142 Mr. Prestwich on the Structure of 



Dockar's farm at Findon. The following sectional list shews the position of 

 this bed. 



1. Fragments of schistose rocks imbedded in a coarse, fer- 



ruginous, slightly micaceous sand 35 feet. 



2. Red clay* 2 — 



3. Grey clay, with Ichthyolites 4 — 



4. Grey shale, slightly micaceous, with a few scales of fishes 



and traces of vegetables 18 — 



5. Red conglomerate 5 — 



6. Coarse, red, micaceous sandstone, with remains of fishes. . 3 — 



7. Loose breccia, very similar to No. 1. 



The outcrop of the underlying strata may be traced in descending the channel of the brook. They 

 consist of thick beds of coarse, red conglomerate, separated by thin layers of micaceous, coarse, 

 red and grey sandstone, forming a total thickness of about eighty feet. The old red sandstone is 

 here brought up by a fault, which prevents the outcrop of tlie lower part of the red conglomerates ; 

 hut a better section of the latter, appears in the deep ravine, about a quarter of a mile west of 

 Mr. Dockar's. (See wood-cut). 



Clay and shale with Ichthyolites (Nos. 3 and 4 of the 

 preceding section) 



Conglomerates, and sandstones, with remains of fishes -i ^^ 



Coarse and thick-bedded, red conglomerates, with no 

 fossils 



The gradual passage of the clays, shales and sandstone into the thick, underlying conglomerates, 

 may be seen there to great advantage. The conglomerates become coarser, and are generally harder 

 as they descend ; and at the same time the inclosed rolled fragments, present a greater mineralogical 

 variety. Thus, the uppermost bed, which overlies the clay with Ichthyolites, consists almost solely 

 of angular fragments of schistose rocks, varying in size from one to four inches, and imbedded in 



* The red clay is of a variable thickness. Its colour appears to be owing to the percolation of 

 water through the overlying ferruginous breccia. 



