Stone Caps on Shropshire Union Brickwork

[Heartland]

I noticed the following stone cap on brick work at Bank Lock, Montgomeryshire Canal. I presume this style of capping was Shropshire Union, as the brick work is of blue engineering type.

 

Having seen similar styles on the portal of Chirk Tunnel, I did wonder if these pyrimidal style stone carved caps were a standard feature on reconstruction and repair work undertaken during the period the Shropshire Union owned these waterways.