342 Mr. Weaver's Geological Observations on 



In the eastern brow of ditto, facing Charfield Tg^-o ^y 

 green, ....... J 



In the ridge at Wickwar, . . . . 30° W. 5° N. 



I have no where observed any vestige of organic remains in this sandstone, 

 except in its north-western extension from Milbury heath to a place called 

 the Nap, on the road toward Thornbury, distant about a quarter of a mile 

 from the Bristol road; where I found it containing a few impressions, resem- 

 bling the stems, or stalks and branches, of plants *. The sandstone here pre- 

 serves the north-westerly dip. About a quarter of a mile further to the west, 

 it is overlaid by the calcareo-magnesian conglomerate. 



§ 20. The limestone also is inclined at various angles in different parts of 

 its course. Thus the strata are found inclining, — 



In the northern portion of the field; — 



adjacent to the sandstone, . . . 10° | 



I 



upper part of Layhill, nearly horizontal ; and l + xi, o o^o \\r 



loo /tothe». do W. 

 then, . . . . . . 12 / 



Layhill quarry f , . . . . . 16° I 



In the eastern portion of the field ; — 



In the eastern quarries, west quarter, . 13° S. 30° W. 



east quarter, . 13° W.30°S. 



In the ridge extending to Wickwar, "i 15° to more and more 



gradually increasing from, . . J 35° toward the W. 



In the western portion of the field ; — 



At the northern end of the lake in Tort- ^ 



worth park, — and thence, . . I J to the S. 35° E. 



In the ridge on the west of the lake, . | | S. 25' E. 



Extending toward Stanley's wood, . -^ ^ S. 20° E. 



In Stanley's and Prest's woods, . . 40° S. 20° E. 



Through John's wood, . . . 60° S. 30'" E. 



In the Tytherington ridge X, . . 67° S. 25° E. 



But where in immediate contact with the old^ 10° a 



red sandstone of Milbury heath, high up >to > S. 20° E. 



on its eastern flank, the dip is only . J 15° J 



* An analogous occurrence has been noticed by Dr. Bright in the old red sandstone near 

 Bristol. Geol. Trans, vol. iv. p. 201. 



+ The strata are here from 2 to 4 feet thick, intersected by slight rectilinear cross fissures ; one set 

 of fissures ranging east 35° south, and dipping 82° toward the north-east, the other ranging north 35" 

 east, and dipping 80° toward the north-west. Hence the strata have a tendency to divide into 

 rhomboidal masses : a structure not uncommon in continuous limestone, as well as in many other 

 rocks, and which has often led to the confounding of seams of division with those of stratification. 



t In the prolongation of this body of limestone to the south-west, the same disposition may be 



