lOO J. B. TYREELL ON THREE 



was driven below the base of the sandstone and the water pumped out of it, the water 

 from the sides worked under the bottom of the pipes, and, washing in, carried sand along 

 with it, filling the well to a height of 70 feet. 



In the sandstone some little particles of coal were said to have been struck. 



Nos. 28, 29 and 30. — No specimens were obtained, but No 28 was described as a rotten 

 grey shale, very soft and sticky when cut up by the drill ; No. 29 as gritty, strong, black 

 shale, and No. 30 grey shale, similar to No. 28. All through this shale were little bauds 

 of sandstone from three to six inches in thickness, and some of the shale was very similar 

 to that overlying the sandstone. The beds evidently represent the base of the Dakota 

 formation, which, in its typical area on the Missouri River, consists of alternating beds of 

 shale and sandstone. 



No. 31. — Six specimens of the drillings were kept to represent this 88 feet of rock, 

 numbered in order from above downwards, but whether they represent the whole or only 

 a part of the series is quite uncertain. The record as received gives a red shale similar 

 throughout, from 412 to 440 feet ; at 455 feet thin beds of grey shale begin to make their 

 appearance, and lower down this is also stated to be intercalated with thin beds of lime- 

 stone. The specimens were stated to be characteristic of the whole thickness of beds, and 

 are as follows : No. 1 is a light bluish-grey, soft, argillaceous limestone, with a few grains 

 of well-rounded, clear quartz sand. No. 2, the same, mixed with some red shale. No. 3, 

 a brick-red calcareous clay in a finely divided condition. No. 4, a mixture of light-blue 

 argillaceous limestone and red clay, pieces of soft white sandstone, and aggregations of 

 small cubical crystals of pyrite. Among the washed material are some fragments of a 

 hard, gt^y, even-grained limestone, large and small rounded grains of clear quartz, a 

 fragment of whitish limestone very like the harder portion of the limestone at G-raud 

 Rapids near the mouth of the Saskatchewan river. No. 5, very similar to No. 3, but 

 lighter iu colour and not calcareous. No. 6, a mixture of red and blue clay, through 

 which are scattered many little fragments of a hard, compact, light bluish-grey dolomitic 

 limestone, a yellowish-white limestone containing a great number of grains of clear 

 quartz sand, aggregations of grains of sand and crystals of pyrite, large but well-rounded 

 grains of clear quartz, and a fine white and buff, well-roirnded quartz sand. 



No. 32. — A specimen labelled between 500 and 550 feet probably comes from this 

 band. It is a soft, white, porous and apparently massive limestone, in which are a great 

 number of small, flattened, sharply cut rectangular cavities, that have evidently been 

 occupied by crystals of chloride of soditim. This rock contains no traces of organic 

 remains, but small, clear crystals of quartz are quite plentiful. 



No. 33. — This band is simply a downward continuation of the others, and several 

 specimens were collected from it having the following characters : 



505 feet. — A mixtiire of red and grey, very slightly calcareous clay, with some small frag- 

 ments of light brown sandstone. 



509 feet — Similar clay, with fragments of limestone like No. 31. Also a whitish lime- 

 stone, in which are fragments of cylindrical fossils like Coleolus, a fragment of a 

 small shell like Pteriuea, with other indistinguishable fragments of shells. 



514 feet. — A mixture of light grey and red sandy clay, elfervescing freely in H.Ol. Other- 

 wise much like the last. 



