, 75-76 Clastics, 65-69, 81-86, 443-444 Becraft Formation, 120-121 Bronson Hill anticlinorium, 247-249 Clay mineralogy, 62 Carrabassett Formation, 277-278, 279- Claystone, 44 283 Cacapon Mountain anticline, 6 Cleavage, 38, 57, 113-118 Coeymans Formation, 120-121 Calcite crystals, slip systems, 53 fracture, 6-7 Eastport Formation, 290 Caliche, 62 slaty, 437 Helderberg Group, 120-121, 123-127

477

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Hildreths Formation, 278 age, 153–154 Kalkberg Formation, 120-121 Fault scarps, slickenside and pseudotachylite, Lower Littleton Formation, 247-255, 257-258 154 East Berlin Formation, 165-168 Madrid Formation, 279-283 Fault zones, thrust, 141-145 Hampden Basalt, 165-168 Manlius Formation, 120-121 Flow, ductile, 54 Holyoke Basalt, 165-168 Rondout Formation, 120-121 Flysch, 144-145, 360-362 Hook Mountain Basalt, 91-95 Mahantango Formation, 71-73 Folds Orange Mountain Basalt, 91-95 Marcellus Formation, 71-73 anticline, 6–8, 37-41, 56 Palisades sill, 91-95 Middle, 123-127, 129-132 kink, 48 Portland Arkose, 165-168 Middle, Mapleton Formation, 311-315 recumbent, 53 Preakness Mountain Basalt, 91-95 Palmerton Formation, 71-73 shear zone, 163 Shuttle Meadow formation, 165-168 Ridgeley (Oriskany) Formation, 71-73 Foliation, 78 Talcott Basalt, 165-168 Schoharie-Esopus Formation, 71-73 Fossils, 9-14 Watchung Basalts, 91-95 Trimmers Rock Formation, 71-73 Foster Hill fault, 253-255 North Mountain Basalts, 415-420 Tristates Group, 123-127 Fractures Trout Valley Formation, 293-300 filling, vein calcite, 54 Katahdin pluton, 293-300 Upper, 129-132 joints, 113-118 Katahdin-Traveler Igneous Suite, 293-300 Brallier Formation, 29 joints, hydraulic extensional, 56 Kearsarge-Central Maine Synclinorium, 279- Catskill delta complex, 29-35 Fracture-suture zones, 205-208 283 Catskill Formation, 29-30, 34 Frost action, Wisconsinan, 76 Kettle topography, 178-179 Duncannon Member, 29-30, 34 Klippen, 65-69 Genesee Group, 113-118 Gabbro, 25-28 Komatiite, 317-322 Irish Valley Member, 29-30, 34 Geomorphology, 1-3, 19-22, 75-76, 97-104, Lock Haven Formation, 29, 32, 34 257-262, 303-306 Lava, pillow, 443 Perry Formation, 290 See also Glacial geology Lherzolite, 451-456 Rockwell Formation, 29-30, 34-35 Glacial geology, 175-180, 213-220, 257-262, Lithofacies, 59-63, 379-383 Upper, Sherman Creek Member, 29-30, 34 303-306, 339-343, 345-348, 353- Diabase 355, 427-431, 445-450 Magma chambers, exhumed, 293-300 sills, 81, 91–95 See also Block stripes Mahantango Mountain Gap, 49 , 49 Glacial Lake Iroquois, 339-343 Maine Diamictite, 473-476 Glaciation, 221-224, 427-431, 445-450 central, Skowhegan–Waterville region, Diamicton, 341-343 Glaciomarine deposits, 221-224 279-283 Dikes Glamorgan Gneiss Complex, 327-331 eastern, Eastport, 289-292 lamprophyre, 184 Gloucester fault zone, 349-352 north-central monchiquite, 185 Gneiss, 15-18, 243-246, 269-271 Baxter State Park, 293-300 sheeted, 392, 443 banded, 25-28 Mount Katahdin, 303-306 Domes, structure, 243-246 leucogranitic, 155-158 northeastern, Presque Isle, 311–315 Drift, glacial, 221-224 Gold ores, 433-439 Penobscot County, Crommet Spring, 307- Dropstone, 474 Gorges, 97-104 309 Dunes, cross-parallel, 20 Granite, 181-185, 239-242, 243-246, 269- South Portland and Cape Elizabeth, Dunnage melange, 464-465 271 285-288 Granodiorite, intrusive, 285-288 western, Rangeley, 273–278 Elmtree terrane, 389-393 Green Mountains-Sutton Mountains Anti- Mantle, 451-456 Emery, 134-136 clinorium, 363–368 Marshes, Lewes Creek marsh, 21 Eocambrian Grenville province, 327-331, 337-338 Maryland Bull Formation, 233-237 Central metasedimentary belt, 333-336 Baltimore County, 15-18 Nassau Group, 233-237 Cliffs of Calvert (Calvert Cliffs), 9-14 Hamburg klippe, 65-69 Little Orleans, 1-3 Faults, 56-58 Hard clay, 43-45 Washington County, 5-8 conjugate, 38, 48 Harzburgite, 451-456 Mascoma dome, 243-246 correlation, 253–255 Holts Ledge Gneiss, 243-246 Massabesic Gneiss Complex, 269-271 distribution, 349-352, 357-362 Honest Hollow fault, 38 Massachusetts ductile, 169-173 eastern duplex, 143 Ichnofossils, 130-132, 385-388 Bloody Bluff fault zone, 205-208 extensional, 49 Igneous activity, 293-300 Boston basin, 209-212 fault zones, 205-208 Igneous rocks, 263-267, 323-326, 327-331, Lexington, 205-208 grabens, 415-420 421-426, 441-444, 451-456 Nantucket, Sankaty Head, 221-224 high-angle, 6 composition, 133-136 southeastern, Cape Cod National Seashore, strike-parallel, 48 ultramafic, 201–204 213-220 thrust, 7, 66-67, 225-228 see also Basalt western, Middlefield, 201 –204 transverse, 48 See also Granite Meanders, incised, 1-3 wedge, 48 See also Komatiite Meguma terrane, 433-439 wrench, 39 See also Rhyolite Mélange, 144-145, 393, 457-461, 463-466 wrench, conjugate, 57 See also Volcanic rocks , 165-168 Faulting, 193 Intrusive complexes, composite, 263-267 White Mountain Series

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Albany Porphyritic Quartz Syenite, 266 southeastern, Frederick Brook, 395–398 Hudson Valley Fold-Thrust Belt, 123- Ames Monzodiorite, 264 southern, Hanford Brook area, 399–402 127 Belknap dike rocks, 266 southern, Saint John district, 403–408 Westchester County, 133-136 Belknap Syenite, 264 Newfoundland western, Erie County, 107-112 Cobble Hill Syenite, 264 eastern western, Gowanda Hospital late Endicott (Brecciated) Diorite, 264 Avalon peninsula, 467-471, 473-476 Pleistocene site, 107-112 Gilford Gabbro, 264 Bacon Cove, 467-471 Niagara Falls, genesis and evolution, 97-104 Gilmanton Monzodiorite, 264 Conception Bay, 467-471 Nittany anticline, 37-41 Lake Quartz Syenite, 264, 266 Duffs, 467-471 Nova Scotia Moat Volcanics, 266 Manuels river, 467-471 Bay of Fundy region, Scots Bay region, Rowes Vent Agglomerate, 266 Baie Verte Peninsula, Coachman’s Harbour, 415-420 Sawyer Quartz Syenite, 264 457-461 Cumberland County, Joggins, 409-413 Metallogeny, 433-439 north-central, New World Island, 463–466 Northumberland Strait, Antigonish, 421- Metamorphic rocks, 161-162, 165-168, southeastern 426 191-194, 201-204, 247-255, 257- Double Road Point, 473-476 southern, Isaacs Harbour, 433–439 258, 285-288, 327-331 St. Mary’s Bay, 473-476 southwestern, Clare, 427–431 contact, 133–136 southwestern high-grade, 137-140 Annieopsquotch Complex, 441-444 Oil shale, 395-398 metasedimentary, 155-158 St. George’s Bay, 445-450 Ontario See also Gneiss western, Bay of Islands region, 451-456 central, Burleigh Falls, 337–338 See also Mylonite New Hampshire Central Metasedimentary Belt/Central See also Schist central, Belknap Mountains Complex, Gneiss Belt Boundary, 327-331 Metamorphism 263-267 east-central, Sudbury, 323-326 contact, emery, 134–136 northern, Mount Washington–Crawford Grenville province greenschist facies, 333-336 Notch area, 257-262 Madoc-Marmora-Havelock area, 333- mylonitization, 205-208 northwestern, Littleton, 247–255 336 retrograde, 188 south-central, Millford, 269–271 Minden, 327-331 Miocene west-central, Mascoma Dome, 243–246 northwestern, Munro Township, 317-322 Chesapeake Group New Jersey southern, Ottawa area, 349–352 Calvert Formation, 9-14 Monmouth County, Atlantic Highlands, southwestern, Lake Erie bluffs, 345–348 Choptank Formation, 9-14 87-90 Totonto, 339-343 St. Mary’s Formation, 9-14 northern Welland County, Niagara Falls, 97-104 middle, 9–14 Palisades Sill, 91-95 Ophiolite, 441-444, 451-456, 457-461, Parker Creek bone bed, 14 Watchung basalt flows, 91-95 369-372 Miramichi terrane, 389-393 west-central, Delaware valley, 8 1–86 Ordovician, 143 Mississippian west-central, Lumberville Quadrangle, 81 – Ammonoosuc Volcanics, 243-246 Albert Formation, 395-398 86 Bobcaygeon Formation, 349-352 Burgeon Sandstone, 43-45 New York Elmtree Group, 389-393 Lower Adirondack lowlands, 155-158 Fournier Group, 389-393 Burgeon Sandstone, 30-31, 35 Albany County Gull River Formation, 349-352 Rockwell Formation, 30-31, 34-35 Helderberg Escarpment, 119-121 Hartland Formation, 161-164 Mauch Chunk Formation, 59-63, 73 Thatcher State Park, 119-121 Inwood Marble, 138 Middle, 59-63 eastern Lower, 65-69, 441-444 Pocono Formation, 73 Bald Mountain, 141-145 Axemann Formation, 37, 39 Spechty Kopf Formation, 73 Catskill Tectonic Delta Complex, 129- Dead River Formation, 249-255, 274 Upper, 59-63 132 Epler formation, 51 Upper, Loyalhanna Formation, 30-31, 35 Fort Miller 7½-minute Quadrangle, Nittany Formation, 37-39 Upper, Mauch Chunk Formation, 30-31, 141-145 Poultney Formation, 233-237 35 Schaghticoke Gorge, 141-145 Shin Brook Formation, 307-309 Mississippian-Pennsylvanian boundary, 43- Washington County, 141-145 Stonehenge Formation, 37, 39 45, 59-63 Finger Lakes District, Taughannock Falls- Martinsburg Formation, 71-73 Molasse, 59-63 Watkins Glen, 113-118 Middle, 65-69 Mollusks, 87-90, 221-224, 427-431 New York City Ammonoosuc Volcanics, 249-255 Montmorency fault, 357-362 Manhattan Island, 137-140 Bellefonte Formation, 37, 39 Moraines, 305 the Bronx, 137-140 Chazy Group, 148-149 recessional, 175–180 Niagara County, Niagara Falls, 97-104 Glens Falls Limestone, 150 Mudstone, 412 northeastern Hartland Formation, 139 Mylonite, 169-173 Essex County, 151-154 Indian River Slate, 235-237 Port Henry, 151-154 Loysburg Formation, 37, 39 northern Manhattan Schist, 138 Nappes, Taconian, 51-54 Canton, 155-158 Mt. Merino Formation, 235-237 New Brunswick Crown Point peninsula, 147-150 Orwell Limestone, 149-150 northeastern, Bathurst area, 389–393 southeastern Partridge Formation, 249-255 northern, Runnymede, Restigouche river, Catskill, 123-127 Pawlet Formation, 235-237 385-388 Cortlandt Complex, 133-136 Shadow Lake Formation, 337

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Trenton Group, 357-362 Llewellyn Formation, 61 Precambrian-Paleozoic Willard Mountain Group, 235-237 Pottsville Formation, 59-63 Caldwell Formation, 364-365 Rockcliffe Formation, 349-352 Pottsville Group, 31-32, 35 Casco Bay Group Shadow Lake Formation, 349-352 Pottsville Group, 43-45 Cape Elizabeth Formation, 285-288 Tetagouche Group, 389-393 Penobscot orogeny, 307-309 Cushing Formation, 285-288 Upper, 37, 39 Diamond Island Formation, 285-288 Cortlandt complex, 133-136 granite, 269-271 Scarboro Formation, 285-288 Ellis Bay Formation, 373-377 Narragansett Pier Granite, 181-185, 187- Spring Point Formation, 285-288 Grog Brook Group, 385-388 190 Spurwink Metalimestone, 285-288 Joliet Group, 373-377 Westerly Granite, 181-185 Dunham formation, 367-368 Quimby Formation, 249-255, 275 Peters Mountain Gap, 49 Melbourne Formation, 365-366 Ordovician- boundary, 373-377 Petrology, 243-246, 317-322 Oak Hill Group, 365 Orogeny, 51-58, 187-190, 191-194 Piermont Allochthon, 249-255 Pinnacle Formation, 366 Pine Mountain Complex, 266-267 Sweetsburg Formation, 365 Paleoecology, 9-14, 221-224 Pittsburgh-Huntingdon synclinorium, 43 Tibbit Hill Formation, 366-367 Paleosols, 62, 110-111 Plants, trees, 413 Precambrian-Paleozoic boundary, 337-338 Paleozoic, 47-50, 100-104, 151, 403-408 Pleistocene, 1-3, 427-431 Pressure solution, 193 Bay of Islands Ophiolite, 451-456 Betancour Till, 353-355 Proterozoic, 151-152, 403-408 lower, 37-41, 159-164, 205-208 Columbia Formation, 23-24 middle, Fordham Gneiss, 137-138 Bringhurst gabbro, 25-28 Gentilly Till, 353-355 Rowe Schist, 201-204 Wilmington complex, 25-28 Glacial Lake Deschaillons varves, 353-355 upper, 159-164 Wissahickon Schist, 77-80 Sangamonian, 221-224 Boston Bay Group, 209-212 overstep rocks, 421-426 St. Pierre sand and peat, 353-355 Massabesic Gneiss Complex, 269-271 upper, 29–35 upper Yonkers Gneiss, 137-138 Palisades sill, age, site description, 91-95 Collins till, 107-112 Paw Paw meander, 3 Gowanda paleosol, 110-111 Quarries, granite, economic geology, 239-242 Pegmatite, 329-330 Thatcher till, 107-112 Quaternary, 97-104 gabbro, 27 Wisconsinan Scarborough sand, 339-343 Pennsylvania 221-224 Thorncliffe Formation, 339-343 Anthracite region Port Talbot interstadial, 345-348 upper, 445–450 Bear Valley strip mine, 55-58 Tyrconnell Formation, 345-348 Quebec Sharp Mountain, 59-63 Plume structures, 115 Anticosti Island, Cap Henri, 373-377 Carbon County, 71-73 Plutons, 293-300 Gaspé Peninsula, Port-Daniel/Gascons and Carbon County, Hickory Run boulder field, composition, 181–1 85 Black-Cape area, 379-383 75-76 granite, 239-242 Quebec City, Montmorency Falls, 357-362 central Potomac river, geomorphology, 1-3 southern Birmingham, 37-41 Precambrian-Paleozoic, Thetford Mines ophi- Richmond, 363-368 Spruce Creek 7½-minute olite, 369-372 Thetford Mines, 369-372 Quadrangle, 37-41 Precambrian St. Lawrence Lowland, Lac St. Pierre, Tyrone 7½-minute Quadrangle, 37-41 327-331 353-355 Clearfield County, Curwensville Reservoir, Burleigh gneiss complex, 337 43-45 Canton leucogranitic gneiss bodies, 155- Reckley Flat abandoned meander, 3 eastern 158 Red Beach Granite, 291 Berks County, 65-69 Chelmsford Formation, 323-326 Rhode Island Kutztown 7½-minute Quadrangle, 65-69 Grenville Supergroup, 333-336 southern Elizabethtown 7½-minute Quadrangle, 51- Cordova Gabbro, 336 Aquidneck Island, 195-200 Deloro Granite, 336 Conanicut Island, 195-200 Quadrangle, 51-54 Kaladar Conglomerate, 336 Narragansett Basin, 187-190, 191-194 Harrisburg, 47-50 Marmora Formation, 335-336 Narragansett Bay, 195-200 Lehigh river, 71-73 Onaping Formation, 323-326 southwestern, Westerly, 181-185 Philadelphia, Wissahickon Creek, 77-80 Pyrites leucogranitic gneiss bodies, 155-158 Rhyolite, 293-300 Pottsville, 59-63 Sudbury Breccia, 323-326 River gaps, See Water gaps Shamokin 7½-minute Quadrangle, 55-58 upper southeastern Conception Group, 473-476 Lancaster County, 51-54 Gaskiers Formation, 473-476 Sandstone, 44,62, 311-315, 385-388 Rheems quarry, 51-54 upper, Georgeville Group, 421-426 channel and sheet, 411-412 Susquehanna River Water Gaps, 47-50 Precambrian-Cambrian Schist, 201-204 west-central, Horseshoe Curve, 29–35 Glenarm Supergroup micaceous, 77–80 Pennsylvanian Baltimore gneiss, 15-18 Sea-level changes, 427-431, 445-450 Allegheny Group, 43-45 Cockeysville Formation, 17-18 Sedimentary rocks, 165-168, 233-237 Lower Loch Raven Schist, 17-18 See also Arkose Pottsville Formation, 59-63 Setters Formation, 16-18 See also Carbonate rocks Pottsville Group, 31-32, 35 Glenarm Supergroup, Wissahickon Group, See also Clastics Middle 17-18, 77-80 See also Limestone Allegheny Group, 31-32, 35 See also Turbidite

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Sedimentary structures, 33 Vassalboro Formation, 283 Taconian suture, 201-204 biogenic structures, 130-132 WaterviIle Formation, 282-283 Taconic Allochthon Frontal Thrust, 141-145 Sedimentation Wills Creek Formation, 5-8 Taconic orogeny, 51-54, 138, 233-237, 465 cyclic, Triassic, 81-86 Sinking Valley duplex, 38 Taconic unconformity, exposures, 123-127 environment Sinking Valley fault, 37 Tectonics, 389-393, 457-461 coastal, 9–14 Slickensides, 39, 57 décollement, 37-41 Ordovician, 65-69 Spits, 19-22 Tectonite, 330-331 Paleozoic, 59-63 St. Nicholas thrust, 138-139 Terranes, 144, 201-212 shelf, 9–1 4 Starks Knob, 145 Avalonian, 403-408 strand-line, 129–132 Stocks, 293-300 Avalonian, composite, 421-426 glaciomarine, 473-476 Stratigraphy, 5-8, 15-18, 23-24, 29-35, exotic, 285–288 Lithofacies, platform, 229-232 37-41, 43-45, 59-63, 71-73, Meguma, 433-439 provenance, 314-315 87-90, 100-104, 119-121, 123- shear zones, 169–173 transgressive, carbonate platform, 357-362 127, 138, 147-150, 165-168, 195- structure, 389–393 Sedimentology, 433-439 200, 209-212, 233-237, 247-255, Tidal flats, 19-22 Shale, 2, 113-118 273-278, 279-283, 307-309, 311- Till, 107-112, 353-355 See also Oil shale 315, 323-326, 337-338, 339-343, Traveler Rhyolite, 293-300 Shell beds, 13 345-348, 349-352, 353-355, 357- Triassic, 403-408 Shin Brook Formation, type section, measured 362, 363-368, 373-377, 379-383, Upper section, 307–309 385-388,389-393,399-402, 403- Lockatong Formation, 81-86 Shoals, Hen and Chickens shoal, 20 408, 409-413, 421-426, 463-466, , 81-86 Shorelines 467-471 New Haven Arkose, 165-168 position, 21 See also Biostratigraphy Passaic Formation, 81-86 See also Coastlines Stream piracy, 3 Turbidite, 67, 279-283 Silt, 107-112 Stromatolites, 335-336 Tyrone Gap, 39 Siltstone, 44, 113-118 Structural analysis, 47-54, 55-58, 65-69, Tyrone-Mount Union lineament, 39 Silurian, 379-383, 463-466 113-118, 139-140, 187-194, 225- Bloomsburg Formation, 5-8, 71-73 228, 281-283, 433-439 Unconformities, 43-45, 12-14, 23-24, 143, Clough Formation, 243-246, 249-255 folds, ductile deformation, 161-164 291-292, 337-338, 391, 405, 421- Fitch Formation, 247-255 Structural geology, 47-54, 55-58, 65-69, 426, 463 Lower 113-118, 123-127, 138-139, 151- Taconic, 123-127 Anticosti Group, 373-377 154, 161-164, 169-173, 187-190, Becscie Formation, 373-377 191-194, 199, 201-204, 205-208, Veins, 433-439 Dennys Formation, 290 225-228, 279-283 Vermont Greenvale Cove Formation, 275 See also Deformation Champlain thrust fault, 225-228 Matapedia Group, 385-388 See also Structure northwestern, 229–232 Quoddy formation, 289,290 See also Structural analysis Burlington, 225-228 Rangeley Formation, 247-255, 257- See also Tectonics Lone Rock Point, 225-228 258, 275-276 Structure, 323-326, 330-331, 349-352, 403- southwestern, Fair Haven, 233–237 Madrid Formation, 277 408,433-439, 464-465 Washington County, Barre granite quarries, Middle, Edmunds Formation, 290 cross-folds, 38 239-242 Perry Mountain Formation, 249-255, 277, duplex, 38 Vertebrates, terrestrial, 413 281 gneiss complexes, 269-271 Volcanic rocks, 165-168, 335 Sangerville Formation, 279-283 granite, 239-242 Volcanism, Silurian-Devonian, 289-292 Shawangunk Formation, 71-73 kink band, 38 Smalls Falls Formation, 277,281 ramp, 38 Water falls, 97-104 Upper, 123-127 wedge, 38 Water gaps, 47-50 Hersey Formation, 290 Subduction complexes, ancient, 65-69 Weathering, 75 Leighton Formation, 290 Sudbury Igneous Complex, 323-326 Whaleback anticline, 57 Madrid Formation, 249-255 Sudbury structure, 323-326 Willimantic fault, 169-173 Smalls Falls Formation, 249-255 Supracrustal rocks, 333-336 Zenoliths, emery, 134-136

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