236 ME. C. T. TBECHMANN OX THE LITHOLOGT [June 1914* 



II. III. IV. V. VI. 



Insoluble residue ... 3-31 0'76 0-45 0-05 0-58 



Fe 2 3 , etc 1-18 0-45 0'30 0'40 0'44 



CaC0 3 52-96 54-85 55-41 54-79 54-49 



MgC0 3 42 * 13 45 ' 02 45 ' 01 45 ' 13 44 ' 84 



S0 3 0-15 0-08 tr. tr. tr. 



Totals 99-73 101-16 101-17 100-37 100-35 



Calcite 2-80 1-25 1-82 1*06 1-10 



Dolomite 92-29 98-62 98-60 98-86 98-23 



Upper Limestones with Chondrites. 



VII. Coast-section north of Blackhall Rocks. — A fine- 

 grained, whitish-yellow, soft, fetid, soapy rock, well-bedded but 

 much fractured. Full of hollow casts of Schizodus, Liebea, and 

 Chondrites. 



VIII. Coast-section south of Blackhall Rocks, associ- 

 ated with beds similar to the above. A fine-grained, white, soft, 

 fetid, soapy rock, well-bedded and full of stellate cavities. 



A stained section shows a compact aggregate of very minute 

 dolomite-grains, yellow with impurities. Calcite occurs throughout 

 the slide as minute specks which stain deeply. Irregular quartz- 

 grains and tourmaline-needles are visible. 



VII. VIII. 



Insoluble residue 2-61 3'80 



(rather oily). 



Fe 2 3 , etc 0-93 0'77 



CaC0 3 52-76 53-14 



MgCO, 42-67 42-28 



S0 3 ...' 0-31 0-17 



Totals 99-28 100-16 



Calcite 1-96 2-81 



Dolomite 93-47 92-61 



Concretionary Beds. 



Coast-section between Blackhall Bocks and Hart. — 

 The powdery matrix is here largely removed, leaving the con- 

 cretions in fallen masses. Associated with these are beds in which 

 concretions have not been developed (No. XI). 



IX. Spherical nodules separated from the powdery matrix. 



X. Hard, platy, fetid, concretionary limestones associated with 

 the above. Well-preserved fossils on the surfaces. 



XI. Soft, fetid, greasy, fine-grained, well-bedded, rather massive 

 brown rock. Many fossils as hollow casts. 



