5' 4" Sill intruded into coal measures. Probably carboniferous in age of Rawley Regis and Ladywood occurences.
Locality details
On east bank of canal N.E. of County Bridge Farm Bentley Estate. Darlastan. No.1 BH. (Darlastan Borough Engineers Dept.) at Bentley Estate. Baked coalbelow sill at 76' 5".