180 NOTES ON THE LIAS IN THE NEIGHBOUKHOOD OF EADSTOCE!. 



We have considered the clay (f ) as L. Lias, but the specimens 

 of A. raricostaius found therein were phosphatised and may 

 possibly haye been' worked up again; still this clay seems so 

 intimately united to the bed below which we know to be L. Lias, 

 that it seems more convenient to class it as such. The bottom 

 bed of the M Lias being absent, there may have been a slight 

 denuding action between the deposition of some of these beds ; 

 the clays seem rather washed into one another, but this may be 

 only surface action. — The bed (g) contains A. plam'costatus 

 abundantly, it has also a small shai-p-backed shell which may be 

 the fry of A. oxynotus ; in other sections it contains A. oUusus. 

 This latter Ammonite we find here in the Limestone (g*). "We have 

 one fine specimen 7 inches across, so that there are proofs here of 

 the Obtusus zone. The clay (h) is the Spiriferina horizon. 

 Fossils are very numerous, and consist chiefly as casts in 

 phosphatic material. The amount of phosphate of lime in this 

 bed must be very considcDable, and if it existed uniformly at a 

 slight depth might be important economically. . 



I am greatly indebted to the Hon. Treasurer, Mr. "W. "W". 

 Stoddart, F.C.S., City Analyst, for the following analysis of a 

 concretion from this bed : — 



Calcic carbonate - - - - 23.11 



,, sulphate _ - - _ 1.49 



,, phosphate - - - - 47.12 



Iron-peroxide - - - - - 0.88 



Alumina 12 16 



Silica 7.10 



Moisture 8.14 



Bituminous matter - - - trace 



100.0 



The lower beds of the Lias (Planorbis zone) are absent. The 

 ^'Sun-bed" follows immediately below the clay (h), which is 

 the sole representative, even of the Eucklandi zone. About 



