ROCK TEMPERATURES AT SYDNEY HARBOUR COLLIERY. 



215 



Strata. 



Thickness 



Depth from 

 Surface. 



Dark purplish-green mottled shale (glauco- 



, 



„ 



, 



a 



nitic) ... 



1 







1,200 



8 



Mottled shale, chocolate and grey... 



2 



7 



1,203 



3 



Light grey sandy shale, glauconitic streaks 







9 



1,204 







Dark blue shale 



1 



1 



1,205 



1 



Hard light grey shale 



4 



9 



1,209 



10 



Alternate streaks of light and dark shale... 







3 



1,210 



3 



Hard light grey shale with Equisetum 







9 



1,210 



10 



Alternate streaks of light and dark shale... 







5 



1,211 



3 



Hard light grey shale 



1 



1 



1,212 



4 



Alternate streaks, hard light and dark shale 







8 



1,213 







Yery hard dark blue shale... 



4 



9 



1,217 



9 



Very hard grey sandstone with dark streaks 



1 



2 



1,218 



11 



Yery hard dark micaceous sandstone 







10 



1,219 



9 



Yery hard grey sandstone with dark micace- 











ous streaks 



4 



3 



1,224 







Light grey micaceous shaly sandstone with 











streaks of dark shale (1,230' bright 











bitumen coal pipe) 



9 



11 



1,233 



11 



Hard dark blue shale (1,234' Thinnfeldia 











n - S P-) 



4 







1,237 



11 



Hard grey shaly sandstone with bands of 











darker sandstone and blue shale 



20 



10 



1,258 



9 



Dark blue shale with bands of shaly sand- 











stone ... 



7 



6 



1,266 



3 



Alternate bands, 1J" — 2^" thick, of grey 











shaly sandstone and dark blue shale... 



1 



4 



1,267 



7 



Grey shaly sandstone 



1 



4 



1,268 



11 



Dark blue shale 







10 



1,269 



9 



Shaly sandstone with streaks of darker 











micaceous sandstone ... 







6 



1,270 



3 



Grey shaly sandstone 



1 



o* 



1,271 



H 



Alternate bands of grey shaly sandstone 











and dark blue shale, averaging 2 J" thick 



1 



2 



1,272 



H 



Grey shaly sandstone 



1 



2 



1,273 



n 



Dark blue shale with streaks of shale, with 











Thinnfeldia odontopteroidesy Morris . . . 



6 



101 



1,280 



6 



Yery hard grey shaly sandstone with streaks 











of darker sandstone ... 







n 



1,281 



n 



Alternate bands of dark shale and hard 











grey sandstone 



2 







1,283 



H 



Blue sandy shale, fissile, micaceous with 











Thinnfeldia odontopteroides ... 



8 



*h 



1,291 



4 



Mottled chocolate shale — dark chocolate 











and bluish-green 



1 



5 



1,292 



9 



