14 



ILLINOIS STATE GEOLOGICAL SURVEY 



LOG. 10- TYPE GLEN DEAN 



0) 



o. 



e 



ii 



Covered /^ 





z 

 < 

 lij 



Q 



liJ 



-1 

 CO 



. . . /5 



J'^ 



Limestone, tannish-gray, medium to 1 



|.o 



qrained, crinoidal. 13' 1 



E 



1 



fitiale, dark grov in uDOer 1-1/2. \^ ' 1 ' 

 dark red and greenisti-gray in middle, J_—^_ 

 and dark gray in lower 2-1/2'. /IE-=_ 



<CD 









Shale, greenish-gray. 1 6 ^~^=-=~' 



Fig. 10. — Type Glen Dean, locality 10. Cut on east 

 side of road (abandoned railroad) about 0.8 

 mile N. of post office in Glen Dean, Carter co- 

 ordinates 2-N-36, 1850 feet S. of N. line, 9025 

 feet W. of E. line of quadrangle N-36, Glen 

 Dean quadrangle, Breckenridge County, Ken- 

 tucky. 



by no means common. For practical pur- 

 poses the groups of conodonts from the 

 two units are indistinguishable. 



Conodonts from the Illinois and Indiana 

 sections are nearly identical, both as to spe- 

 cies present and the relative abundance of 

 the species. Kladognathus is less common 

 in Indiana; Spathognathodus campbelli 

 was found in only one section, locality 2, in 

 southwestern Illinois; Lonchodina cf. L. 

 paraclarki was found only in the three In- 

 diana sections. Otherwise the species coin- 

 cide. 



Southern Faunal Province 

 In the south part of the area studied 

 there is a noticeable change in the fauna, 

 as shown by comparing species collected at 

 localities 7 and 8 in Christian and Butler 

 counties, Kentucky, with those from the 



LOG. I I - LUTGRING 

 QUARRY 



Shale, gray and tan, silty, 

 micaceous with some sandstone 

 lenses. I0'4" 



Limestone, medium to dark gray, 

 sandy with sandstone at 

 base. 5' 



Shale, dark gray, silty, 

 calcareous, fossiliferous, 

 micaceous. 6' 



Shale, dark gray, hard and 

 siliceous sandstone 

 interbedded. • 5' 9" 



Limestone, gray, fragmental, 

 fossiliferous, interbedded with 

 gray shale, fissile above, fossil- 

 iferous and calcareous below. 7'3" 



Shale, medium to dark gray, 

 silty, calcareous, fossil- 

 iferous. 6' 



Limestone, tannish-gray, 

 medium to fine-grained, 

 crinoidal in part, 

 oolitic in part, 

 dolomitic in part 

 with lateral variations. 



23' 



Shale and gray fossiliferous 

 sandstone. I'S" 





CO 

 V) 



Fig. 11. — Lutgring and Sons Quarry, locality 11. 

 Abandoned quarry about 0.6 mile E. of 

 Branchville, NWi/4 NWi/4 sec. 18, T. 4 S., R. 1 

 W., Perry County, Indiana. 



other sections (table 1). Two differences 

 are not shown by table 1. First, Cavusgna- 

 ihus crista ta is of slight importance in the 

 northern sections but is the most common 

 species of Cavusgnathus to the south, and 

 second, Neoprioniodus varians is an impor- 

 tant element in the fauna only at locality 8 

 where it is more abundant than A^. scitulus. 



EXPLANATION OF PLATE 3 



All figures X 40 

 Numbers in parentheses after explanations refer to locality and sample numbers, for example 



(12-7) refers to locality 12, sample 7. 



Figure 

 1-4 



5 

 6 



7. 8 



9-14 



Ligonodina roundyi Hass; 1, posterior view (12-7); 2, inner lateral view (6-1); 3, 



anterior view (12-20); 4, posterior view (12-4). 



Kladognathus mehli (Rexroad); inner lateral view (2-10). 



Kladognathus prima (Rexroad); inner lateral view (3-6). 



Ligonodina ohunca Rexroad; 7, inner lateral view of a young specimen (12-2); 8, 



outer lateral view (12-21). 



Ligonodina hamata Rexroad; 9, anterior view (11-23); 10, 11, inner lateral and outer 



lateral views of young specimens (12-2 and 12-3); 12-14, inner lateral, outer lateral, 



and inner lateral views of mature specimens (1-61, 1-60 and 1-61 respectively). 



