128 



THE GEOLOGIST. 



5. Stiff Blue Clay . 5 feet . With. Ammonites Henleyi, Pemaventricosa, 



and Myacites. 



(3. Hard stilf Blue Clay 12-! 4ft. With Ammonites fimhriatus, A. margari- 



tatus, A. Henleyi, Ferna ventricosa, and 

 small Pentacrinite. 



7. An irregular band of lime- Unicardiii/m cardioides, Cardinea concinna, 

 stone Jjenerally formed of Myacites tumidns (?), Modiola scalprum, 

 a mas's of shells GermlUa Icevis, Ferna ventricosa, Lima 



(small), Ostrea (small), Fee ten sublcems, 

 Flagiostoma Hermanni, Terehratula nu- 

 mismalis, Rhynchonellafwcillata, R. con- 

 cinna, R. suhconcimia^ Pentacrinus. 



The upper shelly bed (No. 2) undulates ; the distance between the 

 crest and the trough of the wave being about a hundred yards, and 

 the depth of the trough about six feet. This is very much stained 

 with oxide of iron. 



The clayey beds Nos. 3, 5, 6, have fossiliferous concretionary nodules, 

 and are all very similar ; they contain but few fossils, and those mostly 

 of the same species. Bed No. 7 is also stained with iron, but not so 

 much so as bed No. 2, It is very irregular as to its composition ; 

 the stony bed being often interrupted by coarse concretionary masses 

 at some distance from each other. This bed I also found at Odding- 

 ton, four miles from the railway-cutting ; and there it is only just be- 

 neath the surface-soil, so that there must have been considerable 

 denudation. 



I should think that the Upper Lias Clay is much thicker in this 

 locality and at Chipping-Norton than is generally supposed. Mr. 

 Bliss, the owner of the factory there, told me that he bored 500 feet 

 without getting through the clay. This is where it crops from be- 

 neath the Inferior Oolite. 



Though the beds above described may possibly belong to the 

 Middle Lias, yet I think there is much evidence to the contrary, 

 such as the close contiguity of the Inferior Oolite, especially the 

 " passage-sands," with the ferruginous ammonite-bed. At Odding- 

 ton, about three miles from the cutting, these sands rest directly on 

 bed No. 7 of the section. 



TEAILS, TRACKS, AND SURFACE-MAEKINGS. 



By T. Eupert Jones, E.G.S. 



Geologizing, with some friends, on the south coast of the Isle of 

 AVight, a few summers since (1859), we noticed some puddles of 

 rain-water in tlie clay talus of the Wealden Clilfs near Brook Point, 

 and observed that, o[\\cv such surfaces, the partially dried clay 

 bods of the diiniuislKHl ])ools showed rain-prints, foot-tracks, trails, 

 and tlic riiios o\' hwAicw bubbles. Amongst these various markings are 

 convex trail-like lines (fig. 1), which at first appeared difficult to account 



