Resumen

PALACIOS, Silvia Beatriz  y  PERUCCA, Laura Patricia. Ephemeral geological heritage: methodological proposal for the inventory and evaluation of structures generated by soil liquefaction during earthquakes, San Juan-Argentina. Bol. Soc. Geol. Mex [online]. 2020, vol.72, n.1, e020219.  Epub 22-Dic-2020. ISSN 1405-3322.  https://doi.org/10.18268/bsgm2020v72n1a020919.

In this work, several features of liquefaction are valued as ephemeral heritage structures. These structures usually form during earthquakes of moderate to large magnitude and record important information about the characteristics of the seismic events. In this way, it is possible to act appropriately for their treatment and conservation at the time of its formation. The study of Ephemeral Geological Heritage is a recent research topic in geology that constitutes scientific and cultural resources. The 1894, 1944, 1952, and 1977 earthquakes with epicenters in the province of San Juan, Argentina induced liquefaction structures such as cracks, sand volcanoes, craters, and differential settlements, which caused serious damage to dwellings, and agro-industry in the region. There are several photographic records of such secondary effects. In this work, the analysis of these structures was limited to the distal portion of the Tulum valley, since these areas are susceptible to soil liquefaction. The objective of this study is to establish guidelines for preserving in situ liquefaction structures, considering the fragility of the material and the natural ephemeral time of preservation. Finally, we give some basic recommendations for a survey of liquefaction structures in situ so that in the future, a protocol may be established and accepted by the scientific community for designating ephemeral heritage structures.

Palabras llave : earthquake; liquefaction; ephemeral heritage; Tulum valley; Argentina.

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