Green C P, Coope G R, Currant A P, Holyoak D T, Ivanovich M, Jones R L, Keen D H, McGregor D F, Robinson J E
Nature. 1984;309(5971):778-81. doi: 10.1038/309778a0.
In the British Quaternary, two post-Cromerian interglacials, the Hoxnian and the Ipswichian, are recognized. Evidence of additional interglacials in this interval is widely accepted in the oceanic record of Quaternary events, and the possibility that at least one additional interglacial of this age is represented in Britain has been discussed. However, in the absence of datable interglacial deposits which are seen to overlie one another, the issue has remained controversial. We describe here deposits at Marsworth, UK (Fig. 1) where there is evidence of two temperate episodes, and of intervening periglacial conditions. Stratigraphical superposition is established beyond any reasonable doubt. The later deposit relates to the temperate woodland stage of the Ipswichian Interglacial. Dating of the earlier temperate material by the 230Th/234U disequilibrium method indicates an interglacial episode not previously established in the British Quaternary.
在英国第四纪，人们识别出了两个克罗马农冰期之后的间冰期，即霍克斯尼间冰期和伊普斯威奇间冰期。在第四纪事件的海洋记录中，这一时期存在更多间冰期的证据已被广泛接受，并且人们也讨论了在英国至少还存在一个这一时期间冰期的可能性。然而，由于缺乏可相互叠覆的可测年的间冰期沉积物，这个问题一直存在争议。我们在此描述英国马斯沃思的沉积物（图1），这里有两个温带阶段以及其间冰缘条件的证据。地层叠覆关系已确定无疑。较晚的沉积物与伊普斯威奇间冰期的温带林地阶段相关。通过钍-230/铀-234不平衡法对较早的温带物质进行测年，结果表明这是一个此前在英国第四纪中未被确认的间冰期阶段。
