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@InProceedings{Rossetti:2015:ImUnNe,
               author = "Rossetti, Dilce de F{\'a}tima",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "Imaging underwater neotectonic structures in the Amazonian 
                         lowland",
            booktitle = "Anais...",
                 year = "2015",
               editor = "Gherardi, Douglas Francisco Marcolino and Arag{\~a}o, Luiz 
                         Eduardo Oliveira e Cruz de",
                pages = "185--191",
         organization = "Simp{\'o}sio Brasileiro de Sensoriamento Remoto, 17. (SBSR)",
            publisher = "Instituto Nacional de Pesquisas Espaciais (INPE)",
              address = "S{\~a}o Jos{\'e} dos Campos",
             abstract = "Previous documentation has proposed tectonic activity from the 
                         Neogene to Holocene as one important control on the drainage 
                         development in the Amazonian lowland. However, recording tectonic 
                         structures in this region has been challenging due to 
                         environmental difficulties including the low topography and dense 
                         vegetation cover that do not favor natural exposures. For this 
                         reason, the role of tectonics in determining river dynamics, 
                         morphology, and sediment deposition in Amazonia has been suggested 
                         with caution. Despite limitations, morphostructural lineaments 
                         have provided useful information to support fault reactivation in 
                         several areas of the Amazonian lowland. However, further 
                         documentation is required to map the faults and describe their 
                         geometry. This approach is essential to better understand the 
                         geotectonic model of this region. In this work, analyses of 
                         highresolution optical imagery of three Amazonian shallow water 
                         lakes provided exceptional views of an abundance of linear 
                         features on the beds of these lakes. Although based on indirect 
                         evidence from remote sensing data, the quality of the images 
                         allowed the geometry of these underwater features to be 
                         characterized in detail. The most striking are sets of NESW 
                         lineaments that frequently intercept NWSE trending lineaments with 
                         offsets of up to 500 m in the horizontal plane. These 
                         characteristics support dextral faults with strikeslip rates in 
                         the study areas. The faults display trends compatible with the 
                         geotectonic model proposed for the Brazilian Amazonia region. They 
                         also control the morphology of lakes and rivers, as indicated by 
                         the fact that they parallel and/or continue into straight 
                         lineaments that define lake margins and river courses, including 
                         the courses of large rivers, such as the Solim{\~o}es and 
                         Amazonas Rivers. Available radiocarbon ages of deposits from the 
                         lake bed sediments and from related floodplain deposits are 
                         consistent with the proposal of faulting during the latest 
                         Holocene, even only a few hundred years ago.",
  conference-location = "Jo{\~a}o Pessoa",
      conference-year = "25-29 abr. 2015",
                 isbn = "978-85-17-0076-8",
                label = "41",
             language = "en",
         organisation = "Instituto Nacional de Pesquisas Espaciais (INPE)",
                  ibi = "8JMKD3MGP6W34M/3JM4532",
                  url = "http://urlib.net/rep/8JMKD3MGP6W34M/3JM4532",
           targetfile = "p0041.pdf",
                 type = "Geologia",
        urlaccessdate = "25 jan. 2021"
}


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