Publication: Influencia de la temperatura sobre la asimetría de pilancones en ambiente granítico. Aplicación de un modelo de regresión lineal
Loading...
Official URL
Full text at PDC
Publication Date
2017
Advisors (or tutors)
Editors
Journal Title
Journal ISSN
Volume Title
Publisher
Sociedad Geológica Mexicana
Citations
Exportar
Abstract
Las pilas representan un tipo de forma presente en casi todos los ambientes climáticos. El trabajo estudia el papel de los ciclos térmicos como un agente importante del modelado y asimetría que presentan las paredes de las pilas en un clima Mediterrá- neo templado - frío. El estudio se ha realizado en el macizo granítico de la Pedriza de Manzanares, zona protegida de gran valor ambiental, incluida en el Parque Nacional de la Sierra de Guadarrama (Madrid, España). El análisis de la variabilidad térmica mediante modelos de regresión perió- dica múltiple, pone de manifiesto la influencia de los ciclos diario y anual en función de las orientaciones norte y sur de las paredes de las pilas. Un modelo matemático de regresión lineal muestra cómo la variabilidad térmica diaria influye en la alteración de las paredes de las pilas, generando superficies planas o de concavidad más o menos pronunciada. El trabajo también establece relaciones entre el grado de alteración de las diferentes partes de las pilas, con la presencia de líquenes y dureza relativa de la roca. Los resultados avalan la hipótesis de relación causal entre la variabilidad térmica y alteración de las paredes de las pilas según su orientación norte o sur.
Weathering pits represent a kind of geological form present in almost all climatic environments. This manuscript explores the role of thermal cycles as important agents in the modelling and asymmetry of the walls of weathering pits in a temperate-cold Mediterranean climate. This study has been developed in the granite massif from La Pedriza in Manzanares which is a protected area, with a great environmental value, allocated in the National Park Sierra de Guadarrama (Madrid, Spain). The analysis of thermal variability was approached using periodic multiple regression that showed the influence of daily and annual cycles depending on the north and south orientation of the pit walls. A mathematical model of linear regression revealed the influence of the daily thermal variability on the alteration of the pit walls generating flat surfaces or a more or less pronounced concavity. This study also established relationships between the alteration degree of different areas of the pits with the lichen presence and with the relative hardness of the rock. The results support the hypothesis of a causal relationship between thermal variability and the shaping of the weathering pits depending on their north or south orientation.
Weathering pits represent a kind of geological form present in almost all climatic environments. This manuscript explores the role of thermal cycles as important agents in the modelling and asymmetry of the walls of weathering pits in a temperate-cold Mediterranean climate. This study has been developed in the granite massif from La Pedriza in Manzanares which is a protected area, with a great environmental value, allocated in the National Park Sierra de Guadarrama (Madrid, Spain). The analysis of thermal variability was approached using periodic multiple regression that showed the influence of daily and annual cycles depending on the north and south orientation of the pit walls. A mathematical model of linear regression revealed the influence of the daily thermal variability on the alteration of the pit walls generating flat surfaces or a more or less pronounced concavity. This study also established relationships between the alteration degree of different areas of the pits with the lichen presence and with the relative hardness of the rock. The results support the hypothesis of a causal relationship between thermal variability and the shaping of the weathering pits depending on their north or south orientation.