THE GRAFTON ARTESIAN WELL, 77 



WELL AT GRAFTON, N. DAK. 



The city of Grrafton is also on the Red River Valley plain, being situ- 

 ated 12 miles west of the river and 40 miles south of the international 

 boundary, at an elevation of 825 feet above the sea. Its distance from 

 Humboldt is about 38 miles to the south-southwest. The following record 

 of the boring here was made by the engineer in charge during the prog- 

 ress of the work, and was supplied to me by the mayor, Mr. J. Tombs, at 

 the time of my visit to Grafton in the survey of the shore-lines of Lake 

 Agassiz. It has been published by the Dakota commissioner of immi- 

 gration.^ 



Section of an artesian tvell, Grafton, iV". Dak. 



Feet. 

 Black loam 3 



White clay 25 



Blue clay 250 



Hardpau 20 



Limestone 137 



Quicksaud 20 



White, coarse sand 45 



Slate 3 



Sandstone, yielding a copious flow of bi-ackish water 25 



Red shale 60 



Blue shale 16 



Pink shale 11 



Gray gravel 49 



Red shale 46 



Soapstone [clayey shale] 188 



Sandstone, yielding a small flow of very salt water 5 



Gianite 12 



Total 915 



Glacial drift, doubtless mostly till, with a thin covering of lacustrine 

 and alluvial clay, reaches to the depth of 298 feet. 



The limestone next encountered, with a thickness of 1.37 feet, evidently 

 is the lower portion of the thick formation of limestone of Galena and 



' Resources of Dakota, 1887, p. 188. 



