30 TARR AND MARTIN CHANGES OF LEVEL IN YAKUTAT REGION 



Page 



Native testimony 45 



Evidence of depression 46 



Regions of slight or no movement 46 



Effects of the earthquake 47 



In general • • • • 47 



Earthquake avalanches 47 



Wave-swept areas 48 



Evidences of recent faulting 50 



Recent faults on Gannett nunatak 50 



Recent faulting and avalanches 50 



Other instances of recent faulting 51 



Evidences of older changes of level 51 



Evidence of older fault lines 51 



Older elevated shorelines 52 



Evidence of older depressions 54 



Statement of quantitative observations 54 



Methods employed 54 



Changes of level on the foreland 55 



Changes of level along the mountainous east coast of Yakutat bay 56 



Changes of level in Disenchantment bay , . . . . 57 



Changes of level in the northwest arm of Russell fiord „ 58 



Nunatak fiord 58 



Changes of level in the south arm of Russell fiord 59 



Interpretation of observations 59 



In general 59 



Mountain-front fault 60 



Possible minor fault southwest of Knight island 60 



Fault along east shore of Yakutat bay 61 



Faulting along Disenchantment bay , 61 



Fault line in northwest arm of Russell fiord 62 



South arm of Russell fiord 62 



Minor faulting 62 



Folding versus faulting 62 



Nature of the deformation 63 



Topographic significance 63 



Comparison with other historic uplifts 64 



Introductory Considerations 

 earthquake of september, 1899 



The San Francisco Examiner for September 25, 1899, contains a letter 

 sent from Yakutat, Alaska, September 17, by the Keverend Sheldon Jack- 

 son, giving a vivid but exaggerated account of a series of earthquake 

 shocks beginning September 3 and still continuing at the date of writing 

 the letter. Some of the statements are evidently erroneous, but manv 



