814 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Maf. 18, 



not so, however, is, I think, made manifest by a careful examination 

 of all the beds which occupy the interval between the Oolite-marl and 

 the base of the Bagstone, where they occur in situ. Leaving the 

 Boiling Bank Quarry, which has been opened into " tumbled oolite' ' 

 resting upon the Upper Lias Clay, and ascending the hill in an 

 easterly direction, we come to two quarries situated in the Lower 

 Freestone, and in the higher of the two, distant from the Boiling 

 Bank Quarry about 200 paces, the Oolite-marl occurs, 9 or 10 feet 

 thick, resting upon the Lower Freestone, and overlain by 5 feet 

 of the Upper Freestone. The hill rises only a few feet above the top 

 of the quarry, and a little further on, at the very summit of the hill, 

 is a second quarry. The lowest beds on the western side of this 

 quarry belong to the base of the Upper Freestone, and, formerly, a 

 portion of the upper part of the Oolite-marl was also exposed. 

 These beds, which dip slightly towards the east, pass upwards into 

 a brown, calcareous, sandy rock, the uppermost stratum of which is, 

 in parts, composed entirely of yellow and brownish sand. Besting 

 upon this, and immediately under the turf, on the eastern side of the 

 quarry, is the Lower Trigonia-grit, with Terebratula impressa, Tri- 

 gonia costata, Goniomya angulifera, Ceromya Bajociana, Myacites, 

 Gresslya, and many other fossils. 



These beds are ag'ain seen in a third quarry, a little further on in 

 the same direction. Eleven feet of rock are here exposed, the upper 

 three feet of which are sandy and ferruginous, and similar to the top- 

 beds in the last quarry. The lower eight feet consist of brown sandy 

 oolite, moderately thick-bedded. Neither the uppermost nor the 

 lowermost beds can be seen; but, close by, at only 3 or 4 feet 

 higher elevation, the junction of the former with the Lower Trigonia- 

 grit may be seen in some small superficial excavations which have 

 been made in searching for the sand, which here and there occurs at 

 the top of the Upper Freestone. 



The junction of the Upper Freestone with the overlying Lower 

 Trigonia-grit is, however, better seen in a number of small pits 

 along the north side of the ravine which lies a little to the right. 



From all these exposures the following section may be con- 

 structed ; — 



Section of the Rolling Bank Quarry. 



A. Lower Trigonia-grit. feet. 



a. Bubbly limestone, with many fossils — Corals, &c. . . 



b. Brown and blue clay 1 to 2 



B. Upper Freestone. 



a. Hard, brown, coarse-grained limestone, with frag- 

 ments of Shells, not persistent , 6 in. to 2 



6. Yellow and brownish sand, with lenticular masses of 



sandstone 3 



c. Ferruginous arenaceous limestone and sandy oolite, 



the lowest bed pierced by the vertical tubes of 

 Annelids, about 14 



