Showing papers in "Quaternary Science Reviews in 1990"

TL;DR: In this article, a case is made that glacial-to-interglacial transitions involve major reorganizations of the ocean-atmosphere system, and that these reorganizations constitute jumps between stable modes of operation which cause changes in the greenhouse gas content and albedo of the atmosphere.

TL;DR: The Llanquihue Glaciation in Chile is one of the best dated sequences in South America as discussed by the authors, which is the case for the entire Andean Cordillera.

TL;DR: In this article, the Ross Glaciation in northwest South Island is correlated with the first marine faunal evidence of marked cooling in the Wanganui Basin in southern North Island; it is inferred to be in the 2.6-2.4 Ma age range.

TL;DR: In this article, radiocarbon dates of glacial deposits in the Peruvian-Bolivian Andes are used to place the observed phases of glaciation in a common chronological framework.

TL;DR: A wide variety of evidence reflecting, in different ways, the changing climate of the Queen Elizabeth Islands during the Holocene is reviewed in this article, where a general pattern of events can be discerned.

TL;DR: In this article, the flow lines of the North-west European Pleistocene ice sheets can be reconstructed with the aid of fabric measurements and glaciotectonic investigations, from this there is evidence for a more extensive Saalian Glaciation of North Sea area than previously assumed.

TL;DR: In this paper, the thermoluminescence (TL) dating method has been applied to thin loess deposits from China, North America, Alaska, and Europe, and results on deposits from these regions are discussed.

TL;DR: The nature and distribution of glacial drift in the high Andes of Venezuela, Colombia and Ecuador suggest that deposits of only the last two Quaternary glaciations (Isotope Stages 6 and 4 + 2) are present as mentioned in this paper.

TL;DR: The earliest evidence of glaciation during the Early and Middle Quarternary is best preserved in volcanic regions (Patagonia, New Guinea) but is poorly constrained by dating.

TL;DR: In this paper, the formation and preservation of diamict facies (melt-out till) generated in situ by the downwasting of stagnant ice at the margins of continental glaciers is discussed.

TL;DR: The Ross ice drainage system comprises about 25 per cent of the surface area of the Antarctic Ice Sheet and its fluctuations during the Late Quaternary have been determined in two ways: from analyses of three deep ice cores extracted at Byrd (West Antarctica) and at Vostok and Dome Circe (East Antarctica); and from the distribution, stratigraphy and chronology of glacial drifts in the Transantarctic Mountains as mentioned in this paper.

TL;DR: In this paper, a detailed time series for Late Quaternary glacier fluctuations in the Southern Ocean-sub-Antarctic region was constructed for the Falkland Islands and the South Shetland Islands by using radiometric dates from peat, seaweed and fossil remains associated with glacial and raised beach deposits.

TL;DR: In this article, a new interpretation of the Late Devensian (Late Weichselian/Wisconsinan) Lateglacial and early Flandrian (Holocene) environmental history of the Isle of Skye, Inner Hebrides, Scotland is presented.

TL;DR: For example, during the Upper Weichselian glacial maximum (18-20 ka) there was an ice-free corridor between the British and the Scandinavian ice sheets in the northern North Sea as mentioned in this paper.

TL;DR: In this paper, four major Quaternary glaciations, with associated interglaciations and interstadials, have been identified in Tasmania, for which some chronological cotrol is given by radiocarbon and amino acid assays, pollen analysis and relative weathering characteristics.

TL;DR: The origin of the water responsible for depositing these sediments may be: (1) ponding at the end point of the Tsondab River, which at one time extended farther west into the Sand Sea; (2) flooding into interdune corridors when water levels rose in rivers such as the Kuiseb; (3) groundwater seepage into depressions either through dunes that border rivers or from the underlying sandstone; and (4) increased rainfall.

TL;DR: The most detailed dated Quaternary record is from Marion Island where the oldest glaciation (stage 8) had five stadials, the penultimate glaciation had three stadsials, and the last glaciation ended by 12 ka BP as discussed by the authors.

TL;DR: The last major glacial phase in temperate latitudes affected Kilimanjaro, Mount Kenya, Ruwenzori, Nyandarua Range, Mount Elgon, the Ethiopian Highlands and several of the high mountains within and around the Sahara Desert as mentioned in this paper.

TL;DR: In this article, the formation of a late Wisconsinan ice shelf in the Gulf of Maine during the retreat of the Laurentide Ice Sheet is considered to be inappropriate and may not fit the field data that indicate temperate glacial, terrestrial and marine climates for the region between 18 ka and 12 ka.

TL;DR: Weathered glacial deposits outside limits of the last glaciation show that the New Guinea mountains were covered by glacier systems before Oxygen Isotope Stage 5 as mentioned in this paper, which implies that the still tectonically active island was high enough in the Early and Mid Quaternary to support mountain ice caps.

TL;DR: Sejrup et al. as discussed by the authors investigated the age and palaeoglaciological implications of the phase B ice flow markers and found that phase B corresponds to the Jaeren Stadial till, underlying the 40,000-30,000 BP Sandnes Interstadial Clay at Jaeren.