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The Ohio Journal of Science [Vol. XIX, No. 2, 



could be accounted for on such an assumption, its high tempera- 

 ture might perhaps be explained by some subsidiary hypothesis. 

 If the mud flow were thus the product of a previous eruption, 

 it would be expected to have been formed immediately after 

 that eruption, like the Katmai Mud Flow, before the mass of 

 mud had had time to dry up and "set." For, once such 

 a mass of mud dries out, it would not be likely to be soaked up 



Photograph by L. G. Folsom 



A STREAM CUT SECTION NEAR THE TOE OF THE MUD FLOW. 

 The engulfed tree is completely reduced to charcoal. The section shows (a) 

 piles of debris lying on the original surface of the ground; (b) the unstratified 

 mass of the mud flow; (c) the three layers of the ash from Katmai; (d) a mass 

 of secondary outwash deposited by the stream which later cut the section. 

 The wash of this stream broke off the part of the tree protruding above the 

 mud flow. 



