2-48 MR. C. T. TRECHMANN ON THE LITHOLOGT [June 1914, 



It is preserved exactly as in a normal limestone, and has a fissile 

 laminated structure. 



LXIX. About 5 feet above No. LXVII. Thinly-bedded, brown, 

 rather compact dolomite, with traces of plant-remains. Occasional 

 badly-preserved casts of fossils occur, and evidences of internal 

 movement are apparent. 



Raisby Hill, near Coxhoe. — LXX. Near the base of the 

 Lower Limestone. A rather nodular, irregular, grey and brown 

 bed. Hackly surfaces and other traces of internal solution and 

 disturbance are seen. Fossils occur sparingly, preserved as 

 No. LXVIII, also plant-remains. 



Sherburn Hill.— LXXI. About 10 feet above the Marl Slate. 

 A well-bedded yellow, rather porous, hard rock enclosing a few hollow 

 casts of ostracods and bivalves, with obscure plant-remains. 



LXVII. 



Insol. residue . . 0'63 



Fe 2 3 , etc 2-66 



CaC0 3 95-94 



MgC0 3 1-49 



S0 3 0-08 



Totals 100-80 



Calcite 94-17 



Dolomite 3-26 



Pierceb ridge. Riverside section. — LXXII. Brown, rather 

 friable, well-bedded rock, retaining traces of empty stellate cavities. 

 No fossils. 



HighConiscliffe-on-Tees. — LXXIII. Soft, yellowish-brown, 

 friable, small-grained oolite. No fossils. 



Midderidge Quarry. A few feet above the Marl Slate. — 

 LXXIV. Well-bedded, dark, compact rock. It is traversed by thin 

 calcite-veins, and shows some internal distortion. Twigs and fruit 

 of Ullmannia are plentiful. 



LXXII. LXXIII. LXXIV. 



Insoluble residue 0" 69 



Fe 2 3 , etc 0-48 



CaC0 3 54-69 



MgC0 3 45-15 



Totals 101-01 



Calcite 0*93 



Dolomite 98*91 



Marl Slates. 



Blackhall Colliery Sinking. — LXXV. A dark flaggy rock, 

 passing upwards into the Lower Limestone. 



LXVIII. 



LXIX. 



LXX. 



LXXI. 



nil 



4-15 



1-68 



2-00 



0-30 



1-93 



0-37 



1-23 



98-35 



53-32 



97-01 



55-22 



1-15 



40-43 



1-46 



42-01 



tr. 



0-15 



tr. 



tr. 



99-80 



99-98 

 5-19 



100-52 

 95-27 



100-46 



97-02 



5-19 



2-48 



88-56 



3-20 



92-04 



0-23 



0-31 



60-30 



39-40 



3-48 



0-63 



54-33 



41-50 



100-24 



13-39 

 86-31 



99-94 



4-91 

 90-92 



