Caracterización geoquímica y petrográfica de las unidades geológicas del macizo del volcán Poás, Costa Rica

Ruiz, Pablo; Gazel, Esteban; Alvarado, Guillermo E.; Carr, Michael J.; Soto, Gerardo J.

doi:10.15517/rgac.v0i43.3457

Cited by 10 publications

(19 citation statements)

References 12 publications

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“…In both sites, previous archeological and geological studies were incorporated into this study. The geological and geomorphological information in the Poás region is based on works by Ruiz et al (2010), Salani and Alvarado (2010), Alvarado (2008) Alvarado et al (2011), andRuiz (2012), and the archeological information relies heavily on the works of Hurtado de Mendoza and Castillo (2005), Zúñiga Jiménez (2005), and Alvarado et al (2011). In the Guayabo region, geomorphological information is based on Obando and Peraldo (2011) and part of the archeological information is based on Fonseca and Hurtado de Mendoza (1984), Acuña (1987), Aguilar (1972), and Alarcón (2012Alarcón ( , 2013Alarcón ( , 2017.…”

Section: Sites Of Studymentioning

confidence: 99%

Geomorphological Insights on Human-Volcano Interactions and Use of Volcanic Materials in Pre-Hispanic Cultures of Costa Rica through the Holocene

Ruiz¹,

Mana

Gutierrez³

et al. 2018

Front. Earth Sci.

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Critical Zones (CZ) in tropical environments, especially near active volcanoes, are rich in resources such as water, food, and construction materials. In Central America, people have lived near volcanic centers for thousands of years and learned to take advantage of these resources. Understanding how pre-Hispanic societies lived in this type of CZs and interacted with volcanoes, provides us with insights on how to reduce the negative impact derived from volcanic activity in modern cities. In this multidisciplinary approach we focus on two case studies in Costa Rica near Poás and Turrialba volcanoes, which are currently active, in order to obtain a comprehensive view of human-volcano interactions through time. We use a methodology based on historical accounts, geological and archeological fieldwork, geomorphological characterization based on remote sensing techniques and past (pre-Hispanic), and present land use analysis. The northern Poás region represents a case of a poorly developed pre-Hispanic society, which subsisted mainly on hunting and gathering activities, had no permanent settlements and was probably affected by the activity of the Hule and Río Cuarto maars. In spite of their vulnerability and lack of infrastructure, they used geomorphology to their advantage, achieving natural protection. Conversely, the Guayabo National Monument (GNM) near Turrialba Volcano represents a cultural peak in pre-Hispanic societies in Costa Rica. Archeological remains and structures at this site indicate that this society had a good understanding of physical and geological processes and was therefore able to take advantage of natural resources for water and food supply, construction, and protection as well as hazard prevention and mitigation. The use of new technologies, some accessible and low-cost such as Google Earth and others with restricted access and higher costs such as LiDAR, allowed us to complete a rapid and efficient characterization of land use and geomorphological features of the study area. This study helps to establish how some locations near volcanic edifices are more prone the effects of volcanic hazards than others and why this data should be included in volcanic risk assessment and land planning processes.

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Section: Sites Of Studymentioning

confidence: 99%

Geomorphological Insights on Human-Volcano Interactions and Use of Volcanic Materials in Pre-Hispanic Cultures of Costa Rica through the Holocene

Ruiz¹,

Mana

Gutierrez³

et al. 2018

Front. Earth Sci.

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“…La estructura del Puente de Piedra es de origen volcánico y se encuentra dentro del edificio del estratovolcán complejo Poás, de edad < 1 Ma (Ruiz et al, 2010, Alvarado y Gans 2012. Comparativamente a nivel mundial con otros arcos naturales que tienen funcionabilidad en su parte superior (Cuadro 1), la edad de sus materiales es relativamente joven y es de tamaño pequeño.…”

Section: Ubicación Del Puente De Piedraunclassified

“…El basamento geológico de la zona lo conforman depósitos de tobas e ignimbritas, que podrían estar asociados con el Miembro Puente Mulas de la Formación Colima, o con la ignimbrita de la Formación Tiribí (atribuida al volcán Barva) y que habían sido expuestos por la erosión fluvial. El sector sur del área de estudio se caracteriza por la presencia de lavas de la Unidad Achiote de la fase temporal Paleo Poás, la cual fue descrita por (Ruiz et al, 2010y Huapaya y Rojas, 2012. C) Mapa de uso del tierra, con sus porcentajes según su uso, relativos al área de estudio, generado para este trabajo a partir de fotografías aéreas del PRUGRAM (2010) y Google Earth.…”

Section: Caracterización Geomorfológicaunclassified

“…Ar (Ruiz et al, 2010), esta unidad tiene un rango de edad de 538 -283 ± 15 ka, estas lavas fueron datadas a una distancia Fig. 3: A) Imagen lídar del Puente de Piedra, con las dimensiones de la parte superior.…”

unclassified

“…Sin embargo, según Alvarado (2015) y de acuerdo con dataciones de Alvarado y Gans (2012) las ignimbritas de esta zona provienen de la Paleo-Cordillera, con edades de 0,44 -0,50 Ma. En el presente trabajo de acuerdo con las relaciones estratigráficas, se considera que Puente de Piedra podría tener una edad cercana a 0,5 Ma y que corresponde con el miembro intermedio de la Formación Colima, conocido como Puente Mulas, el cual según Ruiz et al (2010), en la sector sur del volcán Poás se presenta como ignimbritas con un espesor de hasta 20 m. El volcán que dio origen a esta ignimbrita aún se desconoce y podría atribuirse al Poás o Barva hasta que se tenga mejores correlaciones estratigráficas y dataciones radiométricas de otros afloramientos de ignimbritas en la zona, incluyendo las del puente específicamente.…”

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Evaluación integral de “Puente de Piedra”, Grecia, Costa Rica y su potencial turístico

Ruiz

Suárez

2017

Rev. Geol. Amér. Central

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Abstract:Puente de Piedra is a structure located in the southwest flank of the Poás volcano, originated from differential erosion processes active for thousands of years in volcanic rocks (ignimbrite deposits) by the Poró river. It was declared a natural heritage of Costa Rica on April 21, 1994, under the decree number 23 1111-06 and because of its nature as relatively young age (Middle Pleistocene), size and functionality is one of the few worldwide. For these reasons, its preservation is very important to be enjoyed by future generations. A geological and geomorphological characterization of the bridge is presented, also the region in which it is located, along with an assessment of their current status and inventory of damages, human activities that take place in the region are also identified and how the changes in them could negatively impact it in the future. To have the detailed geomorphological description of the bridge, we used a lidar survey and a 3D model to obtain all the parametric data that also can be use as historical memory of the structure. The results of this work can be the starting point for defining an intervention program, conservation and maintenance of the structure, also an incentive for the community of Grecia that can have greater tourist use of this site. Currently the tourism is detached and with no interconnections in terms of geological, biological and cultural aspects. Linking these fields could help to improve the development of communities near the volcano and take the first steps towards a concept of geopark. Keywords: natural bridge, differential erosion, lidar, evaluation, slopes, traffic, geopark.Resumen: El Puente de Piedra es una estructura ubicada en el flanco suroeste del volcán Poás, fue formada por procesos de erosión diferencial en rocas volcánicas (depósitos ignimbríticos) que han estado activos por miles de años, en el río Poró. Su importancia radica en que fue declarado patrimonio natural de Costa Rica el 21 de abril de 1994, bajo el decreto número 23 1111-06, y que por sus características como: edad (Pleistoceno Medio) tamaño y funcionalidad, es uno de los pocos que hay en el mundo. Por estas razones es que su preservación es muy importante para asegurar el disfrute por las próximas generaciones. Se presenta una caracterización geológica y geomorfológica no solo el puente, si no la región en la que está ubicado, además de la evaluación de su estado actual con un inventario de daños Ruiz, P. y Suárez, C. (2017). Evaluación integral de "Puente de Piedra", Grecia, Costa Rica y su potencial turístico.

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Late Cenozoic tephrostratigraphy offshore the southern Central American Volcanic Arc: 1. Tephra ages and provenance

Schindlbeck

Kutterolf

Freundt

et al. 2016

Geochem Geophys Geosyst

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We studied the tephra inventory of 18 deep-sea drill sites from six DSDP/ODP legs (Legs 84, 138, 170,202, 205, and 206) and two IODP legs (Legs 334 and 344) offshore the southern Central American Volcanic Arc (CAVA). Eight drill sites are located on the incoming Cocos plate and 10 drill sites on the continental slope of the Caribbean plate. In total, we examined 840 ash-bearing horizons and identified 650 of these as primary ash beds of which 430 originated from the CAVA. Correlations of ash beds were established between marine cores and with terrestrial tephra deposits, using major and trace element glass compositions with respect to relative stratigraphic order. As a prerequisite for marine-terrestrial correlations, we present a new geochemical data set for significant Neogene and Quaternary Costa Rican tephras. Moreover, new Ar/Ar ages for marine tephras have been determined and marine ash beds are also dated using the pelagic sedimentation rates. The resulting correlations and provenance analyses build a tephrochronostratigraphic framework for Costa Rica and Nicaragua that covers the last <15 Myr. We define 39 correlations of marine ash beds to specific tephra formations in Costa Rica and Nicaragua; from the 4.15 Ma Lower Sandillal Ignimbrite to the 3.5 ka Rincon de la Vieja Tephra from Costa Rica, as well as another 32 widely distributed tephra layers for which their specific region of origin along Costa Rica and Nicaragua can be constrained.

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Caracterización geoquímica y petrográfica de las unidades geológicas del macizo del volcán Poás, Costa Rica

Cited by 10 publications

References 12 publications

Geomorphological Insights on Human-Volcano Interactions and Use of Volcanic Materials in Pre-Hispanic Cultures of Costa Rica through the Holocene

Geomorphological Insights on Human-Volcano Interactions and Use of Volcanic Materials in Pre-Hispanic Cultures of Costa Rica through the Holocene

Evaluación integral de “Puente de Piedra”, Grecia, Costa Rica y su potencial turístico

Late Cenozoic tephrostratigraphy offshore the southern Central American Volcanic Arc: 1. Tephra ages and provenance

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