﻿270 
  Jaggan 
  — 
  Lava 
  Flow 
  from 
  Mauna 
  Zoa, 
  1916. 
  

  

  the 
  flow 
  westward 
  from 
  cones 
  still 
  farther 
  north, 
  the 
  line 
  of 
  

   cones 
  being 
  nearly 
  straight 
  (fig. 
  5). 
  

  

  Comparing 
  the 
  map 
  of 
  Hawaii 
  (this 
  Journal, 
  Dec, 
  1915), 
  it 
  

   will 
  be 
  seen 
  that 
  the 
  new 
  flows 
  straddled 
  the 
  northward 
  exten- 
  

   sion 
  of 
  the 
  1907 
  flow, 
  coming 
  out 
  of 
  the 
  same 
  general 
  zone 
  of 
  

   cracks, 
  and 
  forked 
  southeast 
  and 
  southwest 
  in 
  the 
  same 
  fashion 
  

   as 
  the 
  1907 
  flow 
  had 
  done, 
  but 
  from 
  a 
  higher 
  point 
  on 
  the 
  

   mountain, 
  and 
  with 
  a 
  more 
  extensive 
  spread 
  of 
  the 
  lava 
  to 
  

  

  Fig. 
  4. 
  

  

  Fig. 
  4. 
  Sketch 
  map 
  1916 
  lava 
  flows, 
  showing 
  general 
  arrangement 
  fissure 
  

   eruption 
  north 
  from 
  Puu 
  o 
  Keokeo. 
  Map 
  furnished 
  by 
  courtesy 
  Territorial 
  

   Surveyor 
  of 
  Hawaii. 
  

  

  the 
  east. 
  This 
  was 
  due 
  to 
  the 
  presence 
  of 
  a 
  flattening 
  of 
  the 
  

   mountain 
  surface 
  near 
  Puu 
  o 
  Keokeo 
  and 
  it 
  was 
  probably 
  this 
  

   flattening 
  and 
  the 
  expenditure 
  of 
  the 
  -flood 
  in 
  two 
  branches 
  

   thus 
  early 
  which 
  partly 
  saved 
  the 
  ranches 
  and 
  prevented 
  the 
  

   flow 
  from 
  reaching 
  the 
  government 
  road. 
  There 
  is 
  great 
  need 
  

   of 
  a 
  good 
  topographic 
  map 
  of 
  Mauna 
  Loa 
  for 
  the 
  benefit 
  of 
  

   ranches 
  during 
  such 
  a 
  crisis. 
  The 
  flood 
  of 
  lava 
  which 
  spread 
  

   eastward 
  during 
  the 
  first 
  night 
  was 
  the 
  widest 
  and 
  probably 
  

   the 
  thickest 
  portion 
  of 
  the 
  1916 
  basalt 
  and 
  this 
  area 
  has 
  

   tongues 
  eastward 
  not 
  shown 
  on 
  the 
  map. 
  

  

  