28 



TYPE AMMONITES— IV 



Dec. 



1922 



Correlation Table II 



Sequence II — Oxfordshire 



Wheatley 



Shotover Hill 



Bed 15 ? 



16 — 19, 

 20, 21 , 

 22 — 24 , 



-J 



27—31 



27 



31 



(Sandpit and Brickyard, near 

 Littleworth) 



I. Littleworth Sands : 



a. Whitish sands, with small 



doggers, Cardium dis- 

 simile 



b. Yellowish sands, without 



doggers 



c. Brownish sands 



[2, 3, 4. Hidden in hill (about 

 15 feet unexposed) between 

 Sandpit and top of Brick- 

 yard (?) ] 



5, b. Littleworth L^ditc Clay, 

 Strong Clay, Amm., 

 coarsely biplicate and fine- 

 ribbed forms 



ya. Sand, lydites and whitish 

 concretions. Paravirgatitcs ? 



jc. 



Below 34 ? 8. 

 (Crendon Clay) 



(Epitomised from H. B. Wood- 

 ward, Geol. Oxf. ; Mem. G. Surv., 

 1908, 51) 



I. Sands with hard, ferruguinous 

 bands 



2. Whitish Limestones 



3. Clays, loam and greenish sands 



4. Rubbly glauconitic limestone 



5. Lydites 



with 



W'heatley Sands, large 

 doggers, easily broken up. 

 Wheatleyites (Amm. of 

 Per. eastlecottensis type) 

 Mild Clay 



(top of clay workings) 

 The Lamellibranch fauna of the Wheatley 

 resemblance to that of the Hartwell Clay. 



6. Blue and brown clay, 

 lydites and phosphates 



7. Sands and ' sand-ballers.' 

 More detailed by S. S. B. : 



ya. Shotov^er Grit Sands, with 

 huge, very hard doggers( quartz 

 grains, lydite and glauconite) : 

 Paravirgatites, Am. cf. devillei, 

 Am. pectinatus 

 yb. Shotover Fine Sands 

 yc. Sand-rock like the Wheatley 

 Sands 



8. Mild Clay 



(top of clay workings) 

 Sands seems to have considerable 



Sequence III — Swindon, Wiltshire 



(Based on information kindly supplied by C. P. Chatwin, F.G.S., and 

 J. Pringle, F.G.S., whose section is in the press, to be published in " Summary 

 of Progress for 1921." Identification marks on specimens in the Hudleston collection 

 are given in inverted commas. Square brackets enclose notes by S. S. B.) 



Bucks-Oxon Correlation 



Swindon Strata 

 -3. White Beds] 

 Hard, white, chalky limestone. Lucina, 



Cerithium, etc. 

 Seam of grey marl 

 White weathering, compact limestone, with 



small grains of quartz 

 [Shelly Bed] Dark-grey clayey sand, with 

 shelly layers 



