Table 1: Different "Soil"- "Underclays" in the Joggins Division 4 Coals:
Source: Logan, 1843-1845; republished in 1908.

  Coal
 Group
 Sandstones and
 Argillaceous
  Sandstones
 (Understones)
  Arenaceous
     Shales
 (Underclays)
    Argillo-
  arenaceous
      Shales
 (Underclays)
  Argillaceous
 (Gray) Shales
 (Underclays)
 Carbonaceous
  Shales below
 Coals or above
   Underclays
    1         1 (Understone)
 w/ Stigmaria ficoides
         1
 w/ Stigm. ficoides
         1
 w/ Stigmaria ficoides
 
    2          1
 w/ Stigm. ficoides
         1
 w/ Stigmaria ficoides
   1-3 (?) Inferred
   from Dawson, 1868
   No Stigmaria
    3          1
 w/ Stigmaria ficoides
    4          1
 w/ Stigmaria ficoides
          1
 No Stigmaria
           3
 No Stigmaria
    5          1
 w/ Stigmaria leaves
         4
 3 w/ Stigm. ficoides
 1 w/ Stigm. leaves
    6         1 (Underclay)
 w/ branches and leaves
 of  Stigmaria ficoides
         1
 w/ Stigmaria
    7           1
 w/ Stigmaria
          3
 No Stigmaria
    8         1 (Understone)
 w/ Stigmaria and
 upright Calamites
         1
 w/ Stigmaria
         1
 w/ Stigmaria
          3
 1 w/  No Stigmaria
 1 w/ Stigmaria
 1 w/ Stigm. ficoides
          1
 No Stigmaria
    9         1 (Underclay)
 (Rough  gray sandstone)
 w/ Stigmaria
         1
 w/ Stigmaria
         1
 w/ Stigm. ficoides
   10          1
 w/ Stigm. ficoides
                   1
 No Stigmaria
   11          1
 w/ Stigm. ficoides
          1
 No Stigmaria
   12        1 (Understone)
 w/ Stigmaria
         1
 w/ Stigm. ficoides
          1
 No Stigmaria
 Totals             5
 3 w/ Stigmaria
 1 w/ Stigmaria ficoides 
 1 w/ branches and leaves
 of  Stigmaria ficoides
         4
 1 w/ Stigmaria
 1 w/ Stigm. ficoides
 1 w/ Stigm. leaves
         12
 2 w/ Stigmaria
 9 w/ Stigm. ficoides
 1 w/ Stigm. leaves
         8
 2 w/ Stigmaria
 4 w/ Stigm. ficoides
 2 w/ No  Stigmaria
     11-13
 No Stigmaria in any
  of these beds