I wish to thank many people for their time and help. I am indebted to J. Jaworski for collecting a large number of samples from Christmas Island. Thanks also to C. Cook of PT Corelabs Indonesia and B. Meyrick of PT Geoservices who both helped with making multiple large format thin sections and slabbing the remaining rock. J. Hamilton of CSIRO provided the K-Ar dating. T. Allan of CSIRO carried out Sr dating of the limestones and comparative material from Java. C. Scotese provided a digital version of the base map in Figure 6 and  Figure 4.

Many people helped with the checking of old oil company observations, with the proper regard for the proprietary nature of the observations. Thanks to D. Kosasih and P. Sanyoto of the GRDC in Bandung, for generous access to their collection of field samples from Papua and the use of their microscope facilities. Thanks also to B.W. Seubert for the translation of several type descriptions from the German.