Contents

PREFACE VII

PROLOGUE: THE GREATEST MYSTERY IX

PART I: BOLT FROM THE BLUE

CHAPTER 1 : THE ALVAREZ DISCOVERY 3

CHAPTER 2: THE PAST AS KEY TO THE PRESENT 23

CHAPTER 3: STONES FROM THE SKY 35

PART II: WAS THERE A K-T IMPACT?

CHAPTER 4: THEORY ON TRIAL 55

CHAPTER 5: COUNTERATTACK 67

CHAPTER 6: THE VOLCANIC RIVAL 85

CHAPTER 7: TO CATCH A CRATER 97

PART III: DID AN IMPACT CAUSE THE K-T MASS EXTINCTION?

CHAPTER 8: CLUES FROM THE FOSSIL RECORD 125

CHAPTER 9: A WHIMPER OR A BANG? 143

CHAPTER 10: THE DEATH OF THE DINOSAURS 159

PART IV: THE TRANSFORMATION OF GEOLOGY

CHAPTER 11: ARE ALL MASS EXTINCTIONS CAUSED

BY COLLISION? 183 CHAPTER 12: ARE EXTINCTION AND CRATERING PERIODIC? 199

CHAPTER 13: GEOLOGY'S GOLDEN AGE 211

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