VOLCANIC CKATERS IN IDAHO AND OREGON 549 



Tlie second pai)er was received from Section P], entitled : 



LUNAR CALDERAS 

 BY MISS E. HAYES 



Remarks were made by Whitman Cross and T. C. Chamberlin. A 

 short abstract is printed in Science, volume xvii, page 222. 



The three following papers, by the same author, were presented with- 

 out discussion, the second one being read by title : 



RECENT VOLCANIC CRATERS IN IDAHO AND OREGON 

 BY ISRAEL C. RUSSELL 



[Abstract] 



Four groups of craters were described, namely, the Cinder Buttes, Idaho, and 

 the Diamond, Jordan, and Bowden craters, Oregon, The craters in each of these 

 groups are remarkably fresh and furnish typical examples of both cinder cones 

 and " lava cones." Vast volumes of lava were poured out from each of the groups 

 of craters, which at the time of its extrusion was highly liquid, but became ex- 

 ceedingly viscous as it slowly cooled. Illustrations were shown of cinder cones, 

 lava cones, driblet cones or "ovens," lava "gutters," a large variety of volcanic 

 bombs, dunes of lapilli, large fragments of tuff derived from cinder cones ruptured 

 by escaping lava and floated on the lava streams, islands in lava streams, charac- 

 teristic features of the surfaces of lava streams, etcetera. 



The paper was an abstract from a report since published in Bulletin 

 number 217 of the U. S. Geological Survey. 



LAKES MALHEUR AND HARNEY, OREGON 

 BY ISRAEL C. RUSSELL 



lAbstractl 



These lakes furnish an instructive example of the manner in which a water body 

 has been divided by the formation of sand dunes, and of the overflow of one 

 alkalin lake into another, so as to lead to the freshening of the former and the 

 concentration of the latter. 



This paper was an abstract of a report since printed as Bulletin num- 

 ber 217 by the U. S. Geological Survey. 



ARTESIAN WELLS NEAR ENTERPRISE, IDAHO 

 BY ISRAEL C. RUSSELL 



[Abstract] 



The wells referred to are situated in the Lewis artesian basin, and from their 

 increase in temperature as a large hot spring as Enterprise is approached, it seems 



