‘DEPOSITION ON CONTINENTAL SHELF AND SLOPE 159 
TOM kopset DedSuacra ace Coarse- to fine-grained sandstone, arkose, and grey- 
wacke, with interbedded shale or argillite. 
o- Foreset beds. -.22-- More or less calcareous bluish mudstone or green- 
sand. 
SrakelagicsbedS:ee- asm: Argillaceous to pure limestone, perhaps glauconitic, 
or somewhat sandy. 
4 Topset beds.......- As above. 
6 Foreset beds: ... 2 .: As above. 
5) Pelagic beds4. 42. As above. 
4 Topset beds. 
3. Foreset beds. 
2 Pelagic beds. 
1 Topset beds. 
Farther seaward there will be no intercalations of topset deposits, 
but an alternation of limestone bands with bluish mudstone, 
Fic. 8.—Enlargement of the portion ABC of Fig. 7 
marl, or greensand. In this way may perhaps be explained the 
intercalation of the Amuri limestone of New Zealand, between 
mudstone and marl in Marlborough, and between greensand and 
glauconitic sandy limestone passing upward into marl in North 
Canterbury, and also the intercalation of the Oamaru limestone 
between beds of greensand in Otago, New Zealand. 
The intercalations of foreset beds in the pelagic deposits will 
become more calcareous and thinner and will finally die out sea- 
ward. Obviously, under certain conditions of restricted waste 
supply this may occur in moderately shallow water, the proportion 
of foreset beds in the whole mass of sediment being very small. 
In Fig. 7, which is designed to represent the vertical distribution 
of lithological types, the continuity of strata is not apparent, but 
in Fig. 8, which is an enlargement of the portion ABC of Fig. 7, the 
