摘要:

Marine transgression and regression, i.c. movements of the sea relative to the land, occurred in south‐western Scotland during the Holocene epoch. Wigtown Bay may have been more extensive than now, and the (now abandoned) Lochar Gulf may have been in existence at the beginning of the Epoch. Holocene marine transgression in S. Ayrshire began after 8400 B.P. Commencement of marine transgression from place to place along the northern shore of the Solway Firth was diachronous: between 9400 and 7200 B.P. Culmination also was diachionous; the Lochar Gulf was abandoned by the sea by 6600 B.P., but transgression continued in the eastern Solway Firth until about 5600 B.P., and near the head of Wigtown Bay until 5000 B.P. or later. A pause in regression of the sea from its maximum occurred about 2000 B.P. Comparison of curves for relative movements of sea level suggests that land uplift in S.W. Scotland between 9200 and 6000 B.P. was rapid compared with contemporaneous land uplift in N.W. England, Sweden, and the Netherland

ISSN:0300-9483    

DOI:10.1111/j.1502-3885.1975.tb00688.x

出版商:Blackwell Publishing Ltd    

年代:1975

数据来源: WILEY

摘要:

A review is presented of published data on Early and Middle‐Flandrian pollen zones recorded at various sites in the Eastern Highlands of Scotland. This reveals a number of screpancies from site to site, particularly with regard to the position and timing both of the Pine expansion, and theAlnus‐rise. On Deeside, Pine‐Birch forests appear to have been established before the main expansion of Alder, which occurs on Upper Deeside in the period following 6700 B.P. On Speyside, evidence is conflicting, suggesting either that the arrival of Pine and Alder took place almost synchronously about 7000 B.P., or that, as on Deeside, Pine‐Birch forest establishment preceded the mainAlnus‐rise, dated at Loch Garten at about 5900 B.P. In addition, the rate of immigration of Pine recorded at silcs of close proximily appears to vary quite markedly.Evidence from two further Speyside diagrams confirms the second view, and also shows that a gradual expansion ofPinusvalues took place during the period 8000‐6600 B.P., with theAlnus‐risc delayed until 5500 B.P. Discrepancies in the records of Early and Middle‐Flandrian pollen zones from site to site are then explained in terms of differential accumulation rates, and the theory that the phase of expansion of the Pine in the Eastern Highlands took place during a period of low or falli

ISSN:0300-9483    

DOI:10.1111/j.1502-3885.1975.tb00689.x

出版商:Blackwell Publishing Ltd    

年代:1975

数据来源: WILEY

摘要:

Geological sections from gravel pits and coastal cliffs at Hindsholm, Funen, Denmark are described. By combining information from these sections at least three kineto‐stratigraphic drift units can he demonstrated. The oldest unit is represented by glacial drift and structures which are the result of an ice sheet moving from NE. The intermediate unit consists of glacial drift and structures formed by a movement from SW. The youngest unit is associated with a glacial movement from SSE. This last movement drumlinized preexisting kames and dislocated earlier glacial drifts. Younger kames and real drumlins were also formed at this stage. A stationary ice margin along the line Skoven ‐ Fyns Hoved ‐ Røsnas is pr

ISSN:0300-9483    

DOI:10.1111/j.1502-3885.1975.tb00690.x

出版商:Blackwell Publishing Ltd    

年代:1975

数据来源: WILEY

摘要:

An attempt is made to analyse the differences in characteristics and interrelations of drumlin fields in twelve areas in northern Central Europe. Measurements of size, shape, orientation, and distribution of drumlins have been made, using 1:25,000 topographic maps with contour patterns at 1.25 m intervals. Four groups are suggested according to the mean size of drumlins. A classilkation of drumlin shape is suggested according to the width‐length ratio. Average drumlins are either elongated or ventricular. Variation of the drumlin orientation possibly indicates the complexity of the ice movement. The distribution of drumlins is examined by using nearest‐neighbour analysis. Significance of the differences between drumlin fields is determined by using analysis of variance. Four different groups of drumlin fields arc suggested by using cluster analysis. The method proved suitable for a systematic analysis of geographical features in the landscapes of this t

ISSN:0300-9483    

DOI:10.1111/j.1502-3885.1975.tb00691.x

出版商:Blackwell Publishing Ltd    

年代:1975

数据来源: WILEY