Notes from Stanley's map Feb 3 '6 2/4. 2. Note that the only Eocene rocks in N.G. lie just east of the Fly River by the Elelenla River and Macrosson Island. somewhere west of 3. Stretching from the headwaters of Fly + Strickland to Kikori a huge series of lime sediments indicate the former presence of a large geosyncline which existed (?) from Turassic (beds at Obrewotini bend on Strickland) time until Pliocene time (beds at upper Fly + Strickland and small series just west of Kikori). Geosyncline probably extended throughout Purari-Kerema region (rocks Plio-Miocene). The large mass of extrusives centering on Mt. Harene- are probably recent and may have provided the bediments covering the Plio-Miocene beds between Kikori and the Purari delta. At the end of Pliocene the geosyncline may have been filled up and the uplift movement northwest of Kikori have been initiated. The connection of the geosyncline with the ocean may have been at either end - in Dutch N.G. or though the Kikori area. At that time the lower Fly plain may well have been continuous with Australia.