Quaternary Mammals from Central-Western Argentina in the Stratigraphic Context of Southern South America

IF 2.3 Q2 GEOSCIENCES, MULTIDISCIPLINARY Quaternary Pub Date : 2023-12-04 DOI:10.3390/quat6040059
E. Cerdeño, Natalia P. Lucero, J. Chiesa
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Abstract

This is an updated contribution to the Quaternary geology and paleontology from central-western Argentina, focused on San Luis Province. It is mostly based on unpublished data; only some fossils had previously been briefly mentioned in broader faunal contexts. The fossil-bearing sediments correspond to eolian and alluvial environments of moderate energy, dominated by sands and sandy silts. They overlie high-energy fluvial cycles and underlie edaphic horizons. They have a wide distribution, and several radiocarbon dates allow their regional correlation. Stratigraphic sequences with the precise origin of fossils allow for the improvement of lithostratigraphic and faunal correlations with the Pampean Region (central and east Argentina; La Pampa and Buenos Aires provinces), where Pleistocene assemblages are better known, but also with central-western (Cuyo Region), northwestern, and northeastern Argentina. Faunal remains correspond to large mammals, represented by xenarthrans (Cingulata and Tardigrada), macraucheniids (Litopterna), gomphotheres (Proboscidea), and equids (Perissodactyla), a typical Pleistocene mixture of native (xenarthrans and litopterns) and immigrant mammals.
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南美洲地层背景下的阿根廷中西部第四纪哺乳动物
这是对阿根廷中西部第四纪地质学和古生物学的最新贡献,主要集中在圣路易斯省。它主要基于未发表的数据;以前只有一些化石在更广泛的动物背景中被简要地提到过。含化石沉积物属于中等能量的风成和冲积环境,以砂质和砂质粉砂为主。它们覆盖在高能量的河流旋回之上,在地平面之下。它们分布广泛,几个放射性碳测年证实了它们的区域相关性。具有精确化石起源的地层层序可以改善与潘潘地区(阿根廷中部和东部;La Pampa和Buenos Aires省),在那里更新世的组合更为人所知,但也与阿根廷中西部(Cuyo地区),西北部和东北部。动物化石对应的是大型哺乳动物,代表有异爪目(钩爪目和熊爪目)、巨爪目(狐目目)、齿形目(喙目目)和马科(异爪目),这是一个典型的更新世本土(异爪目和狐目)和移民哺乳动物的混合体。
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来源期刊
Quaternary
Quaternary GEOSCIENCES, MULTIDISCIPLINARY-
CiteScore
3.30
自引率
4.30%
发文量
44
审稿时长
11 weeks
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