GEOLOGICAL SKETCHES

AT HOME AND ABROAD



BY


ARCHIBALD GEIKIE, LL.D., F.R.S.,

DIRECTOR-GENERAL OF THE GEOLOGICAL SURVEYS OF THE
UNITED KINGDOM



NEW YORK

MACMILLAN AND CO.

1882
Galaxy m51


332 pages, illustrated with 29 figures.

This electronic edition prepared by Dr. David C. Bossard
from a volume in his personal library.

February, 2006.

Copyright © 2006 by Dr. David C. Bossard.  All rights reserved.





CONTENTS.

PREFACE iii  iii

I. MY FIRST GEOLOGICAL EXCURSION  1  001  002  003  004  005  006  007  008  009  010  011  012  013  014  015  016  017  018  019  020  021

[011] Such was my first geological excursion -- a simple event enough, and yet the turning-point in a life.  Thenceforward the rocks and their fossil treasures formed the chief subject of my every-day thoughts. That day stamped my fate, and I became a geologist.

II. "THE OLD MAN OF HOY"  22  022  023  024  025  026  027  028  029  030  031  032  033  034  035  036  037  038  039

III. THE BARON'S STONE OF K1LLOCHAN  40   040  041  042  043  044  045  046  047  048  049  050  051  052  053  054  055  056  057  058

IV. TIE COLLIERS OF CARRICK  59  059  060  061  062  063  064  065  066  067  068  069  070  071  072  073

V. AMONG THE VOLCANOES OF CENTRAL FRANCE  74  074  075  076  077  078  079  080  081  082  083  084  085  086  087  088  089  090  091  092  093  094  095  096  097  098  099  100  101  102  103  104  105  106  107  108

VI. THE OLD GLACIERS OF NORWAY AND SCOTLAND  109  109  110  111  112  113  114  115  116  117  118  119  120  121  122  123  124  125  126  127  128  129  130  131  132  133  134  135  136  137  138  139  140  141  142  143  144

VII. A FRAGMENT OF PRIMEVAL EUROPE  145  145  146  147  148  149  150  151  152  153  154  155  156  157  158

VIII. ROCK-WEATHERING MEASURED BY THE DECAY OF TOMBSTONES  159  159  160  161  162  163  164  165  166  167  168  169  170  171  172  173  174  175  176  177  178  179

IX. IN WYOMING  180  180  181  182  183  184  185  186  187  188  189  190  191  192  193  194  195  196  197  198  199  200  201  202  203  204  205

X. THE GEYSERS OF THE YELLOWSTONE  206  206  207  208  209  210  211  212  213  214  215  216  217  218  219  220  221  222  223  224  225  226  227  228  229  230  231  232  233  234  235  236  237  238

XI. THE LAVA-FIELDS OF NORTH-WESTERN EUROPE  239  239  240  241  242  243  244  245  246  247  248  249

XII. THE SCOTTISH SCHOOL OF GEOLOGY  250  250  251  252  253  254  255  256  257  258  259  260  261  262  263  264  265  266  267  268  269  270  271

XIII GEOGRAPHICAL EVOLUTION  272  272  273  274  275  276  277  278  279  280  281  282  283  284  285  286  287  288  289  290  291  292  293  294  295  296  297  298  299  300  301  302  303  304  305  306

[295] If we take ... The Silurian system -- and if we assume that it spreads over 60,000 square miles of Britain with an average thickness of 16,000 feet, or 3 miles, which is probably under the truth, then we obain the enormous mass of 180,000 cubic miles. ... All this vast pile of sedimentary rock was worn from the slopes and shores of the primeval northern land. Yet it represents but a small fraction of the material so removed, for the sea of that ancient time spread over nearly the whole of Europe eastwards into Asia, and everywhere received a tribute of sand and mud fom the adjoining shores.


XIV. THE GEOLOGICAL INFLUENCES WHICH HAVE AFFECTED THE COURSE OF BRITISH HISTORY 307  307  308  309  310  311  312  313  314  315  316  317  318  319  320  321  322  323  324  325  326  327  328  329  330  331  332




LIST OF ILLUSTRATIONS.

NOTE: High Resolution images of all illustrations are available here.

1. The Old Man of Hoy." (Sketched from the Sea) 26
2. View of the Flagstone Cliffs of Holburn Head, Caithness 33
3. View of Flagstone Cliffs, Brough of Birsay, Orkney 34
4. View of the Gneiss Cliffs near Cape Wrath 37
5. View of part of the Cliffs near St. Abb's Head 38
6. View from the top of the Puy de Pariou 91
7. Ice-worn bosses of gneiss and perched blocks. North coast of Sutherland 113
8. Map of the Neighbourhood of the Holands Fjord (Munch) 117
9. View of the two Glaciers of Fondalen, Holands Fjord 119
10. Longitudinal Section of smaller Glacier. Fondalen 121
11. Sketch-map of lower and of larger Glacier. Fondalen 123
12. Sections across the lower end of the larger Glacier. Fondalen 124
13. Map of the Jökuls Fjeld promontory (after Munch) 132
14. View of Jökuls Fjord Glacier 134
15. Section of Foot of Jökuls Fjord Glacier 136
16. View of Glaciers at the head of Nus Fjord 141
17. Section on beach at Nus Fjord 143
18. Section on beach at Ardmarnock, Loch Fyne 143
19. Ben Leagach, Glen Torridon 149
20. View of the ancient platform of gneiss looking eastward from above Scourie, Sutherlandshire 151
21. Ben Shieldag, Loch Torridon 153
22. View of outlier of Cambrian breccia and sandstone among gneiss hills near Gairloch 155
23. Sections of the junction of the fundamental gneiss and overlying Cambrian breccia. Gairloch 157
24. Microscopic structure of white marble employed in Edinburgh tombstones 163
25. Terraces of Great Salt Lake, along the flanks of the Wahsatch Mountains, south of Salt Lake City 211
26. Alluvial Cones of the Madison Val1ey 215
27. Terraces below the second canyon of the Yellowstone 219
28. "Old Faithful" in eruption 229
29. View on the Snake River, Idaho. Basalt Plain with younger volcanic cones 237