The polygenetic caves of Cuatro Ciénegas (Coahuila, Mexico): morphology and speleogenesis.

Autor: Leonardo Piccini, Paolo Forti, Italo Giulivo, Marco Mecchia

Publikováno v: International Journal of Speleology, Vol 36, Iss 2, Pp 83-92 (2007)

The Cuatro Ciénegas area is renown worldwide for its thermal springs, which feed a unique ecosystem consisting of many pools, lakes and marshes. The pools also represent a very important water resource in a region characterized by scarce rainfalls.

Externí odkaz: https://doaj.org/article/82872afe4fb94980b752ddc04fd853cf

Genesis of giant sinkholes and caves in the quartz sandstone of Sarisariñama tepui, Venezuela

Autor: Francesco Sauro, Cristina Carbone, Jo De Waele, Andrea Columbu, Leonardo Piccini, Marco Mecchia, Freddy Vergara, Luca Pisani

Publikováno v: Geomorphology. 342:223-238

Quartz sandstone of the Sarisarinama massif in Venezuela hosts the world biggest collapse dolines in quartz-rich lithologies, with volumes up to some millions of cubic meters. Due to extremely complex logistics required to reach the massif, the genes

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2ae82d3293b2e3c3f6910af32b76c0e6
https://doi.org/10.1016/j.geomorph.2019.06.017

Discovering Small Target Sets in Social Networks: A Fast and Effective Algorithm

Autor: Luisa Gargano, Gennaro Cordasco, Ugo Vaccaro, Adele A. Rescigno, Marco Mecchia

Publikováno v: Algorithmica. 80:1804-1833

Given a network represented by a graph $G=(V,E)$, we consider a dynamical process of influence diffusion in $G$ that evolves as follows: Initially only the nodes of a given $S\subseteq V$ are influenced; subsequently, at each round, the set of influe

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::001dca1283d2b520eac33bd7c3bd95a0
https://doi.org/10.1007/s00453-017-0390-5

Geochemistry of surface and subsurface waters in quartz-sandstones: significance for the geomorphic evolution of tepui table mountains (Gran Sabana, Venezuela)

Autor: Jo De Waele, Laura Sanna, Jesus Lira, Nicola Tisato, Freddy Vergara, Leonardo Piccini, Francesco Sauro, Marco Mecchia

Publikováno v: Journal of hydrology (Amst.) 511 (2014): 117–138. doi:10.1016/j.jhydrol.2014.01.029
info:cnr-pdr/source/autori:Marco Mecchia M, Francesco Sauro, Leonardo Piccini, Jo De Waele, Laura Sanna, Nicola Tisato, Jesus Lira, Freddy Vergara/titolo:Geochemistry of surface and subsurface waters in quartz-sandstones: Significance for the geomorphic evolution of tepui table mountains (Gran Sabana, Venezuela)/doi:10.1016%2Fj.jhydrol.2014.01.029/rivista:Journal of hydrology (Amst.)/anno:2014/pagina_da:117/pagina_a:138/intervallo_pagine:117–138/volume:511

Summary In situ measurements of discharge, pH, electric conductivity (EC), temperature, and SiO2 content have been carried out during five expeditions in the last 20 years on the summit plateaus, inside caves and along the rivers of the surrounding l

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4114bf5afe15b825cd6815938b7899df
https://doi.org/10.1016/j.jhydrol.2014.01.029

Comment on 'Sandstone caves on Venezuelan tepuis: Return to pseudokarst?' by R. Aubrecht, T. Lánczos, M. Gregor, J. Schlögl, B. Smída, P. Liscák, Ch. Brewer-Carías, L. Vlcek, Geomorphology 132 (2011), 351–365

Autor: Jo De Waele, Marco Mecchia, Francesco Sauro, Leonardo Piccini

In the recent work of Aubrecht et al. (2011) the presence of “unlithified or poorly-lithified beds” of sands in the quartz-sandstone stratigraphic succession is proposed as a key factor for speleogenesis in the Venezuelan tepuis. In this comment

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::29cb5058eb00a4f291b06c01fba98d73
http://hdl.handle.net/11585/168655