Heterogeneous stress involves a variation of states of stress between different points in a body. This session examines the different ways the stress state at a single point is specified. To this end the concepts of the stress ellipsoid and stress tensor are introduced. The consideration of spatial variation in the state of stress involves the idea of stress fields. There are alternative ways of representing stress fields. One approach is to map out the principal stress directions across the body to produce stress trajectories. The distribution of structures through a body is often intimately related to stress trajectory patterns. For this reason the emphasis in this session is placed on the interpretation of such patterns. <...>

The evolution of the global oceanic and atmospheric circulation systems has been affected by several forcing processes, with orbital variations being dominant on shorter geological time scales. Over longer periods of time (>10 Ma) the tectonic evolution of the solid Earth has been recognized as the major control on the development of the global climate system. Tectonic activity acts in one of two different ways to influence regional and global climate. The earliest solid Earthclimatic interaction recognized was the effect that the opening and closure of oceanic gateways had on the circulation patterns in the global ocean. Major effects on regional and sometimes global climate have been attributed to such changes, e.g. closure of the Isthmus of Panama (Driscoll & Haug 1998). Since the late 1980s a second form of climate-tectonic interaction has been recognized, involving the growth and erosion of orogenic belts. In this second category the Arabian Sea region must be considered the global type example. <...>

THE NORTHERN PHILIPPINES AND ADJACENT SEAS

Seismotectonics of the Northern Philippine Island Arc Michael W. Hamburger, Richard K. Cardwell, and Bryan Isacks 1

Origin and History of the South China Basin Brian Taylor and Dennis E. Hayes 

The Tectonics of Northward Propagating Subduction Along Eastern Luzon, Philippine Islands Stephen D. Lewis and Dennis E. Hayes 

Paleomagnetism of Luzon M. Fuller, R. McCabe, I. S. Williams, J. Almasco, R. Y. Encina, A. S. Zanoria, and J. A. Wolfe

Extensional tectonics in the Jeanne d'Arc Basin, offshore Newfoundland: Implications for the timing of break-up between Grand Banks and Iberia

Sequence stratigraphic response to Aptian-Albian rifting in conjugate margin basins: a comparison of the Jeanne d'Arc Basin, offshore Newfoundland, and the Porcupine Basin, offshore Ireland

Early Tertiary evolution and sequence stratigraphy of the Faeroe-Shetland Basin: implications for hydrocarbon prospectivity