xvi SYNOPSIS OF CONTENTS. Chapter XLV.—Lower Cretaceous Strata : the W ealden FORMLATION. PAGE Types of Neocomian strata— Estuarine . . . .517 Marine . . . .517 Wealden groups . . . .518 Fresh-water origin of the Weald . 519 Range 519 Lower or Hastings Series . . 521 Summary of Wealden life General Tables of the Organic Rem eluding the Punfield Series . PACE Upper or Weald clay . . . 522 Paludina limestone . . . 523 Punfield formation . . . 523 In the Isle of Wight . . . 525 Foreign Equivalents of the Pun field formation.... 526 . . . . 527 .ins of the Wealden Strata, m- 527-528 Chapter XLVI,—Neocomian Strata. Unconformity between the Creta ceous and the Neocomian rocks Speeton clay, Yorkshire The three zones of the Lower Neocomian .... Characteristic fossils . Tealby series, Lincolnshire . Atherfield clay . . . . 529 529 531 531 532 533 Hythe beds (Kentish rag) . Sandgate beds .... Folkestone beds .... Correlation with Neocomian beds of Northern Europe . Comparative table Correlation of Cretaceous rocks of the S.E. andW. of England . 536 536 537 53S 541 542 Chapter XLVII.—The Gault. Physical characters Geographical range Conditions of deposition Gault of Southern England . The eleven zones of the Folke stone Gault . . . - Eastbourne .... Isle of Wight and Dorset 542 543 543 543 544 546 547 ! Gault of Mid-England Oxfordshire ..... Cambridgeshire—the phosphatic bed Gault fauna .... Correlation with the Gault of France . . . . . Gault of Switzerland . 548 548 548 549 550 551 Chapter XLVIII.—Upper Greensand and Chalk. " Cenomanian,” or Upper Greensand 552 Blackdown beds . . . • 553 Warminster beds. . . *553 Chalk of Cambridgeshire . . 553 The ten zones of the English Chalk 5 54 Chalk of the south of England . 559 The Folkestone beds . . -559 Zones of the Chalk Marl, Grey Chalk, and Lower Chalk, Folke stone . . . . .561 Chalk of the London basin . . 562 Surrey ..... 562 Kent 563 Relative thicknesses of the Chalk 565 Chalk of Yorkshire . . *565 Physical aspect .... 566 Fauna ...... 567 Chalk of Scotland . . . 568 Chapter XLIX.—Cretaceous Rocks of Ireland and the Continent. Cretaceous strata of Ireland . 569 Hibernian Greensand . . -570 Upper Chalk . . . *570 Correlation with France and Eng land 572 Cretaceous rocks of France and Belgium ..... 574 Summary of Cretaceous life General Tables of the Organic REMA Systems of MM. Hebert, Co- quand, and Renevier . 575-578 Cretaceous rocks of Germany and Northern Europe . . • 579 Of India and America . . . 580 581 Ns of the Cretaceous Strata 582-597