Page:A Treatise on Geology, volume 1.djvu/72

 56 {| style="font-size:85%;line-height:140%;border-style:none;text-align:left;" cellspacing="0" cellpadding="3" in yards. |}
 * colspan='5' style="text-align:center;" | Primary or Palœozoic Strata.
 * colspan='5' style="border-bottom:thin solid;text-align:center;" | Magnesian or Permian System.
 * style='border-right:thin solid;border-bottom:thin solid;text-align:center;' | Names of formations.
 * colspan='2' style='border-right:thin solid;border-bottom:thin solid;text-align:center;' | Thickness
 * style='border-right:thin solid;border-bottom:thin solid;text-align:center;' | Names of formations.
 * colspan='2' style='border-right:thin solid;border-bottom:thin solid;text-align:center;' | Thickness
 * colspan='2' style='border-right:thin solid;border-bottom:thin solid;text-align:center;' | Thickness
 * style='border-right:thin solid;border-bottom:thin solid;text-align:center;' | Subdivisions or groups.
 * style='border-bottom:thin solid;text-align:center;' | Nature of the deposits.
 * style='border-right:thin solid;' rowspan="5" | Magnesian limestone (North of England).
 * rowspan="5" | 100
 * style='border-right:thin solid;' rowspan="5" | $$\left\{ \begin{matrix}\ \\ \ \\ \ \\ \ \\ \ \\ \ \\ \ \end{matrix} \right.$$
 * style='border-right:thin solid;' | Knottingley limestone.
 * Grey laminated limestone.
 * style='border-right:thin solid;' | Gypseous marls.
 * Red and white clays, &c.
 * style='border-right:thin solid;' | Magnesian limestone.
 * Yellow, granular, &c. limestone.
 * style='border-right:thin solid;' | Marl slate.
 * Laminated calcareous beds, with fishes.
 * style='border-right:thin solid;' | Rothetodteliegende.
 * Red sandstones and clays.
 * colspan='5' style="text-align:center;" | Carboniferous System.
 * style='border-right:thin solid;' rowspan="2" | Coal.
 * rowspan="2" | 1000
 * style='border-right:thin solid;' rowspan="2" | $$\left\{ \begin{matrix}\ \\ \ \\ \ \\ \ \\ \ \end{matrix} \right.$$
 * style='border-right:thin solid;' | The subdivisions are only locally ascertained.
 * Strata of sandstone, shale, ironstone, with rare deposits of freshwater limestone.
 * style='border-right:thin solid;' | Millstone grit
 * Sandstones, often coarse grained, or pebbly; shales, iron stones, thin limestones.
 * style='border-right:thin solid;' rowspan="3" | Carboniferous limestones (N. of England).
 * rowspan="3" | 900
 * style='border-right:thin solid;' rowspan="3" | $$\left\{ \begin{matrix}\ \\ \ \\ \ \end{matrix} \right.$$
 * style='border-right:thin solid;' | Yoredale rocks.
 * Limestones, sandstones, shales, coals.
 * style='border-right:thin solid;' | Sear limestones.
 * Limestones.
 * style='border-right:thin solid;' | Alternating sandstone, and limestones.
 * Limestones, sandstones, &c., often red.
 * colspan='5' style="text-align:center;" | Old Red or Devonian System. 
 * style='border-right:thin solid;' rowspan="3" | Old red sandstone (Herefordshire.)
 * rowspan="3" | 100 to 3300
 * style='border-right:thin solid;' rowspan="3" | $$\left\{ \begin{matrix}\ \\ \ \\ \ \\ \ \\ \ \end{matrix} \right.$$
 * style='border-right:thin solid;' | Conglomerate group
 * Conglomerates and sandstones.
 * style='border-right:thin solid;' | Cornstone group.
 * Coloured clays and concretionary limestones.
 * style='border-right:thin solid;' | Tilestone group.
 * Flagstones and clays. The lower beds pass to the group below.
 * Limestones, sandstones, &c., often red.
 * colspan='5' style="text-align:center;" | Old Red or Devonian System. 
 * style='border-right:thin solid;' rowspan="3" | Old red sandstone (Herefordshire.)
 * rowspan="3" | 100 to 3300
 * style='border-right:thin solid;' rowspan="3" | $$\left\{ \begin{matrix}\ \\ \ \\ \ \\ \ \\ \ \end{matrix} \right.$$
 * style='border-right:thin solid;' | Conglomerate group
 * Conglomerates and sandstones.
 * style='border-right:thin solid;' | Cornstone group.
 * Coloured clays and concretionary limestones.
 * style='border-right:thin solid;' | Tilestone group.
 * Flagstones and clays. The lower beds pass to the group below.
 * Coloured clays and concretionary limestones.
 * style='border-right:thin solid;' | Tilestone group.
 * Flagstones and clays. The lower beds pass to the group below.
 * Flagstones and clays. The lower beds pass to the group below.