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[blocks in formation]
[blocks in formation]

FIG.

LIST OF ILLUSTRATIONS

1. Weathering of rock, as shown by old masonry. (The "falsebedding" and other original structures of the stone are revealed by weathering)

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[blocks in formation]

7. Erosion of limestone by the solvent action of a peaty stream, Durness, Sutherlandshire

25

8. Pot-holes worn out by the gyration of stones in the bed of a stream 9. Grand Cañon of the Colorado

30

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10. Gullies torn out of the side of a mountain by descending torrents,

with cones of detritus at their base

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11. Flat stones in a bank of river-shingle, showing the direction of the current that transported and left them

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12. Section of alluvium showing direction of currents

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13. River-terraces

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14. Alluvial terraces on the side of an emptied reservoir

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15. Parallel roads of Glen Roy.

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16. Stages in the filling up of a lake.

45

17. Piece of shell-marl containing shells of Limnæa peregra

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18. View of Axmouth landslip as it appeared in April 1885.

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19. Section of cavern with stalactites and stalagmite

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20. Section showing successive layers of growth in a stalactite

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21. Travertine with impressions of leaves

58

22. Glaciers and moraines

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23. Perched blocks scattered over ice-worn surface of rock

64

:

24. Stone smoothed and striated by glacier-ice

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