178 OLDER PLIOCENE PERIOD. [Chi Xlll. 
No. 37. No. 38. 
Bent strata of loam in the cliffs between Folding of the strata between East and 
Cromer and Runton. West Runton. 
In the last of these cuts a central nucleus of sand is sur- 
rounded by argillaceous and sandy layers. This phenomenon 
is very frequent, and there are instances where the materials 
thus enveloped consist of broken flints mingled with pieces of 
chalk, forming a white mass encircled by dark laminated clay. 
The diameter of these included masses, as seen in sections laid 
open in the sea- cliffs, varies from five to fifteen feet. 
East of Sherringham, a heap of partially-rounded flints, 
about five feet in diameter, is nearly enveloped by finely-lami- 
nated strata of sand and loam, and some of the loam is entangled 
in the midst of the flints. 
No. 39. 
Section in the Cliffs east of Sherringham. 
a, Sand and loam in thin layers. 
In this and similar instances, we may imagine the yielding 
strata, a, to have subsided into a cavity, and the flkits belong- 
ing to a superincumbent bed to have pressed down with their 
weight, so as to cause the strata to fold round them. 
That some masses of stratified sand and loam have actually 
sunk down into cavities, or have fallen like landslips into ravines, 
seems indicated by other appearances. Thus, near Sher- 
ringham, the argillaceous beds, a, represented in the annexed 
diagram (No. 40), are cut off abruptly, and succeeded by the 
vertical and contorted series, b, c. The face of the cliff here 
