CATALOG UK OF THE LOCAL FOSSILS. 227 



VIII. — Catalogue of the Local Fossils in the Museum of the 

 Natural History Society, By Richaed Howse. 



The rock formations or Strata of Northumberland and Durham 

 are included under the following heads : — 



RECENT AND TERTIARY PERIOD. 



Recent and Histoeic. 



Deposits of Estuarine Silts, Sand-Dunes, Calcareous Tufa. Kitchen 

 middens of Roman and other camps and the more recent Cave 

 Remains. 



Pilehistoeic. 



Accumulations of Peat in old lake beds and marshes. Peat de- 

 posited under brick-clay and the older Estuarine Silts, old forest 

 beds at mouth of estuaries, or on the coast. 



Latest Glacial. 



The later gravels, sands, clays, and the newer, reconstructed drifts. 

 Shap-granite boulders in bed of the Tees and some of its tributaries 

 (Lune, etc.), and in the Gaimless, a tributary of the Wear, in newer 

 drift clay. Newer raised beaches. 



Scandinavian Delft. 



Stiff blue clay with angular chalk-flints, rounded quartz -pebbles, 

 and fragments of different porphyritic rocks. Cyprina Islandica, 

 Tellina proximo, in gravel under thick bed of clay at the Trou Rocks, 

 near South Shields. Older raised beaches. 



Oldest Glacial Moeaine = Botjldeb Clay. 



The old Moraine Boulder Clay filling up all the deep old prasglacial 

 valleys, and best seen on the coast line. 



