A geological inquiry respecting the water-bearing strata of the country around London, with reference especially to the water-supply of the metropolis |
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... LOWER GREENSANDS WOULD PROBABLY RISE AT LONDON • $ 16. ON THE PROBABLE ... TERTIARY AND CRETACEOUS DIS- TRICTS OF THE NORTH OF FRANCE . APPENDIX B. ON SPRINGS ARISING FROM FAULTS , AND ON THEIR ANALOGY TO AR- TESIAN WELLS 212 • APPENDIX C. ON ...
... LOWER GREENSANDS WOULD PROBABLY RISE AT LONDON • $ 16. ON THE PROBABLE ... TERTIARY AND CRETACEOUS DIS- TRICTS OF THE NORTH OF FRANCE . APPENDIX B. ON SPRINGS ARISING FROM FAULTS , AND ON THEIR ANALOGY TO AR- TESIAN WELLS 212 • APPENDIX C. ON ...
Page 11
... Tertiary strata , -beneath which expe- rience has proved the existence of the Chalk ; and induction leads us to presume that beneath that upper member of the Cretaceous series we should find the several lower ... sands , from 300 to 400 feet ...
... Tertiary strata , -beneath which expe- rience has proved the existence of the Chalk ; and induction leads us to presume that beneath that upper member of the Cretaceous series we should find the several lower ... sands , from 300 to 400 feet ...
Page 12
... sands , very variable in their composi- tion and structure , and of a thickness varying from 25 to 130 feet . This group I have temporarily designated merely as the Lower Tertiary Strata . * 11. As the Bagshot Sands do not form a ...
... sands , very variable in their composi- tion and structure , and of a thickness varying from 25 to 130 feet . This group I have temporarily designated merely as the Lower Tertiary Strata . * 11. As the Bagshot Sands do not form a ...
Page 13
Joseph Prestwich. The Lower Tertiary sands and clays beneath the London clay form one of the sources of supply of water to the Arte- sian wells of London and its neighbourhood . They are here from seventy to eighty feet thick , but ...
Joseph Prestwich. The Lower Tertiary sands and clays beneath the London clay form one of the sources of supply of water to the Arte- sian wells of London and its neighbourhood . They are here from seventy to eighty feet thick , but ...
Page 18
... sand and mottled clays beneath it , and c the chalk ; -this latter allowing , however , of the passage of ... Lower Tertiary Strata . 18. HAVING premised thus much as to general geological structure , I proceed to the consideration of the ...
... sand and mottled clays beneath it , and c the chalk ; -this latter allowing , however , of the passage of ... Lower Tertiary Strata . 18. HAVING premised thus much as to general geological structure , I proceed to the consideration of the ...
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Common terms and phrases
alkaline appear arenaceous argillaceous Artesian average Bedfordshire beds beneath London bore Buckinghamshire calcareous Cambridgeshire carbonate of lime carbonic acid chalk marl considerable Cretaceous crop Degousée depth Devizes division Dorking drainage drift escarpment extent fall fault feet thick fissures flow formation France gallons of water Gault geological Godstone grains gravel green Grenelle ground Guildford height hills impermeable inches iron Kent lithological character London clay Lower Greensand Lower Tertiary sands Lower Tertiary strata mass Merstham mineral mottled clays nearly neighbourhood North Downs observations Oolite outcrop Oxfordshire Paris pass permeable portion probably proportion quantity of water rain rain-fall Reigate rise river rocks Saffron Walden salts sections siliceous soluble springs square miles subterranean sunk superficial area supply of water surface Surrey Tertiary district Thames tract traversed underground Upper Greensand valley varies water-bearing deposit water-bearing strata water-level water-supply Watford whilst
Popular passages
Page 164 - DEGREES OF HARDNESS AND DEGREES OF ALKALINITY EXPLAINED. Degrees of Hardness. — Each degree of hardness indicates as much hardness as would be produced by one grain of chalk per gallon held in solution in the form of bicarbonate of lime, free from any excess of carbonic acid. The degree of hardness caused by a lime salt depends, not on the state of combination of the calcium it contains, but on the quantity of the calcium.