. Bulletin of the Geological Society of America. Geology; Geology -- United States. 388 WASHINGTON AND DAY VOLCANOES OF SOUTHERN ITALY. f^' ^MiUMs^ E â ⢠...' â 'â '^;^'y.''^'vâ¢''lâ ^^vâ¢'"'.â¢''^ ' r'/]. if not earlier. Bocche C and I) are of m <]uite different type and much k'ss acti\('. (" is in a solfataric state and emitted puffs of white smoke, with little ___^ noise and without stones. ^^mmm^WT^^'^'- ^ I I) showed little aetivity, occMsjoiially lining (|iiietly with sluggisii yellow smoke. (' seems to l)e later than 1). as its outline cuts into that of the latter. Tlie la
. Bulletin of the Geological Society of America. Geology; Geology -- United States. 388 WASHINGTON AND DAY VOLCANOES OF SOUTHERN ITALY. f^' ^MiUMs^ E â ⢠...' â 'â '^;^'y.''^'vâ¢''lâ ^^vâ¢'"'.â¢''^ ' r'/]. if not earlier. Bocche C and I) are of m <]uite different type and much k'ss acti\('. (" is in a solfataric state and emitted puffs of white smoke, with little ___^ noise and without stones. ^^mmm^WT^^'^'- ^ I I) showed little aetivity, occMsjoiially lining (|iiietly with sluggisii yellow smoke. (' seems to l)e later than 1). as its outline cuts into that of the latter. Tlie last bocca. F, is the most ])eculiar. It "blows oft'"' at intervals of from 20 to 10 minutes from a small, shallow, scarcely noticeable depression in the scoria- strewn floor near the east- ern Filone, visible to the right in ]date 24. There is a loud, startlingly sudden blast, like tlie letting off of. steam from a gigantic boiler, am] the rapid ascent of a narrow, very tall col- umn of white or gra}^ smoke from a small orifice which makes its appear- ance at the bottom of the depression. The edges of the orifice become red hot and there is a small, low spatter of molten material. The blast continues with increasing loudness for from half a minute to two minutes and then ceases, generally suddenly. During the last few seconds the dense smoke generally ceases and the noise of the blast continues with the emission of faint whitish or bluish vapor. After the outburst the orifice closes and the depression becomes again black and scarcely detect- able. There was not much fumarolic activity, this being confined chiefly to the battery (F on the map) along the Filo del Zolfo and some slight vapor spires over the crater floor. The general smoke, as observed on the ridge above the crater, was acid and smelt somewhat strongly of SO,. %';^'.' Porta delle Croci .^â ⢠I'"KaRE 1.âSketch Maii of tlic ('ruler of Strtimbnli. Please note that these images are extrac
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