230 



REPORT UNITED STATES GEOLOGICAL SURVEY. 



impassable canon, with nearly vertical walls, and no springs are met 

 with until the Third Geyser Basin is reached. 



THE GIANTESS GROUP. 



This group of springs includes two of the most powerful geysers in 

 the Upper Basin and many interesting springs. The mound of sili- 

 ceous sinter ui)on which they are located is on the north side of the river 

 immediately opposite Old Faithful Group. The Fire Hole Eiver enters 

 the basin, ilowing almost due north. It very soon turns and flows west- 

 ward between the Giantess and Old Faithful Groups, and after passing 

 the latter turns to the northward along the western side of the latter. 

 The group is very compact, occupying an area of about 22 acres. This 

 area is covered with the siliceous deposits in laminse, as though origi- 

 nally there had been one immense spring which built the mound, and 

 on dying out had given rise to the many springs that now exist over its 

 surface. The Bee Hive, ]^ew Geyser, and Trinity are the geysers hav- 

 ing cones or craters. The Giantess would not ordinarily be taken for a 

 geyser. As the following table shows, about 46 springs were examined. 



TaMe of Giantess Group. 



ifTame and num- 

 ber. 



Size and deptli. 



Surface and other 

 temperatures. 



Eemarks. 



Giantess Geyser 



Bee Hive Geyser 



2 



3 



4 



5 



6. Vault Sprin 



7 



8 



8a 



9 



10 



11, 



12 



13 



14 



34 by 24 feet . 



Cone is 3 feet high, 

 3 by 4 feet on top, 

 oriiice is 2 by 3 

 feet, 21 feet deep. 



10.V by llA feet, 14 

 feet deep. 



Fissure 4 feet long.. 



5 by 6 feet 



Basin 15 by 18 feet, 

 spring 8 by S feet. 



8 by llj feet, 16 feet 



deep. 

 17 feet by5 to 10 feet, 



9 feet deep at one 



end, 13 feet at tlie 



other. 

 11 by 7J feet, 12 feet 



deep, rim 18 inches 



high. 

 64 feet long, 12 feet 



deep. 

 2 feet'drain 



4 by 4 feet . . 

 Gi by 8 feet . 



2 feet diameter . 



Basin with two h oles. 

 a is 10 by 14 feet, 

 6 is 9 by IS feet, 8 

 feet deep in deep- 

 est place. 



3 feet diameter 



4by 6feet 



o -p^ 

 Surface, 199; 12 feet 



below the surface, 



201. 

 5 feet below top of 



cone, 200; 15 feet 



below top of cone, 



204. 

 Surface, 175; 12 feet 



below the surface, 



186. 



4 p. m. 



Surface, 145. 

 Surface, 193 . 



Surface, 180; 15 feet 

 below surface, 198. 



Surface, 172; 12 feet 

 deep, 173. 



Surface, 197; 11 feet 

 deep, 205. 



Surface, 395; 11 feet 



deep, 203. 

 Surface, 194 



Can't be taken 

 163 



182 



Surface, 176; 

 deep, 191. 



7 feet 



162 



5 feet down the tem- 

 perature is 150. 



See text for complete 

 notes. 



See text for complete 

 notes. 



"Deep-blue spring, 

 with scalloped edge 

 on high mound. 

 Yellow sputterer. 

 Quiet inkish pool. 

 Crater-like hole in 



which the water is 



6 feet below the 



surface. 

 Bluish- gray basin; 



bubbles at one side. 

 Oblong spring on the 



plattbrm of the 



Giantess. 



Boiling spring with 

 inky-hued water. 



Active spouter. 



Near No. 8 water is 

 2 feet below the top. 



Yellow spouter. 



Water is 9 feet below 

 surface in a ragged 

 purplish crater. 



Yellow crater-like 

 hole. 



This spring has a 

 beautiful red, yel- 

 low, and salmon- 

 colored lined water 

 outlet. 



Small pool close to it. 



White crater re- 

 ceives water from 

 overflow of Gian- 

 tess. 



