OCR Text |
Show PROFESSOR FINDS CAUSE OF I REGENT HEAVY . EftRTHQUflKE I That the big earthquake which occurred oc-curred on the night of October 2nd was due to a hitherto ununown fault in the Sonoma range of mounta-ins along tho foothills of Mount Tobln, sixty miles south of WInuemucca, Is the opinion of J, C. Jones, professor of geology of the state university. Professor Jones and Professor Boardman, of the engineering department depart-ment of the university, arrived from Reno Saturday morning and left for Pleasant valley, accompanied by Attorney At-torney L. G Campbell, with Roy K. Brown as driver of their auto. They returned last evening ..nd Professors Jones and Boardman left for Reno. Speaking of their observations along the fault or break in the earth's crust, which they examined from one end to the other, Mr. Carapboll said to a representative of the Star this morning: morn-ing: "The northern end of the fault Is in the foothills of Mount Tobin, about three miles from Mud Springs, and it extends continuously almost duo couth about thirty miles to a point a few miles below the Cooper & Unlacke ranch. At its southern end tho fault spreads out like a hand. From a distance dis-tance tho lino of the break along the fault resembles a railroad grade. Measurements of the distance of the slip or drop along the fifteen feet. The anglo of the fault is 51 degrees, the dip being to the west, the earth having moved in that direction. The trend Is almost duo north and south. "In a few places along the break wo found slickenslldes. as found on the walls of veins, proving the plane of action. The slickenslldes showed a slight movement of the Blidlng mass to the north, but our observations of the break where it interesectod fences roads and irrigation ditches showed the drop to be straight downward. In the valley and along the hill-sides near the Cooper & unlacke ranch, H there wer many light fractures, not 'H along the line of the fault. These H fractures were caused by the tremen- H dous jar when the slip occurred. This H fracturing occurring on the surface, H is een fcr miles. Surface water came H up through these cracks and the H ground had the appearance of being ;H swept by an enormous cloudburst H "From our examination we found ! no evidence of the great fault or slip lH being the reopening of an old one, tha H conclusion being that the slip which 'H caused the earthquakes was a new H one. However, there were indications ;H of old faulting above the -ew break, H the old fault scrap showing qulto H plainly. WM "Professor Jones, speaking of the KH probability of other earthquakes, with H this section as tho center of disturb- 'H ance, gave it as his opinion that there lH is no danger and that it will probably l be years before another similar drop 'H will occur on this fault plane like 'U those of the afternoon and night of IH October 2nd. He said that for two or wM three weeks, however, light jars would IH probably occur, the result of the set- ' H tling of the great mass of segments, ' which have to adjust themselves after .H tho great movement which occurred. H To this settling is due the light shocks iH which have occurred since the big one .H eight days ago, ;H "It is probable that Professor Jones 'H will come to Winnemucca at an early H date and deliver a public lecture on 'H earthquakes, when he will fully and 'H plainly- explain what caused the great jH shake-up of October 2nd, which ho ' said was great enough in violence to :H be felt in New York City. Ho also 'M said that faults of the extent of tho :H now one at Mount Tobin usually are jH about five jnlles in depth." Humboldt !H Star, Winnemucca, Nevada. jH . jl |