Proceedings of the American Academy of Arts and Sciences, Volumen60Metcalf and Company, 1925 Vol. 12 (from May 1876 to May 1877) includes: Researches in telephony / by A. Graham Bell. |
Dentro del libro
Resultados 1-5 de 12
Página 16
... phenocrysts of feldspar ; they may be called the Southwest Bay group of flows . 6. A broad flow from the southern flank of South Gannet cone , measuring about 1.5 kilometers in length , as well as in width . It vies with the Porpoise ...
... phenocrysts of feldspar ; they may be called the Southwest Bay group of flows . 6. A broad flow from the southern flank of South Gannet cone , measuring about 1.5 kilometers in length , as well as in width . It vies with the Porpoise ...
Página 23
... phenocrysts of feldspar . Fluidal banding is not conspicuous , but the dome structure is clearly indicated by the presence of a pronounced , concentric rifting ; the plates dip away on all sides from the top of the dome , the angle of ...
... phenocrysts of feldspar . Fluidal banding is not conspicuous , but the dome structure is clearly indicated by the presence of a pronounced , concentric rifting ; the plates dip away on all sides from the top of the dome , the angle of ...
Página 43
... phenocrysts of feldspar , reaching eight millimeters in length , are em- bedded in the compact base , which is moderately vesicular . Under the microscope the phenocrystic feldspar is seen to be acid bytownite , Ab25 An75 . Olivines ...
... phenocrysts of feldspar , reaching eight millimeters in length , are em- bedded in the compact base , which is moderately vesicular . Under the microscope the phenocrystic feldspar is seen to be acid bytownite , Ab25 An75 . Olivines ...
Página 44
... phenocrysts of feldspar , up to 5 millimeters in diameter , break the monotonous , trappean surface . The phenocrysts are : bytownite , in some cases faintly zoned , with a medium labradorite on the exterior ; and colorless , generally ...
... phenocrysts of feldspar , up to 5 millimeters in diameter , break the monotonous , trappean surface . The phenocrysts are : bytownite , in some cases faintly zoned , with a medium labradorite on the exterior ; and colorless , generally ...
Página 45
... phenocrysts of bytown- ite . Other rare phenocrysts of augite in stout prisms reaching one millimeter in length , are seen under the microscope . The groundmass is a composite of labradorite , very pale , greenish augites , magnetite ...
... phenocrysts of bytown- ite . Other rare phenocrysts of augite in stout prisms reaching one millimeter in length , are seen under the microscope . The groundmass is a composite of labradorite , very pale , greenish augites , magnetite ...
Otras ediciones - Ver todas
Términos y frases comunes
ACAD Academy aegirite AMER amphibole analysis andesite angle apparatus Ascension Ascension Island atomic augite average axial axis basaltic bath Boston bulb caesium Cambridge coil column compensating cone copper correction crater Cross Hill crystal curve cylinder deflection determined diameter Diopside direction effect electrical equations error experimental field Figure filter frequency germanium glass Green Mountain Hill dome island latent heat lava linear compressibility liquid longitudinal magma magnetic magnetometer measurements melting metals meters method nearly nickel observed obtained olivine parallel phenocrysts Phys Plate plug position pressure coefficient probably quartz ratio Reinisch Riding School riebeckite rock rotation rotor rubidium Saint Helena slope Southeast Head specific resistance specimen steel surface Table temperature coefficient tension thermal thermometer tion trachyandesite trachydolerite trachyte transverse tube tuff values velocity vertical volume Weather Post White Hill wire xenoliths zero zooxanthellae