Subaerial volcanic rocks of the Willaumez?Manus rise, Papua New Guinea: a key to the origin of the rise?
R.W. Johnson and R.J. Arculus
Bulletin of the Australian Society of Exploration Geophysicists
9(3) 98 - 99
Published: 1978
Abstract
An asymmetrical rise, 450 km long, on the Bismarck Sea floor extends between Manus Island and Willaumez Peninsula on the north central coast of New Britain (Figure 1). Northeast of the steeper flank of the rise is the Manus Basin, 2500 m deep, which is deeper and apparently younger than the New Guinea Basin southwest of the rise. The Willaumez?Manus Rise is coincident with a Bouguer gravity trough; Willcox (1977) calculated its crust to be 21?25 km thick, in contrast to values of mainly 19?21 km for the two adjacent basins.https://doi.org/10.1071/EG978098
© ASEG 1978
