Page:The Scientific Monthly vol. 3.djvu/435

 EXPLOSION CRATERS

��sandstone, in part capped by a lava sheet of moderate antiquity. Prom the lake occupying part of the center of the crater rise two Email cones of scoria, one with deep crater, and evidently very recent. The ejected material covers a wide area on the rim and beyond^ and while it is much too small in volume to fill the crater, probably a large amount has been

��FlO. IT. PlST OP Tun OOBAT RlU Or FBAOUENTS of LiUBHTOIil AKD SUiDHTONI

BIBCTED psou CUTSB HouND, Abizoni. Pboto bf G. K. Qllbcrt. Mao; of Uie maasM welgb more than a,000 ions, the largest 20,000 lona and the total unount at «Jecta la aboat ZOO mlUlon tons or approilmatcl; lofflcleat to All the bole.

�� �