Abich, on a new variety of feldspar446Abrolhos islands415Absence of recent formations on the S. American coasts409Aguerros on elevation of Imperial305Albite, constituent mineral in andesite446—— in rocks of Tierra del Fuego427—— in porphyries444—— crystals of, with orthite447Alison, Mr., on elevation of Valparaiso307,310Alumina, sulphate of439Ammonites from Concepcion400,405Amolanas, Las493Amygdaloid, curious varieties of444Amygdaloids of the Uspallata range471—— of Copiapo498Andesite of Chile446—— in the valley of Maypu449,450—— of the Cumbre pass460,466—— of the Uspallata range475—— of Los Hornos480—— of Copiapo488,491Anhydrite, concretions of450,463Araucaria, silicified wood of394,474Arica, elevation of323Arqueros, mines of481Ascension, gypsum deposited on328—— laminated volcanic rocks of439,440Augite in fragments, in gneiss414—— with albite, in lava347Austin, Mr. R. A. C., on bent cleavage lamina434Austin, Captain, on sea-bottom302Australia, foliated rocks of438Azara labiata, beds of, at San Pedro277,352Baculites vagina400Bahia Blanca, elevation of280—— formations near355—— character of living shells of408Bahia (Brazil), elevation near280—— crystalline rocks of414Ballard, M., on the precipitation of sulphate of soda349Banda Oriental, tertiary formations of365—— crystalline rocks of418Barnacles above sea-level311—— adhering to upraised shells306Basalt of S. Cruz389—— streams of, in the Portillo range456—— in the Uspallata range472Basin chains of Chile333Beagle Channel427,430Beaumont, Elie de, on inclination of lava-streams390,457—— on viscid quartz-rocks475Beech-tree, leaves of fossil391Beechey, Captain, on sea-bottom299Belcher, Lieutenant, on elevated shells from Concepcion306Bella Vista, plain of325Benza, Dr., on decomposed granite417Bettington, Mr., on quadrupeds transported by rivers374Blake, Mr., on the decay of elevated shells near Iquique322—— on nitrate of soda346Bole444Bollaert, Mr., on mines of Iquique503Bones, silicified402—— fossil, fresh condition of366Bottom of sea off Patagonia292,298Bougainville, on elevation of the Falkland islands290Boulder formation of S. Cruz285,295—— of Falkland islands290—— anterior to certain extinct quadrupeds371—— of Tierra del Fuego391Boulders in the Cordillera339,341—— transported by earthquake-waves344—— in fine-grained tertiary deposits401Brande, Mr., on a mineral spring461Bravais, M., on elevation of Scandinavia320Brazil, elevation of279—— crystalline rocks of414,418Broderip, Mr., on elevated shells from Concepcion306Brown, Mr. R., on silicified wood of Uspallata range474Brown, on silicified wood495Bucalema, elevated shells near307Buch, Von, on cleavage438—— on cretaceous fossils of the Cordillera453,465—— on the sulphureous volcanoes of Java509Buenos Ayres352Burchell, Mr., on elevated shells of Brazil279Byron, on elevated shells303Cachapual, boulders in valley of339,341Caldcleugh, Mr., on elevation of Coquimbo314—— on rocks of the Portillo range456Callao, elevation near323—— old town of327Cape of Good Hope, metamorphic rocks of439Carcharias megalodon402Carpenter, Dr., on microscopic organisms352Castro (Chiloe), beds near394Cauquenes Baths, boulders near339,341—— pebbles in porphyry near443—— volcanic formation near447—— stratification near449Caves above sea-level303,307,322Cervus pumilus,fossil-horns of304Chevalier, M., on elevation near Lima323Chile, structure of country between the Cordillera and the Pacific333—— tertiary formations of337—— crystalline rocks in435—— central, geology of441—— northern, geology of479Chiloe, gravel on coast294—— elevation of303—— tertiary formation of337,405—— crystalline rocks of433Chlorite-schist, near M. Video419Chonos archipelago, tertiary formations of393—— crystalline rocks of430Chupat, Rio, scoriæ transported by280Claro, Rio, fossiliferous beds of485Clay-shale of Los Hornos480Clay-slate, formation of, Tierra del Fuego424—— of Concepcion433—— feldspathic, of Chile442,444,448—— —— of the Uspallata range468,470—— black siliceous, band of, in porphyritic formations of Chile445Claystone porphyry, formation of, in Chile442—— origin of445—— eruptive sources of444Cleavage, definition of414—— at Bahia415—— Rio de Janeiro415—— Maldonado418—— Monte Video420—— S. Guitru-gueyu421—— Falkland I.424—— Tierra del Fuego428—— Chonos I.434—— Chiloe435—— Concepcion434—— Chile435—— discussion on436Cleavage-laminæ superficially bent434Cliffs, formation of301Climate, late changes in345—— of Chile during tertiary period408Coal of Concepcion399—— S. Lorenzo504Coast-denudation of St. Helena301Cobija, elevation of322Colombia, cretaceous formation of504Colonia del Sacramiento, elevation of278—— Pampean formation near355Colorado, Rio, gravel of295—— sand-dunes of281,294—— Pampean formation near355Combarbala479,481Concepcion, elevation of305—— deposits of399,405—— crystalline rocks of433Conchalee, gravel-terraces of311Concretions of gypsum, at Iquique345—— in sandstone at S. Cruz387—— in tufaceous tuff of Chiloe387—— in gneiss414—— in claystone-porphyry at Port Desire421—— in gneiss at Valparaiso435—— in metamorphic rocks436—— of anhydrite450—— relations of, to veins473Conglomerate claystone of Chile443,445—— of Tenuyan454,458,478—— of the Cumbre Pass462,466—— of Rio Claro485—— of Copiapo496,499Cook, Captain, on form of sea-bottom300Copiapo, elevation of321—— tertiary formations of403—— secondary formations of489Copper, sulphate of489—— native, at Arqueros482—— mines of, at Panuncillo481—— veins, distribution of505Coquimbo, elevation and terraces of312—— tertiary formations of404—— secondary formations of482Corallines living on pebbles299Cordillera, valleys bordered by gravel fringes337—— basal strata of442—— fossils of453,465,486,487,493,503—— elevation of442,459,474,476,500,502,510,512,517—— gypseous formations of450,452,461,463,479,483,489,491,503—— claystone-porphyries of442—— andesitic rocks of446—— volcanoes of447,511,517Coste, M., on elevation of Lemus303Coy inlet, tertiary formation of390Crassatella Lyellii392Cruickshanks, Mr., on elevation near Lima327Crystals of feldspar, gradual formation of, at Port Desire422Cumbre, Pass of, in Cordillera502Cuming, Mr., on habits of the Mesodesma310—— on range of living shells on west coast407Dana, Mr., on foliated rocks438—— on amygdaloids444Darwin, Mount427D’Aubuisson, on concretions397—— on foliated rocks438Decay, gradual, of upraised shells323,327Decomposition of granite rocks417De la Beche, Sir H., his theoretical researches in geology299—— on the action of salt on calcareous rocks327—— on bent cleavage-laminæ434Denudation on coast of Patagonia292,300,409—— great powers of410—— of the Portillo range456,458Deposits, saline344Despoblado, valley of496,497,499Detritus, nature of, in Cordillera338Devonshire, bent cleavage in434Dikes, in gneiss of Brazil414,418—— near Rio de Janeiro417—— pseudo, at Port Desire423—— in Tierra del Fuego426—— in Chonos archipelago, containing quartz432—— near Concepcion, with quartz434—— granitic-porphyritic, at Valparaiso435—— rarely vesicular in Cordillera347—— absent in the central ridges of the Portillo pass452—— of the Portillo range, with grains of quartz456—— intersecting each other often466—— numerous at Copiapo498Domeyko, M., on the silver mines of Coquimbo482—— on the fossils of Coquimbo486D’Orbigny, M. A., on upraised shells of Monte Video278—— on elevated shells at St. Pedro278—— on elevated shells near B. Ayres279—— on elevation of S. Blas281—— on the sudden elevation of La Plata293—— on elevated shells near Cobija322—— on elevated shells near Arica322—— on the climate of Peru324—— on salt deposits of Cobija345—— on crystals of gypsum in salt-lakes349—— on absence of gypsum in the Pampean formation353—— on fossil remains from Bahia Blanca359,360—— on fossil remains from the banks of the Parana362—— on the geology of St. Fé363—— on the age of Pampean formation367,376—— on theMastodon Andium379—— on the geology of the Rio Negro381—— on the character of the Patagonian fossils391—— on fossils from Concepcion399—— —— from Coquimbo404—— —— from Payta405—— on fossil tertiary shells of Chile406—— on cretaceous fossils of Tierra del Fuego426—— —— from the Cordillera of Chile453,465,486,488,493,504Earth, marine origin of304,308Earthenware, fossil326Earthquake, effect of, at S. Maria293—— elevation during, at Lemus303—— of 1822, at Valparaiso310—— effects of, in shattering surface325—— fissures made by325—— probable effects on cleavage325Earthquakes in Pampas290Earthquake-waves, power of, in throwing up shells310—— effects of, near Lima327—— power of, in transporting boulders344Edmonston, Mr., on depths at which shells live at Valparaiso309Ehrenberg, Professor, on infusoria in the Pampean formation355,359,362—— on infusoria in the Patagonian formation383,384,386,391,392Elevation of La Plata278—— Brazil279—— Bahia Blanca280,357—— San Blas281—— Patagonia281,291,293—— Tierra del Fuego288—— Falkland islands290—— Pampas289,377—— Chonos archipelago303—— Chiloe304—— Chile304—— Valparaiso307,310—— Coquimbo312,320—— Guasco320—— Iquique322—— Cobija322—— Lima323—— sudden, at S. Maria293—— —— at Lemus303—— insensible, at Chiloe304—— —— at Valparaiso311—— —— at Coquimbo314—— axes of, at Chiloe398,405—— —— at P. Rumena398,405—— —— at Concepcion398,405—— unfavourable for the accumulation of permanent deposits410—— lines of, parallel to cleavage and foliation416,417,424,428,432,434,438—— lines of, oblique to foliation431—— areas of, causing lines of elevation and cleavage441—— lines of, in the Cordillera442—— slow, in the Portillo range475—— two periods of, in Cordillera of Central Chile476—— of the Uspallata range474—— two periods of, in Cumbre Pass476—— horizontal, in the Cordillera of Copiapo500—— axes of, coincident with volcanic orifices503—— of the Cordillera, summary on510,513,517Elliott, Captain, on human remains279Ensenada, elevated shells of278Entre Rios, geology of363Equus curvidens364,379Epidote in Tierra del Fuego426—— in gneiss435—— frequent in Chile445—— in the Uspallata range475—— in porphyry of Coquimbo482Erman, M., on andesite347Escarpments, recent, of Patagonia301Extinction of fossil mammifers370Falkland islands, elevation of290—— pebbles on coast297,299—— geology of424Falkner, on saline incrustations347Faults, great, in Cordillera461,469Feldspar, earthy, metamorphosis of, at Port Desire422—— albitic347—— crystals of, with albite347—— orthitic, in conglomerate of Tenuyan454—— in granite of Portillo range455—— in porphyries in the Cumbre Pass466Feuillée on sea-level at Coquimbo314Fissures, relations of, to concretions397—— upfilled, at Port Desire424—— in clay-slate470Fitton, Dr., on the geology of Tierra del Fuego427Fitzroy, Captain, on the elevation of the Falkland islands427—— on the elevation of Concepcion305Foliation, definition of414—— of rocks at Bahia414—— Rio de Janeiro415—— Maldonado418—— Monte Video420—— S. Guitru-gueyu421—— Falkland I.424—— Tierra del Fuego427—— Chonos archipelago430—— Chiloe433—— Concepcion434—— Chile435—— discussion on435Forbes, Professor E., on cretaceous fossils of Concepcion400—— on cretaceous fossils and subsidence in Cumbre Pass465—— on fossils from Guasco488—— —— from Coquimbo483,487—— —— from Copiapo493—— on depths at which shells live409,496Formation, Pampean352—— —— area of371—— —— estuary origin373—— tertiary of Entre Rios363—— of Banda Oriental365—— volcanic, in Banda Oriental367—— of Patagonia381—— summary on391—— tertiary of Tierra del Fuego391—— —— of the Chonos archipelago393—— —— of Chiloe394—— —— of Chile394—— —— of Concepcion398,404—— —— of Navidad400—— —— of Coquimbo402—— —— of Peru404—— —— subsidence during402—— volcanic, of Tres Montes393—— —— of Chiloe394—— —— old, near Maldonado418—— —— with laminar structure440—— —— ancient, in Tierra del Fuego426—— recent, absent on S. American coast409—— metamorphic, of claystone-porphyry of Patagonia421,440—— foliation of436—— plutonic, with laminar structure440—— palaeozoic, of the Falkland I.424—— claystone, at Concepcion433—— Jurassic, of Cordillera512—— Neocomian, of the Portillo Pass453—— volcanic, of Cumbre Pass465—— gypseous, of Los Hornos479,487—— —— of Coquimbo482—— —— of Guasco487—— —— of Copiapo
Abich, on a new variety of feldspar446Abrolhos islands415Absence of recent formations on the S. American coasts409Aguerros on elevation of Imperial305Albite, constituent mineral in andesite446—— in rocks of Tierra del Fuego427—— in porphyries444—— crystals of, with orthite447Alison, Mr., on elevation of Valparaiso307,310Alumina, sulphate of439Ammonites from Concepcion400,405Amolanas, Las493Amygdaloid, curious varieties of444Amygdaloids of the Uspallata range471—— of Copiapo498Andesite of Chile446—— in the valley of Maypu449,450—— of the Cumbre pass460,466—— of the Uspallata range475—— of Los Hornos480—— of Copiapo488,491Anhydrite, concretions of450,463Araucaria, silicified wood of394,474Arica, elevation of323Arqueros, mines of481Ascension, gypsum deposited on328—— laminated volcanic rocks of439,440Augite in fragments, in gneiss414—— with albite, in lava347Austin, Mr. R. A. C., on bent cleavage lamina434Austin, Captain, on sea-bottom302Australia, foliated rocks of438Azara labiata, beds of, at San Pedro277,352Baculites vagina400Bahia Blanca, elevation of280—— formations near355—— character of living shells of408Bahia (Brazil), elevation near280—— crystalline rocks of414Ballard, M., on the precipitation of sulphate of soda349Banda Oriental, tertiary formations of365—— crystalline rocks of418Barnacles above sea-level311—— adhering to upraised shells306Basalt of S. Cruz389—— streams of, in the Portillo range456—— in the Uspallata range472Basin chains of Chile333Beagle Channel427,430Beaumont, Elie de, on inclination of lava-streams390,457—— on viscid quartz-rocks475Beech-tree, leaves of fossil391Beechey, Captain, on sea-bottom299Belcher, Lieutenant, on elevated shells from Concepcion306Bella Vista, plain of325Benza, Dr., on decomposed granite417Bettington, Mr., on quadrupeds transported by rivers374Blake, Mr., on the decay of elevated shells near Iquique322—— on nitrate of soda346Bole444Bollaert, Mr., on mines of Iquique503Bones, silicified402—— fossil, fresh condition of366Bottom of sea off Patagonia292,298Bougainville, on elevation of the Falkland islands290Boulder formation of S. Cruz285,295—— of Falkland islands290—— anterior to certain extinct quadrupeds371—— of Tierra del Fuego391Boulders in the Cordillera339,341—— transported by earthquake-waves344—— in fine-grained tertiary deposits401Brande, Mr., on a mineral spring461Bravais, M., on elevation of Scandinavia320Brazil, elevation of279—— crystalline rocks of414,418Broderip, Mr., on elevated shells from Concepcion306Brown, Mr. R., on silicified wood of Uspallata range474Brown, on silicified wood495Bucalema, elevated shells near307Buch, Von, on cleavage438—— on cretaceous fossils of the Cordillera453,465—— on the sulphureous volcanoes of Java509Buenos Ayres352Burchell, Mr., on elevated shells of Brazil279Byron, on elevated shells303Cachapual, boulders in valley of339,341Caldcleugh, Mr., on elevation of Coquimbo314—— on rocks of the Portillo range456Callao, elevation near323—— old town of327Cape of Good Hope, metamorphic rocks of439Carcharias megalodon402Carpenter, Dr., on microscopic organisms352Castro (Chiloe), beds near394Cauquenes Baths, boulders near339,341—— pebbles in porphyry near443—— volcanic formation near447—— stratification near449Caves above sea-level303,307,322Cervus pumilus,fossil-horns of304Chevalier, M., on elevation near Lima323Chile, structure of country between the Cordillera and the Pacific333—— tertiary formations of337—— crystalline rocks in435—— central, geology of441—— northern, geology of479Chiloe, gravel on coast294—— elevation of303—— tertiary formation of337,405—— crystalline rocks of433Chlorite-schist, near M. Video419Chonos archipelago, tertiary formations of393—— crystalline rocks of430Chupat, Rio, scoriæ transported by280Claro, Rio, fossiliferous beds of485Clay-shale of Los Hornos480Clay-slate, formation of, Tierra del Fuego424—— of Concepcion433—— feldspathic, of Chile442,444,448—— —— of the Uspallata range468,470—— black siliceous, band of, in porphyritic formations of Chile445Claystone porphyry, formation of, in Chile442—— origin of445—— eruptive sources of444Cleavage, definition of414—— at Bahia415—— Rio de Janeiro415—— Maldonado418—— Monte Video420—— S. Guitru-gueyu421—— Falkland I.424—— Tierra del Fuego428—— Chonos I.434—— Chiloe435—— Concepcion434—— Chile435—— discussion on436Cleavage-laminæ superficially bent434Cliffs, formation of301Climate, late changes in345—— of Chile during tertiary period408Coal of Concepcion399—— S. Lorenzo504Coast-denudation of St. Helena301Cobija, elevation of322Colombia, cretaceous formation of504Colonia del Sacramiento, elevation of278—— Pampean formation near355Colorado, Rio, gravel of295—— sand-dunes of281,294—— Pampean formation near355Combarbala479,481Concepcion, elevation of305—— deposits of399,405—— crystalline rocks of433Conchalee, gravel-terraces of311Concretions of gypsum, at Iquique345—— in sandstone at S. Cruz387—— in tufaceous tuff of Chiloe387—— in gneiss414—— in claystone-porphyry at Port Desire421—— in gneiss at Valparaiso435—— in metamorphic rocks436—— of anhydrite450—— relations of, to veins473Conglomerate claystone of Chile443,445—— of Tenuyan454,458,478—— of the Cumbre Pass462,466—— of Rio Claro485—— of Copiapo496,499Cook, Captain, on form of sea-bottom300Copiapo, elevation of321—— tertiary formations of403—— secondary formations of489Copper, sulphate of489—— native, at Arqueros482—— mines of, at Panuncillo481—— veins, distribution of505Coquimbo, elevation and terraces of312—— tertiary formations of404—— secondary formations of482Corallines living on pebbles299Cordillera, valleys bordered by gravel fringes337—— basal strata of442—— fossils of453,465,486,487,493,503—— elevation of442,459,474,476,500,502,510,512,517—— gypseous formations of450,452,461,463,479,483,489,491,503—— claystone-porphyries of442—— andesitic rocks of446—— volcanoes of447,511,517Coste, M., on elevation of Lemus303Coy inlet, tertiary formation of390Crassatella Lyellii392Cruickshanks, Mr., on elevation near Lima327Crystals of feldspar, gradual formation of, at Port Desire422Cumbre, Pass of, in Cordillera502Cuming, Mr., on habits of the Mesodesma310—— on range of living shells on west coast407Dana, Mr., on foliated rocks438—— on amygdaloids444Darwin, Mount427D’Aubuisson, on concretions397—— on foliated rocks438Decay, gradual, of upraised shells323,327Decomposition of granite rocks417De la Beche, Sir H., his theoretical researches in geology299—— on the action of salt on calcareous rocks327—— on bent cleavage-laminæ434Denudation on coast of Patagonia292,300,409—— great powers of410—— of the Portillo range456,458Deposits, saline344Despoblado, valley of496,497,499Detritus, nature of, in Cordillera338Devonshire, bent cleavage in434Dikes, in gneiss of Brazil414,418—— near Rio de Janeiro417—— pseudo, at Port Desire423—— in Tierra del Fuego426—— in Chonos archipelago, containing quartz432—— near Concepcion, with quartz434—— granitic-porphyritic, at Valparaiso435—— rarely vesicular in Cordillera347—— absent in the central ridges of the Portillo pass452—— of the Portillo range, with grains of quartz456—— intersecting each other often466—— numerous at Copiapo498Domeyko, M., on the silver mines of Coquimbo482—— on the fossils of Coquimbo486D’Orbigny, M. A., on upraised shells of Monte Video278—— on elevated shells at St. Pedro278—— on elevated shells near B. Ayres279—— on elevation of S. Blas281—— on the sudden elevation of La Plata293—— on elevated shells near Cobija322—— on elevated shells near Arica322—— on the climate of Peru324—— on salt deposits of Cobija345—— on crystals of gypsum in salt-lakes349—— on absence of gypsum in the Pampean formation353—— on fossil remains from Bahia Blanca359,360—— on fossil remains from the banks of the Parana362—— on the geology of St. Fé363—— on the age of Pampean formation367,376—— on theMastodon Andium379—— on the geology of the Rio Negro381—— on the character of the Patagonian fossils391—— on fossils from Concepcion399—— —— from Coquimbo404—— —— from Payta405—— on fossil tertiary shells of Chile406—— on cretaceous fossils of Tierra del Fuego426—— —— from the Cordillera of Chile453,465,486,488,493,504Earth, marine origin of304,308Earthenware, fossil326Earthquake, effect of, at S. Maria293—— elevation during, at Lemus303—— of 1822, at Valparaiso310—— effects of, in shattering surface325—— fissures made by325—— probable effects on cleavage325Earthquakes in Pampas290Earthquake-waves, power of, in throwing up shells310—— effects of, near Lima327—— power of, in transporting boulders344Edmonston, Mr., on depths at which shells live at Valparaiso309Ehrenberg, Professor, on infusoria in the Pampean formation355,359,362—— on infusoria in the Patagonian formation383,384,386,391,392Elevation of La Plata278—— Brazil279—— Bahia Blanca280,357—— San Blas281—— Patagonia281,291,293—— Tierra del Fuego288—— Falkland islands290—— Pampas289,377—— Chonos archipelago303—— Chiloe304—— Chile304—— Valparaiso307,310—— Coquimbo312,320—— Guasco320—— Iquique322—— Cobija322—— Lima323—— sudden, at S. Maria293—— —— at Lemus303—— insensible, at Chiloe304—— —— at Valparaiso311—— —— at Coquimbo314—— axes of, at Chiloe398,405—— —— at P. Rumena398,405—— —— at Concepcion398,405—— unfavourable for the accumulation of permanent deposits410—— lines of, parallel to cleavage and foliation416,417,424,428,432,434,438—— lines of, oblique to foliation431—— areas of, causing lines of elevation and cleavage441—— lines of, in the Cordillera442—— slow, in the Portillo range475—— two periods of, in Cordillera of Central Chile476—— of the Uspallata range474—— two periods of, in Cumbre Pass476—— horizontal, in the Cordillera of Copiapo500—— axes of, coincident with volcanic orifices503—— of the Cordillera, summary on510,513,517Elliott, Captain, on human remains279Ensenada, elevated shells of278Entre Rios, geology of363Equus curvidens364,379Epidote in Tierra del Fuego426—— in gneiss435—— frequent in Chile445—— in the Uspallata range475—— in porphyry of Coquimbo482Erman, M., on andesite347Escarpments, recent, of Patagonia301Extinction of fossil mammifers370Falkland islands, elevation of290—— pebbles on coast297,299—— geology of424Falkner, on saline incrustations347Faults, great, in Cordillera461,469Feldspar, earthy, metamorphosis of, at Port Desire422—— albitic347—— crystals of, with albite347—— orthitic, in conglomerate of Tenuyan454—— in granite of Portillo range455—— in porphyries in the Cumbre Pass466Feuillée on sea-level at Coquimbo314Fissures, relations of, to concretions397—— upfilled, at Port Desire424—— in clay-slate470Fitton, Dr., on the geology of Tierra del Fuego427Fitzroy, Captain, on the elevation of the Falkland islands427—— on the elevation of Concepcion305Foliation, definition of414—— of rocks at Bahia414—— Rio de Janeiro415—— Maldonado418—— Monte Video420—— S. Guitru-gueyu421—— Falkland I.424—— Tierra del Fuego427—— Chonos archipelago430—— Chiloe433—— Concepcion434—— Chile435—— discussion on435Forbes, Professor E., on cretaceous fossils of Concepcion400—— on cretaceous fossils and subsidence in Cumbre Pass465—— on fossils from Guasco488—— —— from Coquimbo483,487—— —— from Copiapo493—— on depths at which shells live409,496Formation, Pampean352—— —— area of371—— —— estuary origin373—— tertiary of Entre Rios363—— of Banda Oriental365—— volcanic, in Banda Oriental367—— of Patagonia381—— summary on391—— tertiary of Tierra del Fuego391—— —— of the Chonos archipelago393—— —— of Chiloe394—— —— of Chile394—— —— of Concepcion398,404—— —— of Navidad400—— —— of Coquimbo402—— —— of Peru404—— —— subsidence during402—— volcanic, of Tres Montes393—— —— of Chiloe394—— —— old, near Maldonado418—— —— with laminar structure440—— —— ancient, in Tierra del Fuego426—— recent, absent on S. American coast409—— metamorphic, of claystone-porphyry of Patagonia421,440—— foliation of436—— plutonic, with laminar structure440—— palaeozoic, of the Falkland I.424—— claystone, at Concepcion433—— Jurassic, of Cordillera512—— Neocomian, of the Portillo Pass453—— volcanic, of Cumbre Pass465—— gypseous, of Los Hornos479,487—— —— of Coquimbo482—— —— of Guasco487—— —— of Copiapo