Deep Well at Minneopa, Minn. — Hall. 249 



6. Limestone of a light pink color and rather fine text- 



ure. This layer has the color and texture of 



the best stone in the Kasota quarries 10 ft. 126 ft. 



7. A rock of uneven hardness carrying many flinty 



chips, an arenaceous dolomite which breaks down 

 in warm hydrochloric acid with effervesence, 

 losing from 75 to 80 per cent, of its weight 14 ft. 140 ft. 



8. A green shaly sandstone whose lumps harden on 



exposure to quite a firm, distinctly stratified 



green sandstone 15 ft. 155 ft. 



9. A red sand easily crumbling (no sample) 30 ft. 185 ft. 



10. A green shale containing a considerable proportion 



of sand grains 20 ft. 205 ft. 



11. A clean white sandrock of medium texture and very 



friable (no sample) 30 ft. 235 ft 



12. A green shale again appears to be the predominant 



rock (no sample) 65 ft. 300 ft. 



13. Coarse, red, granular drillings which carry in num- 



erous small grains a dark green mineral. This 

 rock consists largely of a dolomitic material 

 and appears to be quite impervious, thus afford- 

 ing a cover to the water-bearing strata which lie 

 below 5 ft. 305 ft. 



14. A white water-bearing sandstone from which a 



small stream of water flowed 30 ft. 335 ft. 



15. A white and brown sand, very compact and ap- 



parently a cover to the layers below 40 ft. 375 ft. 



16. A white water-bearing sandstone 150 ft. 525 ft. 



17. A white water-bearing sandstone, differing but little 



from the preceding number 60 ft. 585 ft. 



[When the drill entered No. 16, water rapidly rose in 

 the well and long before the bottom of No. 17 was 

 reached a heavy volume was flowing from the 

 mouth of the casing. It completely filled a 5^ 

 inch pipe. In temperature this water is from 53 

 degrees to 55 degrees Fahr. and is comparatively 

 soft.] 



18. Sandstone and conglomerate. The workmen were 



still boring in this bed when Mr. Bierbauer closed 

 his notes; they had penetrated it 215 feet. In 

 places the rock was apparently a compact red 

 sandstone; in others it was a conglomerate made 

 up of pebbles of a bright red, vitreous, non-gran- 

 ular quartzite. In size they vary from a fraction of 

 an inch to several feet in diameter. The microscope 

 shows that the silicious cement in which the origi- 

 nal grains are imbedded is clear quartz interstitially 

 deposited in axialcontinuity with the grains them- 



