In the Mount Victor area of the Eastern Highlands Province, re- connaissance geological mapping and new micropalaeontological
data have revealed the existence of at least three small thrust- bound windows exposing late Middle to Late Cretaceous (Late
Aptian-Early Albian and Late Santonian-Maastrichtian) sedimen- tary rocks and pillow lavas, Latest Paleocene- Earliest Eocene
pillow lavas, and Latest Paleocene-Earliest Eocene bathyal
micrites. Late Middle Eocene to Late Eocene inner neritic
bioclastic micrite units also occurs in thrust contact with Middle
Miocene Yaveufa Formation volcanolithic conglomerates. The
Cretaceous and Early Tertiary units appear to be thrust-bound
and are best exposed in a window just south of Mount Victor, and
in two smaller windows to the east. The inner neritic Eocene
limestone occurs in a thrust-bound sliver within the Yaveufa For- mation near Obura. The windows occur within extensive out- crop of Early Miocene Omaura Formation and the Yaveufa For- mation. Thin-bedded grey mudstone, siltstone and sandstone,
typical of much of the Chim Formation form only a small part of
the exposure of Cretaceous rocks. Thick-bedded volcanolithic
conglomerate, spilitic pillow basalts, and welded basic tuffs domi- nate the Cretaceous section. The stratigraphy and structure of the Mount Victor area is similar
to the Menyamya area, the Aure Scarp, and perhaps the Tapini
area. This study has raised the possibility of widespread thrust- ing in the Kainantu area, and suggests that the boundary between
the Omaura and Yaveufa Formations is thrusted, at least locally.