Peat development, sand cones and palaeohydrogeology of a spring-fed mire in East Yorkshire, UK

Younger, Paul L.; McHugh, Molly

doi:10.1177/095968369500500107

Cited by 5 publications

(2 citation statements)

References 26 publications

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“…Periglacial processes have also contributed significantly to the hydraulic conductivity structure of the upper layers of the Chalk during the Quaternary (Gray 1952, Higginbottom and Fookes 1971, Younger and McHugh 1995, Salmon et al 1996. This dominantly involved freeze-thaw processes that can produce a zone of highly fractured and hence highly permeable chalk, sometimes down to several tens of metres below the palaeosurface, but can also result in completely degraded 'putty chalk' which has low permeability.…”

Section: Introductionmentioning

confidence: 99%

Well flow and dilution measurements for characterization of vertical hydraulic conductivity structure of a carbonate aquifer

Parker

West

Odling

2018

QJEGH

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Section: Introductionmentioning

confidence: 99%

Well flow and dilution measurements for characterization of vertical hydraulic conductivity structure of a carbonate aquifer

Parker

West

Odling

2018

QJEGH

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“…These deposits may be much more common than is generally realised (OWEN et al 2008, 190). Nevertheless, with the exception of the sand cones formed where upwelling groundwater sorts overlying unconsolidated sediments (GUHMAN & PEDERSON 1992, YOUNGER & McHUGH 1995, the depositional products of clastic sediment discharge from springs remain largely uninvestigated.…”

Section: Clastic Spring Sedimentsmentioning

confidence: 99%

Clastic spring sediments: a tool for palaeoflood reconstruction?

Gale¹,

Penny²

2012

zfg

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Clastic spring sediments, the product of groundwater transport by fissure or conduit flow, remain largely uninvestigated. Yet such sediments may be much more common than has generally been realised and examples within the stratigraphic record are likely to have been widely overlooked. This study investigates the potential of these deposits for preserving a history of past floods. Clastic spring sediments at Mount McKinlay Spring in the hot, arid Gammon Ranges of northeast South Australia were dated by 14 C analysis. Five samples of pollen grains taken from sediments interpreted on geomorphic grounds as postdating European contact (AD 1843) all yielded dates of AD 1955-1958. These are likely to be the product of sedimentation in March 1956 following the greatest single day's rainfall in the instrumental record. This event, with a return period of around 100 years, may have caused the undercutting of the banks of the creek downstream of the springs, the collapse of mature River Red Gums growing adjacent to the channel and the accumulation of a jam of logs across the creek. The spring deposits appear to represent solely the product of high-magnitude, long return-period floods. A series of older spring sediments at the site dating from the first millennium BC to the mid-18th century may therefore provide an opportunity to establish event magnitude and frequency, to determine return periods, and to assess the role of climatic change and human environmental impact on flood frequency. This approach may offer a valuable means of reconstructing the chronology of floods, particularly in locations affording few other sources of palaeoenvironmental information.

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Evolution of groundwater systems at the European coastline

Edmunds

Hinsby

Marlin

et al. 2001

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An overview is given of the status and origin of fresh and saline groundwaters in the sedimentary aquifers at or near the present European coastline. Results are presented as six regional maps summarizing, as far as possible, the conditions likely to have existed at the end of the Pleistocene, after the impact of glaciation, when groundwaters might be expected to have reached their maximum offshore evolution prior to the encroachment of sea water during the Holocene marine transgression. In the eastern Baltic, the groundwater evolution was different to other European regions in that freshwater heads were higher than the present day, promoting recharge during much of the Late Pleistocene. Near the North Sea coasts, there is generally evidence of freshwater movement to depths of 100–150 m but the absence of deeper freshwater (palaeowater) storage may relate to the low hydraulic gradients in the North Sea Basin. In the southeastern part of the North Sea brackish palaeowater is found between Tertiary marine sediments c. 300 m below the island of Rømø, 10 km off the Danish west coast. Freshwater of Pleistocene and Holocene ages is found in aquifers at the English Channel coast in several areas, to depths in excess of −300 m; offshore flow in the Late Pleistocene took place towards the central palaeovalley and some of this groundwater may be preserved off the present coastline. In the two Atlantic coastal areas of France and Portugal-Spain a contrast exists due to the proximity of the continental margin and different hydraulic gradients. In Portugal, freshwaters are found at the coastline, and probably offshore, that contain evidence of recharge during the lowered sea levels. In most of the southwestern Atlantic coast of Spain, fresh recent groundwater discharges along and beyond the coastline, while in the old estuary of the Guadalquivir River, saline Holocene water still encroaches the sediments. On the Mediterranean coast of France and Spain some salinity encroachment took place during sea-level rise. In most of the Spanish aquifers fresh recent groundwater has substituted for palaeowater, except for the low-lying areas (Ebro Delta, Inca-Sa Pobla Plain) where brackish Holocene water is still present.

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Peat development, sand cones and palaeohydrogeology of a spring-fed mire in East Yorkshire, UK

Cited by 5 publications

References 26 publications

Well flow and dilution measurements for characterization of vertical hydraulic conductivity structure of a carbonate aquifer

Well flow and dilution measurements for characterization of vertical hydraulic conductivity structure of a carbonate aquifer

Clastic spring sediments: a tool for palaeoflood reconstruction?

Evolution of groundwater systems at the European coastline

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