DURHAM 
accessible), with fish, and a basal pebble-bed with the horny brachiopod Lingula. 
Trechmann, C. T. 1045, p. 339. 
Geol. Surv. O.S. 103 S.W. ; Ord. New Pop. 85. 
Sunderland. Exposures at N. and S. ends of Tunstall Hill, an elongated 
knoll 2 miles S. of Sunderland. 
Permian, Magnesian Limestone, with brachiopods (Pro ductus, Camarophoria) 
and molluscs ( Bakevelha , Turbo ) less plentiful now than formerly. 
Trechmann, C. T. 1945, p. 344. 
Geol. Surv. O.S. 105 S.E. ; Ord. New Pop. 78. 
Sunderland. Humbleton Hill, 2 miles S.W. of Sunderland. A classic 
locality now in bad condition. 
Permian, Magnesian Limestone. Brachiopods in quarry and exposures 
up eastern flank of hill ; Nautilus in cuttings at top of hill, facing W. 
King, W. 1850. Trechmann, C. T. 1945, p. 341. 
Geol. Surv. O.S. 105 S.E. ; Ord. New Pop. 78. 
Sunderland, see also Castletown, Ford Estate. 
ESSEX 
Ballingdon, Sudbury. Large chalkpit f- mile S.W. of St. Peter’s Church, 
Sudbury, and about 100 yds. E. of Ballingdon Hall. 
Cretaceous, Upper Chalk ( U intacrinus zone) with plates of the crinoid 
Uintacrinus , belemnites ( Actinocamax verus ), etc. : capped by Tertiarv Beds 
and Pleistocene glacial deposits. 
Boswell, P. G. H. 1929, pp. 16-17. 
Geol. Surv. N.S. 206 ; Ord. New Pop. 148. 
Beaumont, 5£ miles W.N.W. of Walton-on-the-Naze. Section (now 
obscured) along edge of pond in farmyard near Beaumont Church. 
Pliocene, Red Crag ( ? Newbournian), with 90 species of molluscs. 
Reid, C. 1890, pp. 80, 85. 
Geol. Surv. O.S. 48 S.E. ; Ord. New Pop. 150. 
Great Chesterford, 3£ miles N.W. of Saffron Walden. Pit by roadside, 
\ mile E. of Great Chesterford Church. 
Cretaceous, Middle Chalk ( Terebratulina zone), with the sea-urchins 
Echinocorys scutata (an interesting shape-variation) and Micraster corbovis 
and other fossils. 
Brighton, A. G. 1928, p. 369. 
Geol. Surv. N.S. 205 ; Ord. New Pop. 148. 
Harwich. Cl iff- top. 
Pliocene, Red Crag (now entirely disappeared), resting on Eocene, London 
Clay. Section described by Dale in 1704. 
Reid, C. 1890, pp. 71, 85. 
Geol. Surv. O.S. 48 N.E. ; Ord. New Pop. 150. 
Walton-on-the-Naze. Coast and cliff-section, accessible along foreshore 
or from bus-route to the Naze. Marked by Tower on cliff about H miles N.E. 
of Walton station. 
Pliocene, Red Crag (Waltonian) and basal Nodule Bed (exposed after 
cliff-falls), resting on Eocene, London Clay. Ncptunca contraria and other 
gastropods very numerous, entire but waterworn. Lamellibranchs (including 
Glycymens glycymeris in prominent bands) common. Derived fossils, sharks’ 
teeth, worn bones, etc. in Nodule Bed. 
Reid, C. 1890. Harmer, F. W. 1913-1922. 
Geol. Surv. O.S. 48 S.E. ; Ord. New Pop. 150. 
