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The present work offers a preliminary analysis of the river network with tertiary antecedents of the Galician SE. The geomorphological observations of the area are centred on the cartography of erosive terraces, scrolled canals, hanging meanders, elbows of capture, and anomalous networks. For its interpretation we interface them with the thalwegs of the principal courses and the Alpine fractures charted by other authors. We propose a chronology for the identified fluvial processes, a chronology which points to a greater river network than has been estimated so far. Of these seven identified tendencies three presented a regional entity (ENE-WSW, NE-SW, N-S) and four local (NW-SE, SW-NE, SE-NW, S-N). The principal character of the paleo-network ENE-WSW (river Sil) is confirmed. And as a hypothesis we propose, for the Sierra de Queixa-San Mamede, the character of positive paleo-relief of Mesozoic inheritance. This relief has undergone severa1 processes of isostatic raising and also tectonic during the Alpine Mountain-building. These raisings have caused the superimposition of captures in the SE spurs of the Sierra de Queixa-San Mamede.  El presente trabajo ofrece un an&#225;lisis preliminar de la red fluvial con antecedencia terciar&#237;a del sureste gallego. Las observaciones geomorfol&#243;gicas de campo se centran en la cartograf&#237;a de terrazas erosivas, canales abandonados, meandros colgados, codos de captura y redes an&#243;malas. Para su interpretaci&#243;n se confrontaron con los thalwegs de los cursos principales y las fracturas alpinas cartografiadas por otros autores. Se propone una cronolog&#237;a para los procesos fluviales identificados; cronolog&#237;a que apunta una antig&#252;edad de la red fluvial mayor a la estimada hasta el momento. De las siete tendencias identificadas, tres presentan una entidad regional (ENE-WSW, NE-SW, N-S), y cuatro local (NW-SE, SW-NE, SE-NW, S-N). Se confirma el car&#225;cter principal de la paleorred ENE-WSW (caracterizada por el r&#237;o Sil) y como hip&#243;tesis se propone, para la Sierra de Queixa-San Mamede, el car&#225;cter de paleorrelieve positivo de herencia mesozoica. Este relieve habr&#237;a sufrido varios procesos de levantamiento isost&#225;tico y tambi&#233;n tect&#243;nico durante la Orogenia Alpina. Estos levantamientos habr&#237;an provocado la superposici&#243;n de capturas en las estribaciones surorientales de la Sierra de Queixa-San Mamede

Indicios de antecedencia en la red fluvial del sureste de Galicia