Papers by Stella Moreiras
Geomorphology, Jan 1, 2005
A qualitative landslide susceptibility zonation map (scale 1:100,000) of a sector of the Río Mend... more A qualitative landslide susceptibility zonation map (scale 1:100,000) of a sector of the Río Mendoza Valley was prepared by overlapping thematic maps of conditioning factors. The main parameters affecting the distribution of landslides in the area were ranked according to slope instability. Geomorphological surveys and field observations enabled identification of 300 historical or prehistoric landslides. A landslide inventory was developed classifying the processes involved in slope instability, and analysing the degree of activity. The two most influential factors in decreasing slope stability were lithology and slope angle. D
Landslides, Jan 1, 2005
Caracterización de las fallas activas en el piedemonte mendocino. View project Analysis of neotec... more Caracterización de las fallas activas en el piedemonte mendocino. View project Analysis of neotectonic in the Andean piedemont (30º 40´ -33º) and its related hazard. View project Abstract Temporal distribution of landslides can be verified by means of climatic anomalies linked to the ENSO phenomenon. An increasing number of landslides triggered by rainfall have been recorded during warm episodes (El Niaeo) in the Cordillera Frontal, and a decreasing number during cold episodes (La Niaea), concluding that this geological province is mainly influenced by the Pacific Anticyclone. However, slope instability in the Precordillera, located east of the Cordillera Frontal, seems to be mainly influenced by the Atlantic Anticyclone. Analysis of variance shows that there is no significant difference between landslide records and cold-warm episodes, and a higher number of landslides were recorded in years linked to wet periods than during dry periods. Furthermore, the precipitation threshold value associated with landslide occurrence and antecedent precipitation are analysed.
Earth Surface Processes and Landforms, Jan 1, 2004
Quaternary international, Jan 1, 2006
The frequency of debris flows and rockfalls was estimated by temporal distribution of these event... more The frequency of debris flows and rockfalls was estimated by temporal distribution of these events during the last 50 years. This parameter was expressed by annual probability of occurrence and mean interval of recurrence of historical events. More recurrent events in this sector of the Central Andes are associated with the Guido locality and tunnels situated along International road No. 7. Furthermore, these events are more frequent in Cordillera Frontal where the mean recurrence interval was lower than in Precordillera. The maximum interval of recurrence is rarely greater than 20 years, showing the activity of these events on human lives and infrastructure in this region. The accuracy of the determined recurrence frequency is discussed. A future scenario indicates that landslides will be probably more frequent under global climate change. As a consequence, those most vulnerable elements in the region, the international access routes, may be severely damaged in the future, implying an adverse impact in our regional economy. r
Quaternary international, Jan 1, 2006
Placetas Amarillas-l rock avalanche located at 32°43'S-69°25'W was geomorphologically, stratigrap... more Placetas Amarillas-l rock avalanche located at 32°43'S-69°25'W was geomorphologically, stratigraphically and chronologically studied. This extraordinary event dammed a secondary gully causing the formation of a barrier-lake, indicated by relict lacustrine and diatomite deposits. Stratigraphically, its deposit is overlain by alluvial fans where three tephra layers are intercalated. Dating using Ar-Ar method of the middle ash level at 350±80ka determined a Middle Pleistocene or older age for this event. Furthermore, the younger age of Placetas Amarillas-2 is established by relative dating techniques such as soil development and rock varnish development. The ages established in this research indicate that Placetas Amarillas-l may be temporally correlated with the Tigre Dormido rock avalanche, suggesting that the occurrence of these rock avalanches may be related to regional neotectonic activity. Nevertheless, climatic conditions are not underestimated as the Tigre Dormido event occurred before formation of an outwash terrace related to a glaciation of Early Middle Pleistocene age.
Quaternary international, Jan 1, 2006
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Developments in Earth Surface Processes, Jan 1, 2009
unesco.org
http://igcp586y.syr.edu/IGCP_586Y The IGCP 586Y website is hosted through the College of Arts and... more http://igcp586y.syr.edu/IGCP_586Y The IGCP 586Y website is hosted through the College of Arts and Sciences at Syracuse University. Hoke maintains the website, as specially requested the domain name igcp586y.syr.edu for the site. The webpage is standalone and is not linked directly though Hoke's personal or group websites also hosted at Syracuse University. The domain name can be maintained indefinitely at no cost. The only limitation is that someone with network access at Syracuse University must be responsible for modifying the pages. As with all websites the IGCP586Y site is constantly being updated and adjusted as the project evolves and following discussion and input from participants at the meetings. We are will expand the Spanish language section of the site shortly.
Laguna, Jan 1, 2005
Atlas home || Conferences | Abstracts | about Atlas Holocene environmental catastrophes in South ... more Atlas home || Conferences | Abstracts | about Atlas Holocene environmental catastrophes in South America: From the lowlands to the Andes March 11-17, 2005 Laguna Mar Chiquita Miramar, Córdoba Province, Argentina. Organizers ...
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Papers by Stella Moreiras