﻿530 MR. F. R. C. EEED A^'D PEOJc. S. H. EEYXOLDS OX [Xov. I908. 



opinion that a thin representative of the Ludlow Series 

 occurs in the Tortworth area. 

 Xo. 4 was carried to a depth of 4 feet in superficial material, 

 and in clay with bits of sandy limestone containing crinoids 

 and obscure brachiopods. 



Material similar to that occurring in trench jS'o. 3, and especially 

 red calcareous sandstone full of lamellibranchs, is thrown up by 

 the plough in large quantities in the fields between Tortworth 

 Farm and Daniel's Wood; and there can be no doubt that this 

 area, which is shown on the Geological-Survey map as Llandovery, 

 is mainly occupied by post-Llandovery strata. We found Cornulitea 

 serpularius and abundant examples of Pterincea retrqflexa and 

 crinoid-stems in the blocks of red calcareous sandstone mentioned 

 above ; and Lord Ducie's collection contains Cormdites serpulcunus, 

 Ctenodonta sp., Modiolo2:)sis sp., Pterincea sp., and Pt. orbicularis, 

 labelled ' Tortworth ' and occurring in a similar rock. 



All the Wenlock exposures hitherto described (except those in 

 the Whitfield Quarries where the outcrop swings round to the 

 west) dip in an easterly or south-easterly direction at a not very 

 high angle, and their outcrop follows more or less regularly that of 

 the Old Eed Sandstone. The little stream, however, which flowing 

 through Daniel's Wood joins the main stream about 300 yards 

 south of Oldbrook Parm, shows Wenlock strata the dip of which 

 is in an altogether difi'erent direction, being in the main north- 

 westerly and often at a very high angle. These high and 

 discordant dips are readily explicable, as due to the reversed fault 

 which we believe runs along the western side of Daniel's Wood 

 and brings the trap over the Wenlock. 



The strata occurring in the bed of the little stream were described 

 in the former paper (to which we have several times referred) 

 and an illustrative section was there given.^ The greater facilities 

 for observation now available show that this section is incorrect, and 

 that the Llandovery of Daniel's Wood overlies, not underlies, the 

 trap — the stream for part of its course flowing not far from the 

 junction between the two, and exposing now the Llandovery, now 

 the trap. 



As has already been stated, the Wenlock strata are seen in 

 the stream-bed some little distance west of the wood, dipping 

 north-westwards at 30^; farther east the dip rapidly increases, 

 until at the edge of the wood it is 75°, and just within the wood 

 the beds are vertical. Vertical strata continue for the next 

 25 yards or so, and at one point the rocks are slightly inverted 

 so as to dip east-south-eastwards at a very high angle. Then, for 

 some 15 yards the stream follows the strike, the beds retaining 

 their vertical position. We found a few fossils of possibly Wenlock 

 type — Orihonota sp., crinoid-stems, and RliyncJionella nucida — at 

 this point. Then for some 40 yards there are no exposures, which 

 is unfortunate as we cross here the line of the fault, the next 

 exposure being of trap. Other trap-exposures occur for a distance 



^ Quart. Journ. Geol. Soc. vol. Ivii (1901) p. 273, fig. 1. 



