List of Illustrations 



Figure Page 



1. Stylolites in the Muschelkalk, showing striated side-surfaces and clay 

 caps 8 



2. Large,, perfectly formed stylolites of the Salem limestone 8 



3. T>'pical, jagged stylolite-seam in the Salem limestone 9 



4. Small stylolite-surface in the Salem limestone, showing the character- 

 istic roughness which has the physical appearance of solution 9 



5. Block of Salem limestone split along a large stylolite-seam 11 



6. Stylolite-surface in the Mitchell limestone^ showing the thin deposit 



of black residual clay 12 



7. Fractured type of impressed pebble from the Karbonformation 17 



8. Solution type of impressed pebble from the Nagelfluh 17 



9. Diagram of the contact of two impressed limestone pebbles showing 

 the minute interteething 19 



10. Enlargement, 50 diameters,, of the intertoothed contact of two im- 

 pressed limestone pebbles. Fig. 9 19 



11. Diagrammatic sketch of the large, perfectly formed stylolites of the 

 Salem limestone, such as are foimd in the Dark Hollow district, 

 Lawrence County, Ind 39 



12. Thirteen-inch stylolite in the buff Salem limestone 39 



13. Complex stylolite-seam of the Salem limestone 41 



14. Diagram of a small, jagged stylolite-seam of the lower Harrodsburg 

 limestone 41 



15. Typical stylolite-seam as it appears on a sawed surface of the Salem 

 limestone 42 



16. Diagram of the small, finely toothed type of stylolite-seams, common 



to the Mitchell limestone 43 



17. Stylolite-seam which leaves the bedding plane and cuts across the 

 lamination of the upper stratum at an angle of about 20 degrees 44 



18. Pile of waste stone, a result, for the most part, of stylolite-seams ... 45 



19. Limestone bowlder channeled by water containing carbon dioxide. . 48 



20. Undulating solution seam, containing three-eighths of an inch of black 

 residual clay 52 



21. Stjdolitic portion of the seam sho^ra in Fig. 20 52 



22. Diagram of stylolite-seam along an inclined bedding plane, where 

 the position of the individual columns is vertical 54 



23. Semi-diagrammatic sketch, showing the relation of stylolites to the 

 lamination of the rock 56 



24. Semi-diagrammatic sketch of a stylolite-seam occurring at the 

 jimction of a cross-bedded stratum and a horizontally laminated one. 57 



• 25. Diagram of a small stylolite-seam partially eradicated by the pene- 

 tration of upward-pointing columns of a larger stylolite-seam 58 



26. A typical, large stylolite-seam in the Salem limestone of the Dark 



Hollow district, Lawrence County, Ind 60 



(4) 



