At this place, however, the clays are associated with beds of limestone and coarse sand, passing into oolitic and conglomerate ironstones. These beds have yielded the following fossils.
Pycnodus Hartlebeni, Rom.
Meyeria ornata, Phil. sp.
Serpula angulosa, Rom.
Belemnites lateralis, Phil.
Ammonites bidichotomus, Leym.
Nautilus, sp.
Turbo clathratus, Rom.
Exogyra sinuata, Sow.
Pinna gracilis, Phil. (P. rugosa, Rom.).
Avicula Cornueliana, D' Orb. (A. macroptera, Rom.).
Modiola rugosa, Rom.
Thetis Sowerbyi, Rom.
Thracia Phillipsi, Rom.
Panopaea Romeri, Gein.
Pholadomya alternans, Rom.
Rhynchonella.
Very similar to those of the Osterwald are the beds exposed at several points in the valley of the Inner, especially at Steinlahde, near Salzgitter, where the ironstone has for a long time past been extracted by means of a great open working. The section seen here is as follows, the beds dipping E. 63°.
( 1 ) Flammenmergel ( Gault) , with the usual characters, light-coloured and variegated clays, curiously striped (fancifully supposed to resemble flames, hence the name) 20 feet seen.
(2) Variegated purplish-red, yellow, and bluish clays, with several irregular layers (each about 6 inches thick) of argillaceous limestone. Through these beds fragments and oolitic remains of ironstone are disseminated, but sparingly 40 feet.
(3) Ironstone conglomerate, made up of irregular nodules of various sizes and of perfectly round and beautifully polished oolitic grains of brown ironstone. The bed is crowded with fossils, the gigantic Pecten ductus being especially abundant 15 feet.
(4) Light-brown calcareous sandstone (resembling that of Lincolnshire), containing enormous numbers of Pecten ductus, Exogyra sinuata, and other fossils Thickness 10 to 25 feet.
(5) Variegated clays similar to 2.
The beds in this neighbourhood are evidently very variable in character. A shaft sunk near the mine exhibits very pyritous blue clays, with many bands of argillaceous limestone, covered by beds of white sand and sandy limestone. The oolitic ironstones, with precisely similar characters to those of Steinlahde, are also dug at some other points in the neighbourhood of Salzgitter, as at Osterholz. These ironstones yield the following fossils, which enable us to refer the beds with certainty to the horizon of the Middle Neocomian. We have already pointed out the striking similarity, both in mineral character and fossil contents, of these beds to those of our Tealby series.
Belemnites jaculum, Phil.
— lateralis, Phil.
Ammonites bidichotomus, Leym.
— noricus, Schloth.
Ancyloceras (Crioceras) Emmerici, Lev.
Nautilus radiatus, Sow.
Exogyra sinuata, Sow.
Pecten cinctus, Sow.
Panopaea neocomiensis, Desh., sp.
Terebratula hippopus, Rom.
— sella, Sow.
It is interesting to notice that the Flammenmergel (the representative of the Gault) appears, at Steinlahde and at some other points,
