The Elements of economic geology

Bibliographic data

Monograph

Identifikator:: 1773832379

URN:: urn:nbn:de:zbw-retromon-172798

Document type:: Monograph

Author:: Gregory, John W. http://d-nb.info/gnd/11683014X

Title:: The Elements of economic geology

Place of publication:: London

Publisher:: Methuen

Year of publication:: 1928

Scope:: XIV, 312 S.; graph. Darst.

Digitisation:: 2021

Collection:: Economics Books

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Index

Document type:: Monograph

Structure type:: Index

Title:: Subject index

Collection:: Economics Books

308 THE ELEMENTS OF ECONOMIC GEOLOGY 168; industrial value of, 168. China clay, 169-73 ; pneumato. Iytic origin’ of, 169 ; price, 173 ; some due to descending solutions, 172-3. Pottery clays, 169. Fire clay, 169, Coal and its classification, 259-72 annual output of, 272; anthra cite, 261, 264-5, 268, 271-2; arti ficial coal and its evidence, 271 black or bituminous coal 261, 263-4, 271; calorific value from analysis, 259; cannel, 265-6; chemical classification, 267-8 ; coking, cause of, 264 ; coking index, 264 ; constitution of, 260 - definition of, 260 ; graphite, 265 humic, 260-5 ; lignite or brown. 261, 262-3; origin of, 267, 268 70; peat, 261 ; resources, 272-4 ; sapropelic coals, 260, 261, 263-6, 294; seams, carbon enrichment in, 270-1; ‘wood, composition, 201. Coast defence, 245-8 ; beach mate rial, transport of, 241; broads formation of, 245; coastal ac. cretion, 242-4; continental shelf, 241; estuary works and models, 248; estuaries, silting of, 244 i groynes, 246; marine abrasion, rate of, 241, 242 ; planting, 245 ; recession of the land, 240; sea- walls, 247 ; silt jetties, 245 ; spit formation, 243 ; ‘subaerial erosion 242 ; warping, 244. Waves, 238- 40; depth of, 239 ; force of, 240; height and fetch, 239-40. Cobalt, 5, 110-12, Colours of gold, 5. Contact ores, 85, 102, 132. Contra-lodes, g. Copper, price, 80, 81; qualities of, 80; British yield of, 80 ; ores of, 80-95; bedded or sedimentary, 93-5; Classification of, 81-2: contact, 85; Cornish lodes, 84 dissemination ores, 85 ; distribu: tion of, 81; lodes, 21, 29; pipe lodes, 85; pneumatolytic lodes, 82-4 ; primary lodes, 81, 82-90: pyritic masses, 86-go, 134; re placements, 85-90, 94; secon: dary ores, go-3; secondary en- richments, 84, 90-2; in volcanic rocks, 83-4, 94. Coprolites, 203. Corundum group, 165-7. Costeaning, 6. Country, term defined, 7. Cross-course lodes, 9, 100. Crustified lodes, 11, gg. DEEP leads, 53-7. Depth of ore formation, 28, 36, 38 42, 43, 45, 63, 70, 73, 83, 84, 95 97, 100, 102, 105, 112, 124, 126. 127, 137. Diamond, the, 161-5 ; distribution, 161-3; formation of, 163-4; kimberlite, 162 ; mineral associa- tion, 162; penumatolytic, 162, 164 ; production, 162; theories of formation based on alleged artificial diamonds, 164. Dredging, 53-4. Dumb-wells, 22g. EARTH, structure of, 16. Earthquakes and anti-earthquake construction, 248-58; action, nature of, 249; anti-earthquake construction, 253-8; anti-earth- quake building design, 254-7 ; submarine cables broken by earth slips, 251; causes of earthquakes, 251; depth of, 250; determina- tion of origin, 249-50; economic seismology, 252-8 ; epicentrum, 249; foundations, loose #. firm, 254-5; homoseists, 249; iso- seists, 249; landslips, 251; la- teral movement, effects of, 255; level of greatest damage, 257 ; prediction of and its value, 252 ; probability, 252; source and cause, 251; suitability of mate- rials, 257-8; Tokyo, of 1923, 253. Efflorescent minerals, 30; iron ores, 147. Emborroscado, 28. Emerald, 166 ; ural emerald, 167. Engineering geology, 219-58.

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