Quart. Journ. Geol. Soc. Vol. LXVI, Pl. XLVIII 
Fig. 1. 
SLAGGY LAVA (PAHOEHOE), SHOWING CORDED STRUCTURE. 
T. A., Photogr. p |Q ^ 
LAVA-FIELD WITH BLOCKS BROKEN UP BY INTRUSION OF LAVA. 
SEEN ON THE LINE OF THE PRESENT UNDERGROUND 
FUMAROLES ARE 
FLOW. 
