Landscape evolution is driven by surface processes that are forced by the interaction of climate, tectonics and topography. In this session we will explore records of these interactions from mountain belts to basins. Presentations cover both well established and novel techniques that utilize geomorphic, erosional, and sedimentary records to quantify rates and styles of deformation, climatic changes, and topographic impacts on surface processes. Presentations are arranged around three themes: (1) Topographic stress control on surface processes: Tectonic and topographically generated stress fields affect the rate of local surface processes. Surface processes in turn modulate these stress fields and shape landscapes. Theoretical and numerical models as well as laboratory and field studies explore these controls and potential feedbacks. (2) Tectonic and climatic influence on eroding landscapes: The coupling between tectonic deformation and climate governs the rate of surface processes. Morphometric analyses, low-temperature thermochronology, and cosmogenic nuclides all provide useful insights into the rates at which surface processes occur and the feedbacks among tectonics and climate. (3) Morphometric and basin records of landscape evolution: Erosional products of surface processes modulated by climate, tectonics and topography are routed through rivers to depositional sinks, which themselves may be subsequently affected by tectonic deformation. This topic explores how sedimentary records and morphometric analyses can be used to reconstruct climatic and tectonic forcing of landscapes.

Understanding how successive earthquakes accrue on individual faults to produce kilometer-scale displacements, build landscapes and activate cascades of geomorphological processes is still poorly understood. While large-scale geodynamic processes like subduction and orogenesis can be considered continuous over geological timescales (100 ka to Ma), they mostly operate discretely over shorter timescales (< 100 ka). Apparent quiescence is transiently interrupted by pulses of localised tectonic and geomorphic activity, which repeatedly interact and shape the landscape. Long-term permanent crustal deformation forms landscapes, yet geodesy primarily records short-term elastic strain. In this context, the surface expression on individual faults or active margins contains valuable information on both the endogenous and the exogenous processes at work, the complexity of which may be studied in long-term features (e.g. landscape evolution, mountain building, basin formation) as well as short-term data (e.g. geodetic monitoring, paleoseismology).

The scope of this session is to bring together state-of-the-art research efforts to better understand how the short-term rate variability that is often recorded on the Earth’s surface integrates to produce uniform large-scale active tectonic processes (i.e. subduction, collision, rifting, transform faulting). We welcome contributions combining observations and analogue & numerical modelling. We would also particularly value studies that bridge deformational processes operating over different spatial and temporal scales.

The study of active faults and deformation of the Earth's surface has made, and continues to make, significant contributions to our understanding of earthquakes and the assessment of seismic related hazard.
Active faulting may form and deform the Earth's surface so that records are documented in young sediments and in the landscape. Field studies of recent earthquake ruptures help not only constraining earthquake source parameters but also the identification of previously unknown active structures. The insights gleaned from recent earthquakes can be applied to study past earthquakes. Paleoseismology and related disciplines such as paleogeodesy and paleotsunami investigations still are the primary tools to establish earthquake records that are long enough to determine recurrence intervals and long-term deformation rates for active faults. Multidisciplinary data sets accumulated over the years have brought unprecedented constraints on the size and timing of past earthquakes, and allow deciphering shorter-term variations in fault slip rates or seismic activity rates, as well as the interaction of single faults within fault systems. Based on the this rich, but very heterogeneous knowledge of seismogenic faults, a variety of approaches have been developed to tranfer earthquake-fault geology into fault models suitable for probabilistic SHA. This session thus aims at linking field geologists, crustal deformation modellers, fault modellers, and seismic hazard practitioners.

In this session, we welcome contributions describing and critically discussing different approaches to study active faults. We are particularly interested in studies applying new and innovative methodological or multidisciplinary approaches. We hope to assemble a broad program bringing together studies dealing with on-land, lake or offshore environments, and applying a variety of methods such as traditional paleoseismic trenching, high-resolution coring, geophysical imaging, tectonic geomorphology, and remote sensing, as well as the application of earthquake geology in seismic hazard assessments. In addition, we encourage contributors describing how to translate fault data or catalogue data into fault models for SHA , and how to account for faults or catalogue issues.

Orogenic systems, including their external fold-and-thrust belts and foreland basin systems are influenced by pre-existing structures due to inherited extension, variations in thermal regime, presence or absence of evaporitic sequences, syn-tectonic sedimentation, imbrication of sub-thrust units, or climatic changes. These factors have a fundamental impact on structural styles as well as the distribution of deformation in space and time. Defining the correct structural style of fold-and-thrust belts including its uncertainty, and understanding the controlling factors are necessary steps towards predicting their long- and short-term evolution, with implications for crustal/lithospheric rheology, mountain building processes and seismic hazard, and for the correct assessment of their potential for hydrocarbon exploration. For these reasons, fold-and-thrust belts and adjacent foreland basin systems represent outstanding places to investigate (active) deformation and surface processes and the way these processes interact to shape mountain belts. On a short-time scale, the pattern of deformation of fold-and-thrust belts provides information on crustal mechanics, the sequence of active faulting and its relation to earthquakes; on a long-time scale, the structure and dynamics of the fold-and-thrust belt - foreland basin systems offers unique insights into the influence of structural, thermal and rheological inheritance, together with coupling between surface and deep processes. Thermochronology has brought new constraints on paleo-burial, exhumation and vertical movements, as well as sediment routing in fold-and-thrust belt-foreland basin systems. In addition, 2D-3D dynamic modeling by means of analog experiments and numerical simulation has been increasingly used as a tool to validate kinematic restorations and to test the influence of varying boundary conditions and material rheology on mountain building at the lithospheric scale.

This session brings together geoscientists to present and discuss multidisciplinary approaches in which a wide range of tools are integrated. We welcome contributions reporting regional case studies and their links to hinterland portions of mountain belts, as well as more topical works on structural uncertainty analysis, seismology, mechanics, temperature evolution, structural geology, geomorphology, exhumation and paleo-elevation, sediment transport and mass balance, surface processes and basin dynamics during pre- and syn-collision stages, together with analogue or numerical modeling approaches. We aim at providing a forum for all disciplines concerned with building and shaping of orogenic wedges by tectonics and climate to meet and discuss their views.