MINEOLA LIMESTONE. 19 



more is the cpmmonest overlying formation and the Chouteau 

 only rarely comes in contact with it. Very rarely Pennsylvanian 

 formations come in contact with it where deep valleys were 

 excavated in pre-Pennsylvanian time and filled during the 

 Pennsylvanian. 



The Callaway is in contact with Mineola at location 4, at 

 the mouth of Cow Creek in Callaway County, at location 6, 

 near New Florence in Montgomery County, and at numerous 

 other places. 



The Sylamore is the overlying formation in Sec. 6, T. 46 N., 

 R. 5 W, 2 miles west of Big Springs in Montgomery County, 

 Sec. 17, T. 47 N., R. 5 W, Montgomery County, and in many 

 areas in western Warren County. 



The westernmost outcrop of Mineola is at the mouth of Cow 

 Creek in eastern Callaway County, locality 4. The granular 

 crinoidal phase is present but is not indentified as Mineola without 

 reservation. No diagnostic fossils have been recovered from it 

 and it is not sharply differentiated from the Callaway above. 

 In the Mineola region in western Montgomery County the second 

 phase of the formation is well developed, reaching a thickness of 

 more than 20 feet, and is continuous for four or five miles. , Good 

 outcrops occur in sections 11 and 12, T. 48 N., R. 6 \V. The 

 granular crinoidal phase is also present here, but is patchy. It 

 outcrops near the tops of the hills about three-quarters of a mile 

 west of Mineola, and is about five feet thick at a maximum. 



In southeastern Montgomery County the crinoidal phase is 

 widespread and often reaches a thickness of 10 to 15 feet, while 

 the other phases are only rarely present. Patches of a yellowish- 

 gray, sandy limestone which is highly fossiliferous, occur here 

 and there. This phase, never more than two or three feet 

 thick, always lies at the bottom of the formation, and was the 

 first deposit of the advancing seas. The best place to examine 

 outcrops is in Sec. 20, T. 47 N., R. 5 W., about 3 miles northwest 

 of Big Springs, where it rests on the Joachim. 



On the headwaters of W hippoorwill Creek, in Sec. 3, T. 

 47 N., R. 5 W'., about five miles southeast of New Florence, the 

 crinoidal phase, about five feet thick, occurs at the top and 

 beneath it about two feet of the brown phase, resting on the 

 Kimmswick. The brown phase bears great numbers of fossils, 

 many of which are well preserved. 



In Warren County the Mineola occurs only rarely and the 

 only phase observed was the crinoidal. It outcrops in only a 



