末次冰川期意大利西北部(阿尔卑斯山南部)的古气候和古环境:来自布科-德尔弗拉特洞穴(PREVALLE-BRESCIA)的小型哺乳动物记录

IF 1.6 3区 地球科学 Q2 GEOLOGY
F. Bona, M. Baioni, E. Cilli
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引用次数: 0

摘要

通过对Buco del Frate洞穴小型哺乳动物的研究获得的古气候和古环境数据表明,大约40000年前(MIS3),加尔达湖以西的布雷西亚省东部,其特征是存在开阔的针叶林环境和穿过洞穴平原的水道。具体而言,与在Buco del Frate洞穴西南20公里的Ghedi测量的1960-90年的气候数据相比,大约40000年前意大利西北部这一地区的古气候条件包括平均温度低约4°C,降雨量低约30%。根据收集的数据,我们发现,波谷西部,加尔达湖以西,具有草原状环境的特征,与几乎同时代的Setteplesini di Bondeno(Ferrara)遗址没有太大区别,该遗址被定义为“猛犸草原”。我们还注意到,如果将波谷西部与同一地区的高山和中山沉积物进行比较,其特点是更像草原的环境。事实上,在可能更隐蔽的地区,山区的环境表明存在更多树木(或者至少是灌木)的环境。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
PALEOCLIMATE AND PALEOENVIRONMENT IN NORTH-WESTERN ITALY (SOUTHERN ALPS) DURING THE LAST GLACIAL STAGE: THE SMALL-MAMMAL RECORD FROM THE BUCO DEL FRATE CAVE (PREVALLE – BRESCIA)
The palaeoclimatic and palaeoenvironmental data obtained by the study of the Buco del Frate cave small-mammals indicate that, around 40,000 years ago (MIS3), the eastern part of the province of Brescia, immediately to the west of Lake Garda, was characterised by the presence of open taiga environment and watercourses crossing the plain facing the cave. Specifically, the palaeoclimatic conditions of this part of north-western Italy around 40,000 years ago – compared to climate data for the years 1960-90 measured at Ghedi, 20 km southwest of the Buco del Frate cave – involved average temperatures some 4° C cooler and rainfall some 30% lower. Based on the collected data we show that the western part of the Po Valley, west of Lake Garda, was characterized by a steppe-like environment, not too different from the almost contemporaneous site of Settepolesini di Bondeno (Ferrara), defined as "mammoth steppe". We also note that the western Po Valley, if compared with deposits from high- and medium-mountain contexts in the same area, was characterized by a more steppe-like environment. Indeed, the mountain settings, in perhaps more sheltered areas, indicate the presence of environments with more trees (or, at least, bushes).
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来源期刊
CiteScore
3.60
自引率
4.30%
发文量
28
审稿时长
>12 weeks
期刊介绍: The Rivista Italiana di Paleontologia e Stratigrafia was founded in 1895. It publishes original papers dealing with all fields of paleontology and of stratigraphy, from Italy and the Mediterranean to the Tethys, as well across the globe from China to North America.
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