108 



MESSRS. JTJKES-BROWNE AND SCANES ON THE [Feb. IQOI, 



the components being chiefly minute quartz -grains, broken sponge- 

 spicules, and globular silica, with a scattering o£ very small grains 

 of glauconite and of broken glauconitic rods. 



Rye Hill Farm. (Fig 2.) 



We come next to the exposure near Eye Hill Farm, which is 

 about 3 miles east-north-east of Maiden Bradley. This exposure 

 was mentioned by one of us when discussing the Warminster fauna 

 in 1896/ and was more fully described in a recent memoir of the 

 Geological Survey .^ It is important because it includes the junction 

 of the sands with the Chloritic Marl; but it is unfortunately very 

 small, consisting only of two holes from which sand has been dug 

 for use on the farm. 



These two pits supplement one another : one showing a marly sand 

 with scattered brown phosphates, passing down into light green 

 sand without phosphates ; the other showing the same green sand 

 passing into sand which contains many concretions like the Corn- 

 stones of Maiden Eradley, with sand again below. The second 

 hole, however, has been dug in such a manner that it is not easy 

 to measure the vertical thickness of the beds exposed ; we therefore 

 decided to have the other pit dug deeper, so as to get a clear vertical 

 section. This was done in September 1900, with the result that 

 the account previously published was found to require some modi- 

 fication. The thickness of the fossiliferous sand was found to be 

 less than had been supposed, and the freshly-cut section was much 

 more easily and satisfactorily correlated with that at Maiden 

 Bradley. The succession is illustrated in fig. 2, below : — 



Fig. 2. — Section at Bye Hill Farm. 



Feet. Inches. 

 Chloritic Mar 1,— Sandy glauconitic marl, with 

 phosphatic lumps and phosphatized fossils 2 



IG-reenish-grey glauconitic sand, with many fossils 

 but without phosphates ; mostly soft, but with 

 some roundish concreted lumps of sand 1 2 



X Soft yellowish-brown sand, with a few hard con- 



S creted lumps and many fossils 5 



) Greenish sand, with many oval calcareous concre- 



\ tions (Cornstones) and some fossils... from 6 inches to 9 



Soft greenish-grey sand, with scattered calcareous 

 concretions; few fossils 2 3 



[ Vertical scale : 1 inch = 4 feet.] 



1 A. J. Jukes-Browne, Geol. Mag. 1896, p. 261. 



2 Mem. Geol. Surv. 'Cretaceous Eocks of Britain' vol. 



& Upper Greensand of England ' p. 240. 



(1900) 'Gault 



