To face p. 331. | 
BLE OF THE NEOCOMI 
| 
| 
| | 
YorRKSE Houanp. 
Gault. Hunstanton ck. ? 
(Albien, D’ Ord.) 
I | 
| U pper [ 2 
N ee : Black clays 
tien 
D Orb; Rhoda- | Danks (alias alae ? 
nien and Aptien, | “‘ Cement-beds 
Renev.) ea 
| awa Dark blue clays, 
Middle LOSSUS) clones 
Sette | (“Zone of Pe 
(Urgonien, Blue clay with fos! Yellow Ironshot Sandst 
D’ Orb.; Barré- (<< Ancylocera of Losser. 
mien and Urgo- Clays with septari 
nien, Cog.) | 
K 
(| Blue clays ....; 1inous 
N Lower || (‘Zone of Am. + spee- Saar = 
ine paversc ns (Blue claysume 
|D ‘Orb; Valangi- < (“Zone of Ax a 
nien and Néoco- | | Blue pyritic clays 
mien, Desor.) Md G Zone of An 
Tithonian, 
Oppel. 
Jurassic. Portlandian Clays ie 
