 | Science - 1906 - 598 pages
...visible. The Xew Madrid and Charleston earthquakes are examples of those having deep-seated origins, the Inyo and San Francisco of those whose causative faults reached the surface of the ground. The general character of California earthquakes was so well known that when the dispatches told of a severe... | |
 | Geology - 1908 - 874 pages
...of a mere fracture there is a geologic fault. After a fault has been made, its walls slowly lieeome cemented or welded together; but for a long time it...hundred miles. Visible evidence of fresh slipping — a surf:ni' trace, to be described presently — does not appear through its whole extent, but has been... | |
 | Ralph Arnold, Robert van Vleck Anderson - Geology - 1907 - 564 pages
...ruptures extend to the surface, and thus become visible. The New Madrid and Charleston earthquakes arc examples of those having deep-seated origins; the...Francisco earthquake had its origin, wholly or chiefly, in fault trace and diminished with distance therefrom; but to this rule there are important exceptions,... | |
 | National Academy of Sciences (U.S.) - Scientists - 1926 - 624 pages
...earthquake in the region of its destructive intensity," from which the following passages are taken: The San Francisco earthquake had its origin, wholly...in a new slipping on the plane of an old fault [The San Andreas fault, passing a little to the west of the city]. The trend of the fault is northwest and... | |
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... rupture, and hundreds of earthquakes may thus originate in the same place. A faulting may occur far beneath the surface and be known only through the resulting earthquake; but some of the quake-causing ruptures extend to the surface, and thus become... 