Fig. 2. Section of the Punfield Formation, N. side of Swanage Bay.
Scale 1 in. to 20 ft.
'Lower Greensand" (Upper Neocomian).
Grey cypridiferous shales, with bands of limestone, ( Cyrena, Oysters, &c), "beef."
Cream-coloured and yellow sand 8 passing into thick-, irregularly bedded ironstones.
Ash-coloured and yellow sands, with seams and bands of ironstone (Oyster-beds).
Grey and ash-coloured sandy clay, with bands of ironstone. Bright yellow sands passing into ironstone.
Whitish and carbonaceous clays.
Ash-coloured and yellow sands, with thin irregular wavy seams of light and dark blue clay, and bands and patches of imperfect brown ironstone.
Marine band.
Variegated beds of the Wealden.
Fig. 3. Section of the Punfield Formation in the Isle of Wight. Scale 1 in. to 20 ft.
' Perna-beds " (Upper Neocomian).
Green clays.
Dark grey finely-laminated shales in places abounding with Cypris.
Bands of limestone with " beef" and " cinder," Cyrena and Ostrea abundant.
Dark grey shales with a few bands of sandstone, Cypris and Paludina.
Limestones with Ostrea, Modiola, Cardium, and other marine shells.
Dark-coloured shales and marls, cypridiferous in places.
"Bone-band," shales, and thin bands of limestone (Cyrena).
Grey paper-shales with sandy and limestone bands.
Some bands of lignite and nodules of pyrites.
Beds of yellow sand, very irregular and inconstant.
Dark grey and black shales, with bands of shell limestone.
Oyster-beds, sandy and septariiform layers.
Irregular and inconstant beds of yellow sand.
Dark grey shales, with bands of limestone, &c.
Bed of hard ferruginous sandstone with pyrites, Ostrea, Cyrena, &c.
False-bedded yellow sands and sand-rock, very ferruginous in places.
Alternations of finely laminated clay and sand, with some seams and patches of lignite.
Variegated beds of the Wealden.
