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Some collective papers related to the advances of the target areas of the INQUA Project SAQint3 (Interactions between climatic forcing, tectonics and volcanism during the Late Quaternary: a multidisciplinary approach applied on key regions of South America; yrs. 2013/2015) is integrated in a special issue of Quaternary International at the end of the inter-congress period. It is dedicated to a comprehensive analysis of climate and tectonic influences on terrestrial processes of representative regions of the continent during the Quaternary. Most of the first authors are developing countries researches that are members of the IFG and the respective INQUA project. Earlier career researchers value the opportunity of contributing their own data on an integrated basis.The TERPRO-INQUA Focus Group is mainly composed of researchers in Quaternary Geology from low-GDP countries based in South America (SA) that initially participated in the SAm-GeoQuat Skill Enhancement Initiative in 2012 (INQUA 1225S). The main activity for the 4 years period focused on the hosting of Symposia and Workshops of the group at national congresses and the co-organization of international Workshops of the IFG (Argentina, Brazil, Chile) in order to reinforce the interactions and feedback between international specialists in neotectonics of South America and geoscientists working on surface processes that influenced actively the landscape and the planned scientific work in multiple areas of the continent. Also Field trips and an international Field Course (Argentina) were organized. Integration between scientists dedicated to the research of the Quaternary in SA, specialized in diverse geological sub-disciplines, was achieved from the activity of the IFG and the associated 1311 project. Also, more integration was accomplished between foreign specialists working in some regions of SA with active local specialists. During the year 2014 the SAm-GeoQuat Group had around 60 participants representing 9 countries, which 7 were low-GDP countries based in SA. The participants are mainly South American geologists actively working in scientific institutions and demonstrated interest in international participation. An affiliation with INQUA of local SS and ECRs specialists involved in the FG also increased the synergy between different international efforts in Quaternary science in the continent. The group also brings together active local scientists who may still be little-known in the INQUA scientific community, giving more international exposure and a great opportunity to better show the results of their investigations, especially to PhDs. Most of the participants are senior scientists and young researchers that in general have limited money resources to keep their involvement in international scientific activities. Continental records from SA such as loess-palaeosols sequences, lacustrine sediments, floodplain sediments, glacial deposits, between others, were used to reconstruct environmental response to climatic changes in the last years. Independently, some studies are focused on the influence of volcanism and tectonics on the Quaternary landscape evolution of some regions of SA, especially in some of the areas of the Andes and in large basins of the extra-Andean region. The QI volume integrates some advances related to tectonics and surface processes interaction. The initiative of the volume aims to show the state of knowledge reached in some regions. In the Andean region, tectonic and volcanic processes generated significant changes in the landscape, in interaction with glacial, physical weathering, fluvial and mass transports processes. For intraplate extra-Andean SA, surface deformation occurred also at unexpected locations, but with relative slow displacement rates. Hence, one of the objectives of the volume is to present contributions dedicated to the distinction of features caused by major climatic changes from environmental variations induced by local or regional factors such as volcano-tectonic forcings along some representative regions of SA, that are very important to enhance integrated analyses of the exogenic vs. endogenic processes interplay on the Late Quaternary landscape evolution. Numerical estimates of surface geological processes interplaying in different geological environments are included in some contributions.

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