Introductory Text-book of GeologyW. Blackwood and Sons, 1869 - 194 strani |
Iz vsebine knjige
Zadetki 1–5 od 22
Stran 14
... texture of the rock , and observing how it has been affected by the weather in the cliffs and ravines , may often avoid the use of a wasting and worthless building - stone ; while his knowledge of geological succession will enable him ...
... texture of the rock , and observing how it has been affected by the weather in the cliffs and ravines , may often avoid the use of a wasting and worthless building - stone ; while his knowledge of geological succession will enable him ...
Stran 34
... Texture of Rocks . 34. Having seen that the crust of the earth is composed of stratified and unstratified rocks , and that these have been fre- quently broken through and displaced by volcanic agency , the student should next acquaint ...
... Texture of Rocks . 34. Having seen that the crust of the earth is composed of stratified and unstratified rocks , and that these have been fre- quently broken through and displaced by volcanic agency , the student should next acquaint ...
Stran 35
... texture like pumice - stone ; vesicular or cellular when full of little cavities like certain kinds of lava ; fibrous when the texture is composed of fibres like asbestos ; and acicular , or needle - shaped ( Lat . acus , a needle ) ...
... texture like pumice - stone ; vesicular or cellular when full of little cavities like certain kinds of lava ; fibrous when the texture is composed of fibres like asbestos ; and acicular , or needle - shaped ( Lat . acus , a needle ) ...
Stran 38
... texture . Talc . - A transparent magnesian mineral resembling mica , but softer , and not elastic . It enters largely into the early slates , called talcose slates or talc - schists . When massive it forms talc - rock . Hornblende ...
... texture . Talc . - A transparent magnesian mineral resembling mica , but softer , and not elastic . It enters largely into the early slates , called talcose slates or talc - schists . When massive it forms talc - rock . Hornblende ...
Stran 40
... texture of rocks , whether of aqueous or of igneous origin , are distinguished by a variety of terms expressive of their appearance as they occur in the crust , or when broken up by the hammer . Thus the layers of the strati- fied rocks ...
... texture of rocks , whether of aqueous or of igneous origin , are distinguished by a variety of terms expressive of their appearance as they occur in the crust , or when broken up by the hammer . Thus the layers of the strati- fied rocks ...
Pogosti izrazi in povedi
abundant accumulations agency aqueous arrangement ATLAS basalt beds bituminous boulders building-stone calcareous Cambrian carboniferous chalk chemical chiefly clay clay-slate coal coal-measures coloured compact composed composition conglomerates coral-reefs corals cretaceous crust crustacea crystalline deposits districts drift earth Edition encrinites England eocene epoch estuaries existing felspar fishes formation forms fossils frequent fresh-water GEOGRAPHY geologists Geology globe gneiss granite gravel greenstone grits groups igneous rocks interstratified islands lakes laminated land Laurentian lava layers less lias lignite lime limestone lower marine marls masses Mesozoic Metamorphic mica mica-schist mineral mountain limestone numerous occur ocean Old Red Sandstone oolite origin PALEOZOIC peculiar period Permian plants and animals present quartz remains of plants reptiles rivers rocky sand schists Scotland seams seas sedimentary shales shell-fish shells silicious silt Silurian slates slaty species stone strata stratified rocks structure surface termed tertiary TEXT-BOOK texture thick tion trap trappean Triassic upheavals upper vegetable volcanic wealden zoophytes
Priljubljeni odlomki
Stran 193 - The Geological Examinator. A Progressive Series of Questions, adapted to the Introductory and Advanced TextBooks of Geology. Prepared to assist Teachers in framing their Examinations, and Students in testing their own Progress and Proficiency. By the SAME.
Stran 197 - A New and Enlarged Edition. Constructed from the best materials, and embodying the results of the most recent investigations, accompanied by a complete INDEX OF PLACES, in which the proper quantities are given by T.
Stran 193 - It has not been our good fortune to examine a text-book on science of which we could express an opinion so entirely favourable as we are enabled to do of Mr Page's little work."— Athenceum., ADVANCED TEXT-BOOK OF GEOLOGY, DESCRIPTIVE AND INDUSTRIAL.
Stran 197 - ATLAS OF PHYSICAL GEOGRAPHY, illustrating, in a Series of Original Designs, the Elementary Facts of GEOLOGY, HYDROGRAPHY, METEOROLOGY, and NATURAL HISTORY.
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Stran 193 - Of singular merit for its clearness and trustworthy character." — Standard. Third Edition, Enlarged. GEOLOGY FOR GENERAL READERS. A Series of Popular Sketches in Geology and Palaeontology. By the Surne. 6s. "This is one of the best of Mr page's many good books. It is written in a flowing, popular style. Without illustration or any extraneous aid, the narrative must prove attractive to any intelligent reader."— Geological Magazine.
Stran 193 - The divisions of the subject are so clearly defined, the explanations are so lucid, the relations of one portion of the subject to another are so satisfactorily shown, and, above all, the...