32 L. Michardson — BZ/cetic Hocks of Waricicksliire. 



"White-Lias beds are not so arenaceous as his statement that they are 

 ' somewhat sandy ' woukl lead one to suppose.^ 



Between Harhury and Ufton there are two quarries in the White 

 Lias, and formerly there were extensive workings at Stoneythorpe.- 



Alany fossils from the White Lias have been obtained from Bascote, 

 Print Hill, and the neighbourhoods of Long Itchington and Stockton. 

 Some are now housed in the Museum at Warwick. 



There are no sections of the Ehtetic beds between Long Itchington 

 and Church Lawfoi'd. 



At Church Lawford, however, the buried escarpment of the Rhsetic 

 is cut tlirough by the Rugby and Coventry Branch of the London and 

 North-Western Railway. At the time that the railway was constructed 

 there must have been displayed a most interesting section, showing 

 the sequence of deposits from the Red Marls of the Keuper to the 

 Anf/ulatus-^eds of the Lower Lias. But now nothing more than 

 the White Lias, the very bottom-portion of slialy clays and Drift, 

 can be seen : all the other beds are hidden by grass. 



The White Lias is much fissured, the cracks are filled in with 

 calcite, and in places it is very ferruginous. The beds on the whole 

 are singularly barren of fossils, and the top-band is " pebbly " and has 

 a waterworu, bored, and pitted upper surface. A similar bored bed 

 has apparently been observed in 



"the bed of the Church Lawford Brook, on the left-hand side of the road. 

 The surface of the rock pierced by these worms is very peculiar and striking, 

 every square inch being indented with their burrows ".^ 



Resting directly upon the White Lias are claj'ey shales. The 

 greater portion of these shales is replete with the radioles and portions 

 of the tests of Cidaris. Owing to the long exposure of the clay-banks 

 remains of specimens of Cidaris appear to occur in the bottom-portion 

 of the clays on top of the White Lias ; but Mr. E. Cleminshaw tells 

 me that he has collected examples of Amvionites planorbis here, and 

 he thinks that about the lowest 3 feet of the shale-deposit belongs 

 to the Planorh is -Zone. The 6V«'flr/«-Shales appear to be comparable 

 with those that were exposed in the cuttings on the new South Wales 

 Direct Line near Chipping Sodbury.* There they were separated 

 from what remains of the White Lias by the Ostrec(r- and Torus- (or 

 «/o/«?;s^oM/)-Beds : the true Phmorbis-Zone Avas not represented. Here, 

 on the other liand, the Ostrca-Beds do not appear to be represented : 

 the Planorbis - Shales apparently rest non - sequentially upon the 

 White Lias. 



The Cidaris-Sihales are succeeded by the An(/idatiis-Beds, whose 

 limestones — usually with those of the overlying Bucklandi-'Beds — 

 are so extensively worked for burning for lime at the large 

 Portland Cement Works at Newbold-on-Avon,* New Biltou (near 



•• The Jurassic Rocks of Britain — The Lias, etc., vol. iii, p. 159, 1893. 



- Q.J.G.S., vol. xl, p. 364, 1884. 



^ T. B. Oldham, Keport Kugby Sob. Nat. Hist. Soc, 1879, p. 11. 



^ Q.J.G.S., vol. Iviii, pp. 720-1, 1902. 



^ In some of the indurated shales Ostracoda are very abundant, together with 

 specimens of Pseudomonotis papyria (Qu.), and indicate precisely the same 

 horizon as at Maisemore, near Gloucester (Proc. Cotteswold Nat. F.C., vol. xv, 

 pp. 256-62). 



