PLASTIC CLAY. 
65 
with the beds of the Plastic clay formation in many 
otlier parts of France ; particularly at Marly, and 
in the Soissonnois, where similar organic remains 
occii})y strata disposed in the same manner, and 
identical with those near Dieppe. 
In the preceding sketch of the strata of the 
Plastic clay of Sussex, the geologist will imme- 
diately recognise tlie usual characters of that 
formation, which, “ viewed on an extended scale, 
is composed of an indefinite number of sand, clay, 
and pebble beds, irregularly alternating ; the dis- 
tribution of the organic remains, like the alter- 
nation of the strata, being exceedingly variable : 
sometimes they occupy the clay ; at other times 
the sand or pebbles ; and very frequently are alto- 
gether wanting in both.” * 
• Geological Transactions, vol. iv.* 
