50 



Mr. N. J. Winch on the Geology of 



Section of the Strata at Grienfield Colliery, half a mile West of 

 Aukland. 



Soil 

 Clay 



Blue metal 

 Grey metal stone 

 Strong grey metal 

 Blue metal 



1 Coal 

 Sill 

 Grey metal stone and 



blue metal 

 Strong grey post 

 Blue metal 

 Black metal stone 



2 Coal 

 Sill 



Grey metal stone 

 Grey post 

 Grey metal 

 Brown post 



3 Coal 

 Sill 



4 Coal 

 Sill 



Grey metal 

 Metal stone 



5 Coal 

 Grey metal 



6 Coal 



Carried forward 21 12 2 



Brought forward 

 Sill 



Ftli 

 21 



Yd 



1 



. Ft. In. 

 2 2 

 2 — 



Grey metal stone 



1 



1 



1 



6 



Strong grey stone 



Blue metal and metal stone 



3 



— 



1 



9 

 6 



Dark blue metal 



1 



1 



9 



6 



Black metal stone 



— 



— 



1 



— 



7 Coal 



— 



— 



— 



9 



Band 



— 



— 



— 



9 



8 Crow-Coal 



— 



1 



1 



6 



Grey sill 

 White post 



1 



1 

 1 



2 



6 



9 Coal 



— 



— 



— 



9 



Grey metal with brown ) 

 scars . . . J 



— 



— 



1 



9 



Grey metal stone with post 



— 



1 



— 



— 



Strong white post . 

 Blue metal 



2 



1 



2 



6 



Strong grey metal 

 Blue metal 



— 



1 



2 

 2 



9 

 6 



Strong grey metal stone 



1 



— 



— 



— 



Blue metal 



— 



— 



1 



9 



White post 

 Blue metal 



3 

 1 



1 



2 



2 



G 

 9 



Black swad 



— 



1 



— 



6 



10 Main Coal 



— 



1 



2 



10 



Total 46 



Section of the Strata at Cockfield Colliery. 



Soil 



Brown stony clay 

 Grey post 



Brown and white post 

 Strong white post 

 White post 

 Grey metal stone 

 1 Coal 

 Grey sill 

 Grey metal stone 

 Black stone mixed with > 

 Coal . . .$ 



Carried forward 



Fth. Yds 



Ft. In. 



1 — 



2 — 



1 9 



3 1 



1 3 







2 9 



2 1 



— 6 

 2 9 



— 1 



— — 



2 — 



3 1 



2 — 







2 — - 



16 — 



1 — 



Fth. Yds. Ft. In, 

 Brought forward 16 — 1 — 



Grey metal stone . 1 9 



Whin . . . 10 



Grey post 

 Whin 



Grey metal stone with > 

 girdles . . . J 

 Dark blue metal 

 2 Coal 

 Grey sill 



1 2 8 



9 



Total 22 



