Volume 2

A student's text-book of zoology / by Adam Sedgwick.

  • Sedgwick, Adam, 1854-1913.
Date:
1898-1909
Catalogue details

Licence: In copyright

Credit: A student's text-book of zoology / by Adam Sedgwick. Source: Wellcome Collection.

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    TABLE OF GEOLOGICAL PERIODS AND FORMATIONS Cretaceous Jurassic Triassic SECONDARY OR MESOZOIC PERIOD. (Upper Chalk (with flints). Middle Chalk (with few flints). Lower Chalk. Upper Greensand. Gault. (Lower Greensand. Lower (Wealden. f cPurbeck and Portland Beds. Upper ] Kimmeridgo Clay (Solenhofen Slates in Bavaria.) vCorallian and Oxford Clay. JGreat Oolite. ^ Miaclle jjjjfgfjor Oolite (Stonesfield Slate belongs here). (Upper Lias. Lower j Middle Lias. '■Lower Lias. Tj f RhaeticBeds. PP®! \ Keuper Marls and Sandstone. Middle: Muschelkalk, absent in Britain. Lower; Bunter Sandstone, Pebble Beds, Karoo of S Africa. Permian . Carboniferous. Devonian Silurian PRIMARY OR PALAEOZOIC PERIOD. ( Upper : Magnesian^ Limestone. *■ Lower : Red Sandstones. ( rT ( Coal Measures. . j Upper iMiUstone Grit. V Lower Carboniferous Limestone and Shales. [ Upper Old Red Sandstone. ■ Limestones (marine). Lower Old Red Sandstone. I Upper Cambrian* Lower Cambrian r Ludlow. I Wenloek. May Hill Sandstone (Llandovery). f Bala. I Llandilo, Arenig. Tremadoc Series. Lingula Flags. Menevian Scrie.=. Harlech Series. OleneUus Beds. Precambrian . L. Silurian of Murchison, Ordovician of Lapworth.