162 Scientific Intelligence. 



in the vicinity of Coyote, a small town built on the alluvial floor 

 of Santa Clara Valley, twelve miles southeast of San Jose. The 

 intensity throughout the hills between Coyote and Mt. Hamilton, 

 while apparently not as great as it was near Coyote itself, was the 

 greatest reached at any place where the immediately underlying 

 formation does not consist of unconsolidated, filled-in material. 

 The time of the shock at Lick Observatory on Mt. Hamilton is 

 the earliest reliable time reported. Coupled with the fact that 

 the earthquake materially increased the flow of several streams 

 near Mt. Hamilton, these facts seem to indicate that the epicenter 

 was in the region between Coyote and Mt. Hamilton. The move- 

 ment probably occurred at a considerable depth, with the dis- 

 placement entirely taken up by the overlying material, leaving no 

 trace or rift on the surface." 



Some pout- Glacial faults near Banning, Ontario, are described 

 by A. C. Lawson. They occur in a region of marked stability, 

 and are found to exist on the glaciated surface of Archean rocks. 

 The chief facts stated in regard to them are as follows : " The 

 glacial striae are constant in direction over this surface, and their 

 course is ST. 20° E. This glaciated surface is dislocated by a 

 series of reverse or overthrust faults. The fault-plane in most of 

 these is coincident with the cleavage of the slates, and since this 

 dips to the north the result is a series of southerly facing and 

 overhanging scarps, inclined to the horizon at 65°. The edge or 

 crest of the up-thrust block is thus rather acute, being about 25°, 

 and this acute edge is usually perfectly sharp and unworn except 

 for artificial breaks. The reentrant angle at the base of the 

 scarp, where it meets the horizontal surface of the next lower 

 block to the south, is equally sharp. In no case could any fault 

 breccia or gouge be detected even on a microscopic scale ; nor 

 was any well-defined slickensiding observable, although in some 

 cases the surface of the scarp appeared to be smoother than the 

 ordinary cleavage face and even to have a faint polish. 



" In every case observed the movement on the faults appeared 

 to be in the direction of the dip, or to have no horizontal compo- 

 nent except that normal to the strike. This could be determined 

 by observing the displacement of particular striae or grooves. 

 On the up-thrust block the striae, which make an angle of 61° 

 w T ith the strike of the faults, extend out to the very brink of the 

 scarp, and on the adjacent block to the south the striae pass in 

 under the overhanging scarp and abut against its base. These 

 fault scarps are small but numerous. The highest one measured 

 3f inches vertically, and the others range down to one-eighth of 

 an inch in height. In a distance of 66 feet across the strike 

 twenty-four scarps were counted, and as the faulted surface 

 passed beneath the drift on both sides of this, there is every 

 reason to suppose that there are many more than could be ob- 

 served." 



Similar faults have been described by other authors, but it 

 seems doubtful whether they are to be referred properly to oro- 



