The territory of the Republic of San Marino (central-northern Apennines), despite its limited area, has a peculiar geological and morphostructural setting which favoured the preservation of some geomorphologic indicators of periglacial processes active during the late Quaternary cold phases. Distinctly, glacis deposits and related landforms, stratified slope-waste deposits, limestone migrating boulders, and nivation hollows account for a relict landscape which well integrates in the context of a periglacial paleo-environment dating back to the middle-upper Pleistocene glacial stages. On the basis of stratigraphic well-log data the lower boundary of glacis deposits, their areal extension, and the depth of clayey slope-waste deposits have been accurately defined. Actually, thanks to such data a preliminary reconstruction of the relict topography was performed, making it possible to correlate it with the fluvial terraces found along the main valley-sides. Eventually, quantitative geomorphologic analyses have been performed leading to a preliminar paleoenvironmental reconstruction of the massif of Mount Titan and the surrounding area.
Geomorphological indicators of late Quaternary periglacial environment in the Republic of San Marino
NESCI, OLIVIA;SAVELLI, DANIELE;TROIANI, FRANCESCO;
2009
Abstract
The territory of the Republic of San Marino (central-northern Apennines), despite its limited area, has a peculiar geological and morphostructural setting which favoured the preservation of some geomorphologic indicators of periglacial processes active during the late Quaternary cold phases. Distinctly, glacis deposits and related landforms, stratified slope-waste deposits, limestone migrating boulders, and nivation hollows account for a relict landscape which well integrates in the context of a periglacial paleo-environment dating back to the middle-upper Pleistocene glacial stages. On the basis of stratigraphic well-log data the lower boundary of glacis deposits, their areal extension, and the depth of clayey slope-waste deposits have been accurately defined. Actually, thanks to such data a preliminary reconstruction of the relict topography was performed, making it possible to correlate it with the fluvial terraces found along the main valley-sides. Eventually, quantitative geomorphologic analyses have been performed leading to a preliminar paleoenvironmental reconstruction of the massif of Mount Titan and the surrounding area.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
