Contributions in geographical exploration . forth when alava flow pours through a forest. (See page 133). ATTEMPTS TO EXPLAIN IT AS A MUD FLOW OF THEUSUAL TYPE. When it thus became evident that our flow of hot mudcould not be considered a lava flow, the most probable explana-tion seemed to lie in interpreting it as a mud flow of the con-ventional kind, formed from the ejecta of some previouseruption. Such a hypothesis would of course leave its temper-ature unaccounted for, if indeed it were not inconsistent withthe observed temperature relations; but if its other features 132 The Ohio Journal
Contributions in geographical exploration . forth when alava flow pours through a forest. (See page 133). ATTEMPTS TO EXPLAIN IT AS A MUD FLOW OF THEUSUAL TYPE. When it thus became evident that our flow of hot mudcould not be considered a lava flow, the most probable explana-tion seemed to lie in interpreting it as a mud flow of the con-ventional kind, formed from the ejecta of some previouseruption. Such a hypothesis would of course leave its temper-ature unaccounted for, if indeed it were not inconsistent withthe observed temperature relations; but if its other features 132 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 the mud flow were thus the product of a previous eruption,it would be expected to have been formed immediately afterthat eruption, Hke the Katmai Mud Flow, before the mass ofmud had had time to dry up and set. For, once sucha mass of mud dries out, it would not be Hkely to be soaked up. l^notugraph by L. G. FolsontA STREAM CUT SECTION NEAR THE TOE OF THE MUD engulfed tree is completely reduced to charcoal. The section shows (a)piles of debris lying on the original surface of the ground; (b) the unstratifiedmass of the mud flow; (c) the three layers of the ash from Katmai; (d) a massof secondary outwash deposited by the stream which later cut the wash of this stream broke off the part of the tree protruding above themud flow. Dec, 1918] The Great Hot Mud Floiv 133 again en masse in such a manner as to j^ermit the formation ofsuch a tremendous quantity of mud all at once. Indeed,I can imagine no process of nature by which the presenthardened tuff could be changed back \x\U) ]i(}ui(l mud. But the condition of the burned trees is unequivocal proofof the recent date of the mud flow. It occurred so recentlythat there has been no time for the ])rotruding ])arts of treesto decay since they were killed. Even the
Size: 1252px × 1996px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, bookpublishercolum, bookyear1920
