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Keywords from Image Description:
The Quarterly journal of the Geological Society of London . PRESTWICH ON THE LOWER TERTIARY STRATA Panopsea intermedia Sow Fusus Pectunculus Plumsteadiensis Sow Ostrea Cardium sp Teeth of Lamnae Astarte We now enter upon tract of country which is so thickly and uniformly covered by beds of gravel and boulder clay drift