KINDERHOOK FORMATIONS OF MISSOURI 139 



place 1 as follows : "a number of fragments of the typical sand- 

 stone with fish teeth were found on the slope. A hurried search 

 did not discover this sandstone uncovered." If this last state- 

 ment be correct, it is difficult to see how the fact stated in the 

 first of the above quotations can be demonstrated. Another 

 locality mentioned where the Louisiana limestone is said to be 

 " associated with the Devonian " is on the Cochran farm. The 

 so-called Devonian described at this locality is the Sac limestone 

 and "loose fragments" of Phelps sandstone in which "no fish 

 teeth were found." In neither of these localities is it demon- 

 strated that the so-called Louisiana limestone and the Sac lime- 

 stone are distinct formations separated by the Phelps sandstone. 

 The loose fragments supposed to belong to this sandstone can 

 be of no value in elucidating the stratigraphy. In none of the 

 other localities given for the Louisiana limestone is there any 

 evidence given to show that the formation is distinct from the 

 Sac limestone, and the careful reader of the Greene county 

 report is forced to the conclusion that its author mistook mere 

 lithologic variations of a single stratigraphic unit as two distinct 

 formations. A careful search for fossils, however, should be 

 made in the outcrops of so-called Louisiana limestone, for the 

 purpose of demonstrating its identity with the Sac limestone. 



Phelps sandstone. — This formation has been examined by the 

 writer only at its typical locality in the neighborhood of the 

 Phelps mines. It has been recognized by Shepard, however, as 

 a more or less continuous formation throughout the area cov- 

 ered by his report, and is frequently characterized by the water- 

 worn fragments of fish teeth. At the Phelps mines these teeth 

 are somewhat abundant, but are so waterworn that in every 

 specimen observed the original form has been destroyed. Some 

 of these specimens have been identified by Shepard as Ptyctodns 

 calceolus, and it was chiefly from the evidence of this identifica- 

 tion, with no knowledge of the invertebrate fauna of the Sac 

 limestone, that the Phelps sandstone was referred to the Devo- 

 nian, such a reference carrying with it, of necessity, all the 



1 Loc. cit., p. 81. 



