ILLUSTRATIONS 



Plate I. Geologic map of the Southeastern Missouri barite 



district, 

 Plate II, Geologic sections of the Southeastern Missouri ba- 

 rite district, 

 Plate III, (Figures slightly reduced), 



Fig;»A, Edgewise conglomerate, Elvins formation. 

 Fig. B. Potosi dolomite (gray), drusy quartz 



(white). 

 Fig, C. Barite showing casts of brecciated dolomite. 

 Fig, D, Crested barite. 

 Fig. E. Banded quartz and chalcedony. 

 Plate IV, Fig, A, Barite vein, quartz along the walls. 

 Fig, B, Typical radiating barite on quartz. 

 Fig. C. Disseminated barite (white) in dolomite. 

 Fig. D. Crystal of barite (one-half size), Miller 



County, Mo. 

 Fig. E. Crystal of barite with white border, Pettis 

 County, Mo. 

 Plate V. Fig. A. Crossbedding in the Elvins dolomite. Cali- 

 co Creek. 

 Fig. B. Drusy quartz from the Potosi dolomite. 

 Shows typical convex surfaces. 

 Plate VI. Fig. A. Pitted Proctor dolomite. 



Fig. B. Fault plane betvv^een the Potosi dolomite 

 and the Elvins formation, Fertile Creek. 

 Plate VII. Fig. A. Cone-shaped masses of barite, Wilson 

 Creek diggings. 

 Fig. B. Veins of barite in the Proctor dolomite. 

 Plate VIII. Fig, A. Vein of barite (6 to 8 inches thick) in 

 cave deposit at Henley, Mo. 

 Fig. B. Barite in cave deposit at Henley, Mo. 

 Plate IX. Fig. A. Residual barite (a), and drusy quartz in 

 gully beside a road near Richwoods, Mo. 

 Fig. B. Windlass and buckets used by the barite 

 miners. 

 Plate X. Section of pit showing method of mining. 



