Stratigraphy, Composition, and Environment of Deposition of the Whangai Formation and Associated Late Cretaceous-Paleocene Rocks, Eastern North Island, New Zealand ; Appendix 1: Details of Petrological Samples ; Appendix 2: Chemical Analyses of Samples from the Onnagawa Formation (Micocene), Northwest Honshu, Japan ; Appendix 3: Maturation and Petroleum Source Rock Potential of the Whangai and Waipawa Formations