Geological Magazine, Volume 6; Volume 56Henry Woodward Cambridge University Press, 1919 - Geology |
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... Crystals of Zircon , Great Gransden Crystals of Rutile , Great Gransden Map of Drake's Island , Plymouth Quartz grains , Parish Sand - pit , Aspley Guise Sphene , Aspley Guise Kyanite Crystals , near Woburn Isoseismal lines and ...
... Crystals of Zircon , Great Gransden Crystals of Rutile , Great Gransden Map of Drake's Island , Plymouth Quartz grains , Parish Sand - pit , Aspley Guise Sphene , Aspley Guise Kyanite Crystals , near Woburn Isoseismal lines and ...
Page 12
... crystal structure . During the period under review , indeed , the great problem which has exercised the minds of ... crystals into groups or systems , each distinguished from the others by the optical characters of its members , is ...
... crystal structure . During the period under review , indeed , the great problem which has exercised the minds of ... crystals into groups or systems , each distinguished from the others by the optical characters of its members , is ...
Page 13
... crystals could be divided into the same seven systems into which they had been grouped by the consideration of crystal - symmetry . Since the publication of Bravais ' memoir crystallographers have realized that crystals can be divided ...
... crystals could be divided into the same seven systems into which they had been grouped by the consideration of crystal - symmetry . Since the publication of Bravais ' memoir crystallographers have realized that crystals can be divided ...
Page 14
... crystals into these classes is of comparatively recent date ; for although prominence is given to it in Miers ' Mineralogy , published in 1902 , and in Lewis , Crystallography , published in 1899 , it is not taken into account in Story ...
... crystals into these classes is of comparatively recent date ; for although prominence is given to it in Miers ' Mineralogy , published in 1902 , and in Lewis , Crystallography , published in 1899 , it is not taken into account in Story ...
Page 15
... crystals showed spots of maximum effect which were distributed in accordance with the symmetry of the crystal . In ... crystals of many minerals . In crystals of common salt , for example , the experimental data indicate that the ...
... crystals showed spots of maximum effect which were distributed in accordance with the symmetry of the crystal . In ... crystals of many minerals . In crystals of common salt , for example , the experimental data indicate that the ...
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Common terms and phrases
abundant Adorals Ammonites Ammonoids anhydrite appear bands beds Brachiopods breccias British calcareous calcite Cambrian Carboniferous cent Chalk character clay coal Coal-measures connexion contain Conulus Corwen Cretaceous crystals deposits described Devonian diabase district dolomitic dorsal Durham earthquake epidiorite evidence fault fauna feet felspar flint formation fossils fragments gabbro genera genus Geol GEOLOGICAL MAGAZINE Geological Survey geologists glacial gneiss grains granite gravels hornblende hornfels igneous rocks intrusion ironstone Journ later Lower magma Magnesian Limestone material Megacystis miles mineral Museum North occur oolitic origin outcrop paper periproct peristome Permian plates posterior potash present probably Pyrina pyroxene quarry quartz reef regarded sand Sandstone schists septa septum shales shell side silica similar siphuncle species specimens strata structure suggested surface Surv suture suture-line thickness tourmaline Trechmann Trilobites tuff Upper valley ventral volcanic Walcott zone