Introductory Text-book of Geology |
From inside the book
Results 1-5 of 22
Page 21
... silicious ( silex , flint ) , or contain flint ; while others give off sulphureous vapours , and various mineral admixtures . Such springs act chemically in dissolving and redepositing mineral matter ; and they AQUEOUS AGENCY . 21.
... silicious ( silex , flint ) , or contain flint ; while others give off sulphureous vapours , and various mineral admixtures . Such springs act chemically in dissolving and redepositing mineral matter ; and they AQUEOUS AGENCY . 21.
Page 26
... silicious or flinty accumulations take place in lakes , marshes , and fresh - water estuaries through the growth and decay of microscopic forms ( the diatoms ) whose tiny frustules constitute beds of earthy matter ( microphytal earths ...
... silicious or flinty accumulations take place in lakes , marshes , and fresh - water estuaries through the growth and decay of microscopic forms ( the diatoms ) whose tiny frustules constitute beds of earthy matter ( microphytal earths ...
Page 28
... silicious incrustations ( silicious - sinter ) , or permeating loose material , and binding them together with a hard flinty cement . Clay or alumina , sulphur , and other mineral matters , are also deposited largely from springs , or ...
... silicious incrustations ( silicious - sinter ) , or permeating loose material , and binding them together with a hard flinty cement . Clay or alumina , sulphur , and other mineral matters , are also deposited largely from springs , or ...
Page 41
... the fragments of the harder and more silicious or flinty rocks . Shingle is the geological term for water - worn rock - fragments larger and с less rounded than those of gravel . Shingle - beaches ROCKS AND MINERALS . 41.
... the fragments of the harder and more silicious or flinty rocks . Shingle is the geological term for water - worn rock - fragments larger and с less rounded than those of gravel . Shingle - beaches ROCKS AND MINERALS . 41.
Page 42
... silicious particles . It is usually tough and plastic , and differs from mud in this respect as well as in the absence of vegetable and animal matter . Fire - clay and Fullers ' - earth are varieties of clay - the former , from the ...
... silicious particles . It is usually tough and plastic , and differs from mud in this respect as well as in the absence of vegetable and animal matter . Fire - clay and Fullers ' - earth are varieties of clay - the former , from the ...
Common terms and phrases
abundant accumulations ADVANCED TEXT-BOOK argillaceous arranged basalt beds bituminous boulders calcareous Cambrian carboniferous chalk chemical chiefly clay-slate clays coal coal-measures coloured compact composed composition conglomerates coral-reefs corals cretaceous Crown 8vo crust crustacea crystalline deposits Devonian districts drift earth Edition encrinites England eocene epoch estuaries existing felspar fishes flagstones formation forms fossils fresh-water geologists Geology globe gneiss granite gravel Greensand greenstone grits groups igneous rocks interstratified islands lakes laminated land Laurentian lava layers lias lignite lime lower magnesian marine marls masses Mesozoic metamorphic mica mica-schist mineral miocene mountain limestone numerous occur ocean Old Red Sandstone oolite origin PALEOZOIC peculiar period Permian PHYSICAL GEOGRAPHY plants and animals Pliocene POST-TERTIARY present quartz remains of plants reptiles rivers rocky sand schists Scotland seas sedimentary shales shell-fish shells shores silicious silt Silurian slates slaty species stone strata stratified rocks structure term tertiary texture thickness tion Triassic upper variety vegetable veins volcanic Wealden
Popular passages
Page 1 - By Anthony Trollope. TACITUS. By WB Donne. CICERO. By the Editor. PLINY'S LETTERS. By the Rev. Alfred Church, MA, and the Rev. WJ Brodribb, MA LIVY. By the Editor. OVID. By the Rev. A. Church. MA CATULLUS, TIBULLUS, AND PROPERTIUS.
Page 5 - NICHOLSON. A Manual of Zoology, for the use of Students. With a General Introduction on the Principles of Zoology. By HENRY ALLEYNE NICHOLSON, MD, D.Sc., FLS, FGS, Regius Professor of Natural History in the University of Aberdeen.