yio 



E. S. MOORE 



signifies "warm lake," and steam rises from many parts of the 

 shore, especially near the northwest corner where the terraces and 

 other hot-spring phenomena were most prominent before the 

 eruption. The color of the water is a sort of dirty, greenish gray, 

 like that of glacial streams, this hue being caused, no doubt, by the 

 large amount of extremely fine particles of mineral matter suspended 

 in the water. 



Continuing westward the fissure passes through Black, Inferno, 

 Echo, and Southern craters, all of which exhibit considerable 



Fig. 12.- — Lake Rotomahana, through which the great fissure passes from end to 

 end. Looking westward from Mount Tarawera. 



thermal activity at the present day. The basin of the extraordinary 

 Waimangu Geyser, now inactive, is located on this line a short 

 distance from Lake Rotomahana. This geyser became active 

 in 1900 and continued more or less irregularly until 1908, when it 

 ceased to act. It has been reported by various reputable author- 

 ities that it often threw water and mud to a height of from 1,200 

 to 1,500 feet. With the extinction of this geyser the surrounding 

 springs became more active. The Waimangu "blow hole," 

 situated southwest of the geyser orifice, blows hot water and steam 

 for two minutes and is then quiescent for seven. In Echo Crater 



