意大利南阿尔卑斯晚更新世的霜冻活动和人类占领:来自Caverna Generosa洞穴的微观形态证据

IF 1 4区 地球科学 Q4 GEOSCIENCES, MULTIDISCIPLINARY
Eleonora Sessa, F. Bona, L. Angiolini
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引用次数: 0

摘要

晚更新世的特征是频繁而强烈的气候振荡,在Caverna Generosa洞穴沉积物中有很好的记录。在这项工作中,对洞穴中的样品进行了微观形态分析,在那里地层暴露得特别好和完整,以获得关于MIS3和4期间气候和人类相关过程的时间和空间信息。较老的地层(超过50 ka BP-现在之前-古老)记录了一个非常寒冷的时间间隔,在温暖的季节,冰没有融化,洞穴外几乎没有植被。在这个寒冷的阶段,人类可能在洞穴里呆了很短一段时间,用骨头生火,后来,洞穴熊在最里面的房间里挖了冬眠床。随后(在50 ka BP和40 ka BP之间),本应出现相对短暂的气候改善,导致夏季冰开始融化。在40 ka BP和30 ka BP之间,黄土沉积在洞穴入口处,表明该地区的寒冷和干旱条件。黄土沉积后,随着冻融过程对沉积物的影响,恢复的湿润条件重新建立。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Frost action and human occupation during the Late Pleistocene in the Italian Southern Alps: micromorphological evidences from the Caverna Generosa cave
The Late Pleistocene has been characterised by frequent and intense climatic oscillation, well recorded in the Caverna Generosa cave deposits. In this work, micromorphological analyses have been performed on samples from the cave where the stratigraphy is particularly well exposed and complete, in order to obtain temporal and spatial information on climate- and human-related processes during MIS3 and 4. The older layers (more than 50 ka BP - Before Present - old) record a very cold time interval, where ice did not melt during the warmer season, and with little or no vegetation outside the cave. During this cold stage, probably, humans spent a short period in the cave, using bones to light the fire and, later, cave bears dug their hibernation beds in the innermost room. Subsequently (between 50 ka BP and 40 ka BP) a relatively brief climatic amelioration should have occurred, leading to the onset of ice melting during the summer season. Between 40 ka BP and 30 ka BP, loess deposited in the cave entrance, indicating cold and arid conditions in the area. After loess deposition, recovered wet conditions have re-established with freeze and thawing processes influencing the sediments.
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来源期刊
Italian Journal of Geosciences
Italian Journal of Geosciences GEOSCIENCES, MULTIDISCIPLINARY-
CiteScore
2.90
自引率
11.10%
发文量
25
审稿时长
>12 weeks
期刊介绍: The Italian Journal of Geosciences (born from the merging of the Bollettino della Società Geologica Italiana and the Bollettino del Servizio Geologico d''Italia) provides an international outlet for the publication of high-quality original research contributions in the broad field of the geosciences. It publishes research papers, special short papers, review papers, discussion-and-replies for their rapid distribution to the international geosciences community. The journal is firstly intended to call attention to the Italian territory and the adjacent areas for the exceptional role they play in the understanding of geological processes, in the development of modern geology and the Earth sciences in general. The main focus of the journal is on the geology of Italy and the surrounding sedimentary basins and landmasses, and on their relationships with the Mediterranean geology and geodynamics. Nevertheless, manuscripts on process-oriented and regional studies concerning any other area of the World are also considered for publication. Papers on structural geology, stratigraphy, sedimentology, basin analysis, paleontology, ecosystems, paleoceanography, paleoclimatology, planetary sciences, geomorphology, volcanology, mineralogy, geochemistry, petrology, geophysics, geodynamics, hydrogeology, geohazards, marine and engineering geology, modelling of geological process, history of geology, the conservation of the geological heritage, and all related applied sciences are welcome.
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