Contributions in geographical exploration . til we could thoroughly digest the evidence and with some students of volcanism in whose judgment wehad confidence. When the matter was first put before thesemen, it was met with the most violent opposition. Theyuniformly reacted to the proposition exactly as we had ourselveswhen we first encountered it in the field. But in the end, whenthe evidence was presented and all objections answered, with-out exception they accepted the inter])retation as the necessaryconsequence of the facts. ?Copyright, 1919, by National Goographie Socifty, Wash
Contributions in geographical exploration . til we could thoroughly digest the evidence and with some students of volcanism in whose judgment wehad confidence. When the matter was first put before thesemen, it was met with the most violent opposition. Theyuniformly reacted to the proposition exactly as we had ourselveswhen we first encountered it in the field. But in the end, whenthe evidence was presented and all objections answered, with-out exception they accepted the inter])retation as the necessaryconsequence of the facts. ?Copyright, 1919, by National Goographie Socifty, Washington, I). C. .MIrights reserved. 117 lis The Ohio Journal of Science [Vol. XIX, No. 2, I have thus entered into a somewhat personal statement ofthe matter because I must expect my readers, at least those whohave any previous acquaintance with volcanoes, to assume thesame attitude and would bespeak in advance their carefulconsideration to the end, rather than the unceremonious rejec-tion which would otherwise be the fate of the Photograph by R. F. Griggs A CAXYOX NEARLY 100 FEET DEEP, CUT INTO THE MUD FLOW. Although this section is located far down the Valley, it shows no indication of the bottom of the mud flow. The thin strata of the Katmai ash may be seen near the top. The figure at the left gives the scale. Dec, 1918] The Great Hot Mud Fhnv 119 I would further add that I am not committed to any theoryof the origin of this curious terrane, but will be glad to acceptany other interpretation that can be suggested, provided onlythat it is consistent with the facts as found in the field. Certainlyany suggestion that would relieve us of the necessity of postu-lating an entirely new type of volcanic action will be mostwelcome. VALLEY OF TEN THOUSAND SMOKES FILLED WFI 11 .\ (.REATDEPOSIT OF TUFF. Surrounded as it is by high and rugged mountains, the moststriking featu;-e of the conformation of the Valley of TenThousand Smokes is the flatness of its floor. One could ridea
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