668 JESSE E. HYDE 



the area within short distances suggests strongly that this con- 

 glomerate mass is not one of great extent, and that the more easterly 

 outcrops are really on the eastern side of the conglomerate area. 

 That these are true beds is shown by the occasional occurrence of 

 ripples on their upper surfaces or of a very thin parting of clay 

 shale between two incHned sandstone beds. Such a feature may 

 be found along a bedding-plane from the point of its emergence 

 near stream level to its disappearance near the top of the inclined 

 beds. 



Although the inclination of the larger beds of the region is quite 

 regular, the structure within these beds presents the greatest 

 diversity. The material is very coarse sand with abundant pebbles, 

 and evidence of strong current action is seen. Cross-bedding is 

 everywhere present in the inclined portions. These minor struct- 

 ures follow no appreciable order. The cross-bedding is in any 

 direction. It may be in opposite directions in superjacent beds 

 and often is inclined directly against the slope of the larger beds, 

 contradictory as it may seem. Erosion planes are abundant; 

 although local and limited in extent, these are true local erosion 

 planes which can frequently be traced for many yards along an 

 outcrop, and appear to be distinct from the small cuttings which 

 are always found where there is evidence of current action and 

 which are usually referred to simply as cross-bedding. To the 

 eastward the Black Hand goes under cover with these structures 

 yet present, but on the western side of the conglomerate area the 

 bedding gradually flattens out and the current structures and cross- 

 bedding disappear together with the pebbles, so that within a mile 

 or two the member becomes a more or less structureless (except for 

 ordinary bedding-planes), coarse sandstone. This is the way it 

 occurs at Clay Lick only two and one-half miles west of where the 

 structures are at their maximum of development. And only a 

 short distance west of Clay Lick, thin clay shales begin to appear 

 below the massive upper loo feet or Black Hand member. These 

 suggest that the Granville shale province is being approached and 

 also fairly well demonstrated that the upper loo feet more or less of 

 sandstones in the Toboso province constitute a member distinct 

 from the sandstones below it reported in the well. 



