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1 FIGURE LIST 2 TABLE LIST 3 INTRODUCTION 5 1.1 A REVIEW OF TAPHONOMY AND THE FOSSIL RECORD 7 1.1.1 FISH TAPHONOMY 8 1.1.2 MEDIATORS OF FOSSILIZATION 11 1.2 PALEOENVIRONMENTAL GEOCHEMICAL PROXIES 12 1.2.1 PALEOREDOX 13 1.2.2 FE-C-S PROXIES 13 1.2.3 δS – SULFUR STABLE ISOTOPE PROXY 16 1.2.4 TRACE METAL PROXIES 18 1.3 RESEARCH GOALS 19 2 AREA OF STUDY 20 2.1 GEOLOGIC HISTORY OF THE HARTFORD BASIN 20 2.2 CYCLOAND TECHNOSTRATIGRAPHY OF THE HARTFORD BASIN 24 2.3 PALEONTOLOGY OF THE HARTFORD BASIN 25 2.4 THE EAST BERLIN FORMATION 31 2.4.1 GEOCHEMISTRY OF THE EAST BERLIN FORMATION 32 2.4.2 THE WESTFIELD BED 34 3 METHODS 39 3.1 FIELD SAMPLING: 39 3.2 TAPHONOMY 40 3.3 LABORATORY METHODOLOGY: 41 3.3.1 MINERALOGY: 41 3.3.2 GEOCHEMISTRY 43 4 RESULTS 50 4.1 TAPHONOMY: 50 4.2 MINERALOGY: 53 4.2.1 XRD: 53 4.2.2 MICROSCOPY: 55 4.3 ROCK EVAL AND RO ANALYSIS 59 4.4 GEOCHEMISTRY: 61 5 DISCUSSION 69 5.1 TAPHONOMY OF THE WESTFIELD BED 69 5.1.1 TAPHONOMIC PALEOENVIRONMENTAL INDICATORS: 69 5.1.2 VARIABILITY OF PRESERVATIONAL QUALITY: 71 5.2 MINERALOGY OF WESTFIELD BED FOSSILS 73 5.2.1 MINERAL IDENTIFICATION 73

The Taphonomy and Depositional Environment of Jurassic Lacustrine Fish Deposits, Westfield Bed, Hartford Basin