Environmental History of Small Lake Catchments in the Larsemann Hills, Antarctica

Metadata record for data from ASAC Project 31See the link below for public details on this project.Ammoelphidiella antarctica Conato and Segre occurs in thin unconsolidated muddy sediments at 55m above sea level in the Larsemann Hills, East Antarctica. The specimens appear to be in situ and this implies an early Pliocene age for the sediments and their contained faunas, similar to that of recently identified early to mid-Pliocene age sediments in the Vestfold Hills about 100 km distant. This is the first evidence from foraminifera of Pliocene sediments around the margin of the East Antarctic craton and augurs well for future discoveries of coeval sediments. Dominant elements of the entirely calcareous benthic fauna are Globocassidulina crassa (d'Orbigny), and Cassidulinoides cf. parkerianus (Brady).

ASAC 31号项目数据集的元数据记录。有关该项目的公开详情，请参阅下方链接。Conato与Segre命名的南极安摩砂卷虫（Ammoelphidiella antarctica Conato et Segre）发现于东南极拉斯曼丘陵海拔55米处的薄层疏松泥质沉积物中。该标本疑似为原地埋藏，据此可推断该沉积物及其所含动物群的形成时代为上新世早期，这与约100公里外的韦斯特福尔丘陵（Vestfold Hills）新近发现的早-上新世中期沉积物时代相近。这是东南极克拉通（East Antarctic craton）周边上新世沉积物中发现的首个有孔虫（foraminifera）证据，为未来发现同期沉积物带来了良好前景。该全钙质底栖动物群的优势类群为厚球背壳虫（Globocassidulina crassa d'Orbigny）与帕克森背壳虫相似种（Cassidulinoides cf. parkerianus Brady）。