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We propose a model for the exhumation of Late Miocene coesiteeclogite in the Woodlark Rift of Papua New Guinea. Reorganization within the obliquely convergent Australian-Pacific plate boundary zone led to formation of the Woodlark microplate. Counterclockwise rotation of the microplate relative to the Australian plate resulted in extensional reactivation of a subduction thrust (subduction inversion) and the exhumation of high- and ultrahigh-pressure (HP-UHP) rocks within the Australian-Woodlark plate boundary zone. The model invokes plate tectonic processes to drive rapid exhumation and predicts spatial and temporal patterns of exhumation to assess its applicability to HP-UHP terranes worldwide. [ABSTRACT FROM AUTHOR]

Examines subsistence affluence and market economy in Papua New Guinea. Identification of hybrid types of economic activities in the transition from subsistence to a market economy; Features of the traditional agriculture of the country; Formulation of a model abstracted from agriculture.