The National geographic magazine . 43° The National Geographic Magazine. Richmond Estate, St Vincent, May 25, 1902 Dunes of wind-drifted volcanic lapilli and dust from La Soufriere on a previously cultivatedarea. The tree trunks are the remains of palms. The rill channels show the beginning of theerosion of the freshly added layer, which is from three to ten or more feet thick (see page 432) cant. From the various accounts ofthe eruptions of Mont Pelee available,it now seems evident that the blastswhich destroyed so much of the vegeta-tion of Martinique and wrought havocin St Pierre came from
The National geographic magazine . 43° The National Geographic Magazine. Richmond Estate, St Vincent, May 25, 1902 Dunes of wind-drifted volcanic lapilli and dust from La Soufriere on a previously cultivatedarea. The tree trunks are the remains of palms. The rill channels show the beginning of theerosion of the freshly added layer, which is from three to ten or more feet thick (see page 432) cant. From the various accounts ofthe eruptions of Mont Pelee available,it now seems evident that the blastswhich destroyed so much of the vegeta-tion of Martinique and wrought havocin St Pierre came from the crater witha deeply notched rim, and that thedirection taken by the blasts, at least onMay 8 and May 20, was determined bythat rift in the craters rim. As stated by T. A. Jaggar, the down-ward blasts from volcanoes do not re-quire a horizontal nozzle to projectthem. They are simply the result ofthe down-blast after the heavy gravelhas begun to fall, acting against theupblast from the throat of the volcano,and both together deflected and thrown into terrific whirls
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectgeography, bookyear18
