Portal de Periódicos da CAPES

Altos estructurales costa afuera en la región de Valparaíso, Chile central

2008; University of Valparaíso; Volume: 43; Issue: 3 Linguagem: Inglês

10.4067/s0718-19572008000300013

0718-1957

Hernan P. Vergara, René Astudillo,

Methane Hydrates and Related Phenomena

By means of satellite 3-D altimetry, a 40 km submarine alignment sited at 32º-33º south latitude on the shelf break in slope, 27 km offshore Valparaíso region, was detected and described.The alignment consists of three peaks at 200, 733 and 880 m below sea level bearing N10ºW and showing 1230, 1350 and 1545 m relief relative to the surface of the upper slope.According to the international standards for undersea features, the names of Los Molles, Horcón and Zapallar are proposed for them in a northward trend.The whole morphological pattern suggests a non confined block displacement of the outer shelf relative to the surface of the upper slope border implying a Holocene subsidence displacement possibly related to the stresses and seismicity generated by the subduction of the Papudo asperity below the middle slope.