Wood — Effects in Mokuaweoweo of the Eruption of 191J±. 389 



through a tract of intimately mingled, shattered pahoehoe and 

 an a-a of a very coarse, rough, and hard sort. The floor and 

 walls of the channel were chiefly of smooth pahoehoe, afford- 

 ing for a short distance a good pathway from the cone. Else- 

 where all about the cone there was either a-a or badly shattered 

 pahoehoe. See the photograph fig. 2a. 



The smaller cone seen in 1913 was not closely visited. It 

 was situated in the southwest part of the main depression not 

 far from the point of a miniature promontory jutting out from 

 the west wall. Thus it was near to, but not within, the mouth 

 of the recess in the south lunate platform where this adjoins 

 the west wall. A little to the north of the cone, against the 

 wall, was an area of smooth pahoehoe. Save for this, this cone 

 was surrounded by a-a tracts and patches of rough-looking 

 pahoehoe. See the photograph, fig. 5a. 



In general in 1913 the floor of the main depression was a 

 highly complicated pattern of intermingled pahoehoe and a-a. 

 In the absence of a suitable map, and especially in view of the 

 short duration of this expedition, no mapping of such details 

 could be undertaken. It happens, however, that on the floor 

 near the eastern end of the south lunate platform there was a 

 small area in which a-a and smooth pahoehoe were arranged 

 in a well-marked pattern which lent itself well to photographic 

 record, — and here is possible a comparison of details with the 

 conditions seen in the field and photographed in the latest expe- 

 dition in 1915. See the photographs, figs. 4<z and 4c. It is only 

 here and in the neighborhood of the larger cone that detailed 

 comparisons are possible. Fortunately the action in 1911-15 

 was such as to produce easily recognizable changes without the 

 necessity of referring to miniature details of the floor. 



The three photographs, 2a, 3a and la, were made in 1913 

 from the edge of the crater wall directly in front of camp, just 

 above the south lunate platform a little to the south of its east 

 end. Fig. 2a looks a little W. of JN.W.; da, a little north of 

 K of KN.W. ; and fig. 4a, a little E. of N. These three pic- 

 tures practically cover, in panorama, the view from camp-site 

 of the floor region and walls north from the central part of the 

 crater. 



Attention is directed to the cone in fig. 2a ; the gash through 

 it ; the small depression just north of it, barely visible in the 

 photograph ; the channel leading southeastwardly from the 

 gash; the slightly depressed area of pahoehoe in the middle 

 ground ; and to the details of the west wall in the background, 

 especially near its junction with the floor. Particularly, notice 

 should be taken of the fact that the cone is silhouetted against 

 the wall, and that outcropping layers of rock are to be seen at 

 the base of the wall-talus to the west of the cone. 



