Scientific Reports: Geography, physiography, glaciology, oceanography and geology ..., Volumes 2-31922 - Geology |
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Page 2
... Sponge - spicules and Radiolaria . Thereafter samples were taken at frequent intervals in the extended voyage ... Sponges was found ( Sample LXI ) . The THIRD ANTARCTIC CRUISE occupied the summer of 1913-14 . The samples commence with a ...
... Sponge - spicules and Radiolaria . Thereafter samples were taken at frequent intervals in the extended voyage ... Sponges was found ( Sample LXI ) . The THIRD ANTARCTIC CRUISE occupied the summer of 1913-14 . The samples commence with a ...
Page 4
... sponge spicules and Diatoms . Terrigenous mud ( grey - greet- Polyzoa , pebbies , & c . Green sandy mud with few pebbles , igneous rock . Green mud with sponge spicules . Quartz pebble encrusted with iron . Globigerina ooze ( pale ...
... sponge spicules and Diatoms . Terrigenous mud ( grey - greet- Polyzoa , pebbies , & c . Green sandy mud with few pebbles , igneous rock . Green mud with sponge spicules . Quartz pebble encrusted with iron . Globigerina ooze ( pale ...
Page 5
... . Percentage . Siliceous Organisms . Fine Washings . 91.2 Sponge - spicules and a few Radiolaria ... Chiefly sand ( terrigenous ) . II . Date . - 6th January , 1912 . SEA - FLOOR DEPOSITS FROM SOUNDINGS - CHAPMAN . 5.
... . Percentage . Siliceous Organisms . Fine Washings . 91.2 Sponge - spicules and a few Radiolaria ... Chiefly sand ( terrigenous ) . II . Date . - 6th January , 1912 . SEA - FLOOR DEPOSITS FROM SOUNDINGS - CHAPMAN . 5.
Page 6
... Sponge - spicules abundant . A Diatoms , Sponge - spicules few Radiolaria . Occasional arenaceous ] isomorphs of porcellaneous Foraminifera ( Miliolina ) , upon which strong HC1 has no effect . Also Rhabdammina , Pelosina , Reophax and ...
... Sponge - spicules abundant . A Diatoms , Sponge - spicules few Radiolaria . Occasional arenaceous ] isomorphs of porcellaneous Foraminifera ( Miliolina ) , upon which strong HC1 has no effect . Also Rhabdammina , Pelosina , Reophax and ...
Page 7
... Sponge- diolaria , Diatoms and Sponge - spicules . spicules . VI . Date . 23rd January , 1912 . Position . - Lat . 65 ° 28 ′ S. Long . 132 ° 30 ′ E. Depth . - 156 fathoms . Description . - Spicular Mud and Sand . Composition ...
... Sponge- diolaria , Diatoms and Sponge - spicules . spicules . VI . Date . 23rd January , 1912 . Position . - Lat . 65 ° 28 ′ S. Long . 132 ° 30 ′ E. Depth . - 156 fathoms . Description . - Spicular Mud and Sand . Composition ...
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Common terms and phrases
35 diam abundant Adelie Land aggregates alteration amphibolite Antarctic apatite appears areas augite Aurora Peak bands basic biotite bottom calcite Cape Denison Cape Gray Cape Pigeon Rocks character charnockite chemical chlorite clear felspar colourless constituents cordierite crystalline schists cyanite developed diablastic Diatoms dolerite dredge dyke series epi zone epidote evidence extinction fathoms felspar foliation Foraminifera gabbro Garnet Point Globigerina gneiss gneissic grains granite granoblastic granodiorite granodiorite gneiss granular granulitic green Grubenmann hand specimen hornblende hypersthene igneous rocks ilmenite inclusions intergrowth junction kata zone large crystals lawsonite Macquarie Island Madigan Nunatak magma magnetite meso zone meta-xenoliths metamorphic differentiation metamorphic diffusion metamorphosed mica moraines ooze orthoclase percentage plagioclase plagioclase pyroxene gneiss Plate pleochroic porphyroblasts primary produced pyroxene quartz Radiolaria recrystallisation saussurite saussuritised schistosity schists serpentine shows Siliceous Organisms species sphene spicules Sponge-spicules Stillwell Island structure surface terrigenous mud trawl xenoliths zone metamorphism
Popular passages
Page 74 - ... of the phase of the tidal constituent behind the phase of the corresponding equilibrium constituent at Greenwich (presupposed that Greenwich-time is used everywhere).
Page 111 - Intermingling of basic magmas with acid magma. 2. Differentiation of an intermediate magma into a relatively basic portion and a relatively acid portion. 3. Local melting or refusion in situ. 4. Gradual assimilation of pre-existing basic sediments by invading granite or gneiss.
Page 91 - As portions of the rock forming the walls or roof of the batholith, which had fallen into the granite magma and had partaken of its subsequent movements. (3) As fragments of intrusive masses, dykes, stocks, etc. A careful study of all parts of the area has failed to furnish any evidence that the first is the true explanation anywhere. There is positive proof that the second is the correct and only explanation of the inclusions in several parts of the...
Page 95 - In places, lumps of these amphibolites are seen, streaked out at their margins, and providing a clear explanation of the dark bands throughout the gneiss.
Page 193 - A thermo-dynamical explanation has also been given of the principle that the bounding surface between a crystal and its saturated solution tends to become a minimum, so that equilibrium is only finally reached when all the small crystals have united to form a single crystal.
Page 95 - The details of such an igneous invasion are worthy of careful study, since only in this way can we follow out the progress of subcrustal fusion. We see the highly metamorphosed material further attacked by the great cauldrons under it, and becoming seamed with intersecting veins. Block after block has been caught, as it were, in the act of foundering into the depths. In the gradual absorption of these blocks, and their penetration by insidious streaks of granite, we see pictured on a few square yards...
Page 83 - II. 6 as forming the ancient platform on which the central part of South Victoria Land is built. The foot-hills of the Royal Society Range and the lower portions of the Cathedral Rocks are composed of this class of rock. (ii) The Granites have been encountered at the north end of the Royal Society Range, where they rest upon gneisses, and dykes of granite pierce the gneissic series.
Page 182 - ... that the charnockites are really metamorphic rocks? It behoves us to critically examine the evidence" (Stillwell, p. 192). I must refer to Stillwell's paper regarding his critical examination (p. 193), of which much refers to the linear arrangement of the constituent minerals. He concludes as follows: "Holland's interpretation of the foliation and banding has produced the chief difficulty in the determination of the charnockites as metamorphic rocks. If this difficulty be removed there is no...
Page 193 - It is always the larger crystals that absorb the smaller." " Whether the metal in which such recrystallisation takes place is homogeneous or heterogeneous, diffusion must occur in order that rearrangement may come about. The effect has been explained by the principle that small crystals have a greater solubility than large, so that if small and large crystals of the same substance are both in...
Page 182 - ... the ABC Factory, Central Tilba, contains an interesting segregation vein, about six inches in width, on each side of which the monzonite gradually becomes darker in colour, thus resembling the "black" variety of monzonite. Orthoclase crystals, three centimetres in length, and showing simple twinning, are arranged with their long axes at right angles to the direction of the vein, and show lustre-mottling due to the poikilitic arrangement of the inclusions of augite and biotite. In thin section,...