N 



180 



CHAPTER XXXI. 



elevatio:n' and subsideis^ce of land without earthquakes. 



CHANGES IN THE RELATIVE LEVEL OE LAND AND SEA IN REGIONS NOT 

 VOLCANIC OPINION OF CELSIUS THAT THE AVATEUS OF THE BALTIC SEA AND 



WERE 



■OBJECTIONS RAISED TO HIS OPINION 



PROOFS OF THE STABILITY OF THE SEA LEVEL IN THE BALTIC — PLAYFAIR'S 

 HYPOTHESIS THAT THE LAND "WAS RISING IN S-S\^EDEN — OPINION OF VON BTJCH 

 MARKS CUT ON THE ROCKS SURVEY OF THESE IN 1820 SIGNS OF OSCILLA- 

 TIONS IN LEVEL FISHING HUT BURIED UNDER MARINE STRATA FACILITY OF 



APPRECIATING SLIGHT ALTERATIONS OF LEVEL ON THE INNER AND OUTER COAST 



OF SWEDEN SUPPOSED MOVEMENT IN OPPOSITE DIRECTIONS IN PROCEEDING 



FROM THE NORTH CAPE SOUTHWARDS TO SCANIA— CHANGE OF LEVEL ON THE 

 WEST COAST NEAR GOTHENBURG — GEOLOGICAL PROOFS OF THE GREAT OSCILLA- 

 TION OF LEVEL SINCE THE GLACIAL PERIOD AT UDDEVALLA — UPRAISED MARINE 

 DEPOSITS OF THE W^ESTERN COAST OF SWEDEN CONTAINING SHELLS OF THE 

 OCEAN, THOSE ON THE EASTERN COAST SHELLS OF THE BALTIC -WHETHER 

 NORWAY IS NOW RISING — MODERN SUBSIDENCE IN PART OF GREENLAND — 

 PROOFS AFFORDED BY THESE MOVEMENTS OF GREAT SUBTERRANEAN CHANGES. 



^ 



We have now considered the phenomena of volcanos and 

 earthquakes according to the division of the subject before 

 proposed (YoL I. p. 577), and have next to turn our attention to 

 those slow and insensible changes in the relative level of land 

 and sea which take place in countries remote from volcanos, 

 and where no violent earthquakes have occurred within the 

 period of human observation. Early in the last century the 

 Swedish naturalist, Celsius, expressed his opinion that the 

 waters, both of the Baltic and Northern Ocean, were gradually 

 subsiding. Prom numerous observations, he inferred that the 

 rate of depression was about 40 Swedish inches in a century .-^- 

 In support of this position, he alleged that there were many 

 rocks both on the shores of the Baltic and the ocean known 

 to have been once sunken reefs, and dangerous to navigators. 



t" 



* The Swedish measure scarcely dif- into twelve inches, and being less than 

 fers from ours ; the foot being divided ours by three-eighths of an inch only. _ 



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