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Interpreting Late Pleistocene Paleoenvironments through the geosites of the Estrela Geopark, Central Portugal

2019-06-18Conference object Open access
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dc.contributor.authorGomes, Hugo
dc.contributor.authorLoureiro, Fábio
dc.contributor.authorCezar, Lucas
dc.contributor.authorCastro, Emanuel
dc.contributor.authorVieira, Gonçalo
dc.date.accessioned2019-06-25T13:49:21Z
dc.date.available2019-06-25T13:49:21Z
dc.date.issued2019-06-18
dc.description.abstractThe UNESCO Global Geoparks are territories whose geological relevance is the starting point for a territorial development strategy. As territories of the 21st century, we want them to be places of science, culture and education, through a holistic vision, which intends to establish strong connections between the geological and cultural heritage. In this context, the geodiversity of Estrela, the richness of its geosite’s diversity and the scenic character of its landscapes make this territory a unique geography, whose structured approach allows for a solid interpretation of the paleoenvironmental evolution of the Estrela Mountain. The Estrela Geopark, with 2,216 km2, centered on the highest mountain in mainland Portugal (1993 m), is a reference for glacial geomorphology in the southwest European context. The territory shows the most significant glacial, fluvioglacial and periglacial landforms and deposits in Portugal, some of them of international relevance. The Geopark shows a diversity of granites and metasedimentary formations, with evidences of contact metamorphism. The geological history of the Estrela Geopark dates back to the Neoproterozoic, with ages older than 650 Ma, represented by an extensive sequence of metasediments dominated by schists and greywackes. These were deformed by the Variscan orogeny, during which, intrusions of granite batholiths occurred. At the end of the orogeny, the relief was razed by erosive processes that extended until the Miocene, when Variscan faults were reactivated leading to the uplift of the Estrela as a pop-up structure. The summit plateau, showing an elevation close to 2000 m, was key for the development of Estrela’s glaciers during the Pleistocene. These were responsible for a remarkable set of glacial landforms and deposits that drive the geological relevance of the Estrela Geopark. The interaction of the Pleistocene glaciers with the geoheritage reflecting the long geological history of the territory, together with the current geomorphological dynamics, long history of human settlement resulting in rich land use features and traditions, lead to the high international relevance of the territory of Estrela, a UNESCO Global Geopark candidate. The Estrela Geopark inventoried and classified 124 geosites, 40% of them related to glacial and fluvioglacial phenomena and periglacial processes. These include glacial valleys, cirques, glacial overdeepenings, several types of moraines and till outcrops, glacial erratics, glacial polished surfaces, and fluvioglacial deposits. The joint interpretation of landforms and sediments, including the palinological record has been crucial for a better understanding of the paleoenvironmental evolution and significance of the Estrela and of its high sensitivity to climate variability and change as a consequence of its high plateau-dominated morphology, bounded by steep marginal scarps and deeply carved valleys.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationGomes et al (2019). Interpreting Late Pleistocene P aleoenvironments through the geosites of the Estrela Geopark, Central Portugal.pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.6/7107
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.subjectGeoparkpt_PT
dc.subjectSerra da Estrelapt_PT
dc.subjectGlaciationpt_PT
dc.subjectGeoheritagept_PT
dc.subjectPaleoenvironmentspt_PT
dc.titleInterpreting Late Pleistocene Paleoenvironments through the geosites of the Estrela Geopark, Central Portugalpt_PT
dc.typeconference object
dspace.entity.typePublication
oaire.citation.conferencePlaceDepartamento de Geociências da Universidade de Coimbrapt_PT
oaire.citation.titleInternational Meeting on Paleoclimate: change and adaptationpt_PT
person.familyNameGomes
person.familyNamede Castro
person.familyNameBrito Guapo Teles Vieira
person.givenNameHugo
person.givenNameEmanuel
person.givenNameGonçalo
person.identifier.ciencia-id3A18-0817-4E55
person.identifier.ciencia-idC81A-8CA9-3705
person.identifier.ciencia-id4817-2559-A895
person.identifier.ciencia-id2519-6583-CAEA
person.identifier.orcid0000-0003-0665-9116
person.identifier.orcid0000-0003-1097-0863
person.identifier.orcid0000-0001-7611-3464
rcaap.rightsopenAccesspt_PT
rcaap.typeconferenceObjectpt_PT
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relation.isAuthorOfPublicatione8160967-527e-4d00-bc2c-404c6f4edece
relation.isAuthorOfPublication.latestForDiscovery0a29c469-0862-4e94-9e06-8f3852822626

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