Wood— Effects in MoTcuaweoweo of the Eruption of 191J+. 395 



ing about S.S.E., fig. 5a. In the interim great changes have 

 taken place in this part of the central depression. This is the 

 southwest and south central part of it, north from the cliff wall 

 of the south lunate platform. In 1913 this was an area of 

 commingled pahoehoe and a-a with a small "double" cinder 

 cone and an area of smooth pahoehoe adjoining the west wall 

 north of this. Everywhere the cliff wall of the south lunate 



Fig. 5c 



platform was well marked and fairly high. Examine the fore- 

 ground and middle ground, fig. 5a. 



As early as December 15, 1914, considerable changes had 

 been effected here. Eruption was then in progress. There 

 was a lava lake of moderate area — say 500 feet (about 150 

 meters) long, — confined by a wall of spatter outfall so that it 

 stood from 10 to 20 feet (from 3 to 6 meters) above the level 

 of the surrounding floor. Out of this, lava appeared to be 

 flowing in an overcrnsted stream through a gap in the spatter 

 wall at the south. Near the northwest margin of this lake a 

 fountain of molten froth was playing to estimated heights of 

 150 to 200 feet (45 to 60 meters). The cinders and pumiceous 

 matter outfalling from this were building a three-quarter cone, 

 fig. 5# 2 . From this place of upwelling, presumably, much lava 

 had already poured ont onto the adjacent crater floor and 

 streamed away in several directions, at one place reaching the 

 east wall. In the south-central part it had already built up to 

 the level of the south lunate platform, and it had nearly obliter- 

 ated t the cliff wall here. This lava lake and cone were near 

 to if not exactly over the site of the smaller cone of 1903. 



