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Dates from drowned mid-Holocene landscapes on the central western Irish seaboard 来自爱尔兰中西部海岸的全新世中期淹没景观
Irish Journal of Earth Sciences Pub Date : 2022-01-07 DOI: 10.1353/ijes.2019.0011
D. Williams, Eamon Doyle
{"title":"Dates from drowned mid-Holocene landscapes on the central western Irish seaboard","authors":"D. Williams, Eamon Doyle","doi":"10.1353/ijes.2019.0011","DOIUrl":"https://doi.org/10.1353/ijes.2019.0011","url":null,"abstract":"Abstract:The Holocene in Ireland was a time of rapidly rising sea level that continued up to about 5000 years ago. This transgression lead to the flooding of mid-Holocene forested landscapes along the western seaboard of the country. Carbon 14 dating of in situ tree stumps set in peat from these forests shows a span of dates from approximately 7400 to 5200 years cal. BP from counties Mayo, Galway and Clare. Peat deposits of up to 2m thickness formed during this time. These dates firstly show that these forests were long-lived features of the Irish landscape. Secondly their presence suggests that at this time sea level was probably lower than that suggested in glacial rebound models for the area. Thirdly the general absence in these peats of evidence of marine incursion confirms that the Holocene highstand did not occur along the central part of the western Irish seaboard, unlike in areas along the north and east coasts of the country.","PeriodicalId":35911,"journal":{"name":"Irish Journal of Earth Sciences","volume":" ","pages":"-"},"PeriodicalIF":0.0,"publicationDate":"2022-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45573269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Morphology and sedimentology of the Rooskagh Esker, Co. Roscommon 罗斯康姆地区的形态与沉积学
Irish Journal of Earth Sciences Pub Date : 2022-01-07 DOI: 10.3318/IRISJEARTSCIE.2019.05
C. Delaney
{"title":"Morphology and sedimentology of the Rooskagh Esker, Co. Roscommon","authors":"C. Delaney","doi":"10.3318/IRISJEARTSCIE.2019.05","DOIUrl":"https://doi.org/10.3318/IRISJEARTSCIE.2019.05","url":null,"abstract":"Abstract:Morphological and sedimentological investigations of the Rooskagh Esker, Co. Roscommon, indicate that there is a link between esker morphology and depositional environment. Sharp-crested ridges are underlain by glaciofluvial sediments laid down in subglacial tunnels and unroofed channels. Flat-topped segments are deltas, while fan-shaped areas are underlain by subaqueous outwash fans. Variation in morphology indicates that the esker is formed from repeated tunnel-to-ice-margin sections and is time-transgressive, indicating that the ice-marginal zone was characterised by stagnation zone retreat northward. The ice margin terminated in a proglacial lake.","PeriodicalId":35911,"journal":{"name":"Irish Journal of Earth Sciences","volume":" ","pages":"-"},"PeriodicalIF":0.0,"publicationDate":"2022-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43882455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
The development of a sea-level database for Ireland 爱尔兰海平面数据库的开发
Irish Journal of Earth Sciences Pub Date : 2022-01-07 DOI: 10.1353/ijes.2019.0009
A. Brooks, R. Edwards
{"title":"The development of a sea-level database for Ireland","authors":"A. Brooks, R. Edwards","doi":"10.1353/ijes.2019.0009","DOIUrl":"https://doi.org/10.1353/ijes.2019.0009","url":null,"abstract":"Abstract:Despite a corpus of qualitative relative sea-level (RSL) data from Ireland, there exists a comparative paucity of precise and reliable information concerning changes since the Last Glacial Maximum (LGM). Much of the existing data are disparate in nature, having been produced by a range of studies employing different methodologies and often not specifically concerned with sea-level reconstruction. Consequently, there are large spatial and temporal gaps in our understanding of RSL changes, whilst other data are ambiguous and prone to misinterpretation. This paper presents a new database of sea-level information extracted from existing publications. Data are screened and classified into one of four groups according to their utility as indicators of RSL change. This objective classification, based upon well-established sea-level methodology, permits researchers to readily identify the most reliable trends in the available information, and helps to discriminate potentially erroneous data. The database is freely available on-line and should prove a valuable resource to researchers working in coastal environments around Ireland. It will be updated as new information becomes available, ensuring maximum value is extracted from the collection of new sea-level data and highlighting areas where more work is urgently needed.","PeriodicalId":35911,"journal":{"name":"Irish Journal of Earth Sciences","volume":" ","pages":"-"},"PeriodicalIF":0.0,"publicationDate":"2022-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42119978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Irish Pleistocene biostratigraphy 爱尔兰更新世生物地层学
Irish Journal of Earth Sciences Pub Date : 2022-01-07 DOI: 10.3318/irisjeartscie.2019.02
P. Coxon
{"title":"Irish Pleistocene biostratigraphy","authors":"P. Coxon","doi":"10.3318/irisjeartscie.2019.02","DOIUrl":"https://doi.org/10.3318/irisjeartscie.2019.02","url":null,"abstract":"Abstract:An appraisal of published and unpublished Pleistocene biostratigraphical information allows a critical update of the framework of the Irish Quaternary to be presented in the form of a table. Details are presented of Early and Middle Pleistocene temperate stages, as well as new information on a possible last interglacial (Eemian) site in Wexford. The Irish sequence is compared with that of neighbouring continental Europe and with the global record of marine oxygen isotope stages. The Gortian Interglacial is reviewed, and the known sites are listed together with their biostratigraphical ranges. The biostratigraphy of the Midlandian Glaciation, about which we now have far more information, is also discussed along with details, including a pollen diagram, of the recently dated Early Midlandian deposits between Spa and Fenit at Kilfenora, County Kerry.","PeriodicalId":35911,"journal":{"name":"Irish Journal of Earth Sciences","volume":" ","pages":"-"},"PeriodicalIF":0.0,"publicationDate":"2022-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43539433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Ice readvance from the southern Sperrin Mountains during the last deglaciation 最后一次消冰期，斯珀林山脉南部的冰推进
Irish Journal of Earth Sciences Pub Date : 2022-01-07 DOI: 10.3318/irisjeartscie.2019.01
J. Knight
{"title":"Ice readvance from the southern Sperrin Mountains during the last deglaciation","authors":"J. Knight","doi":"10.3318/irisjeartscie.2019.01","DOIUrl":"https://doi.org/10.3318/irisjeartscie.2019.01","url":null,"abstract":"Abstract:Sedimentary exposures near Mullaghcarn in the southern Sperrin Mountains, north-central Ireland, overlie planated bedrock platforms and comprise interbedded sequences of bedrock-derived diamictic breccias, rock rafts and glaciotectonic shears. At Murrinmaguiggan, bedrock rafts are located between glacial outwash sediments that were deposited alternately from Sperrin ice to the north and Omagh Basin ice to the south-west. Flow indicators, including erratic carriage and the dip direction of rock rafts, glaciotectonic shears and outwash sediments, show that Sperrin ice advanced from north to south into terrain that had been vacated by Omagh Basin ice, which then readvanced following Sperrin ice retreat. This geomorphic and sedimentary evidence suggests that Sperrin ice was active during early deglacial stages and that oscillations of its ice margin were not synchronous with oscillations of Omagh Basin ice. Changes in climate and ice mass balance may have controlled ice mass activity.","PeriodicalId":35911,"journal":{"name":"Irish Journal of Earth Sciences","volume":" ","pages":"-"},"PeriodicalIF":0.0,"publicationDate":"2022-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47840090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Notes on an interglacial deposit in Ballykeerogemore Townland and an interstadial deposit in Battlestown Townland, both in County Wexford 关于Ballykeerogemore Townland的间冰期矿床和Battlestown Townland的间冰期矿床的说明，两者都位于韦克斯福德郡
Irish Journal of Earth Sciences Pub Date : 2022-01-07 DOI: 10.3318/irisjeartscie.2019.03
G. Mitchell, W. Watts
{"title":"Notes on an interglacial deposit in Ballykeerogemore Townland and an interstadial deposit in Battlestown Townland, both in County Wexford","authors":"G. Mitchell, W. Watts","doi":"10.3318/irisjeartscie.2019.03","DOIUrl":"https://doi.org/10.3318/irisjeartscie.2019.03","url":null,"abstract":"Abstract:Ballykeerogemore: 6km south of New Ross, interglacial muds and silts (probably of Gortian age) were disturbed by ice (probably of Munsterian age) which thrust diamicts into them. The disturbed deposits were later partly buried by outwash (glaciofluvial) sands and gravels. Still later there was extensive development of ground-ice in the area, and many arcuate banks formed when the ground-ice melted.Battlestown: 3.5km south-east of Ramsgrange, there is a small enclosed basin in which weakly calcareous diamict (probably of Munsterian age) rests on rock. In the centre of the basin a thin layer of grey, laminated, pyritic, fine-grained material with a low content of organic debris with arctic affinities rests on the diamict. A feeble interstadial is suggested. The debris thins out upwards in a grey sandy clay-mud. Near the surface the material gains a content of small stones, possibly carried in by periglacial activity.","PeriodicalId":35911,"journal":{"name":"Irish Journal of Earth Sciences","volume":" ","pages":"-"},"PeriodicalIF":0.0,"publicationDate":"2022-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42933885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Midlandian cold stage deposits at Loop Head, Southern County Clare 克莱尔郡南部Loop Head的米德兰冷期矿床
Irish Journal of Earth Sciences Pub Date : 2022-01-07 DOI: 10.3318/IRISJEARTSCIE.2019.07
A. E. Richards, M. Waller, O. Bloetjes
{"title":"Midlandian cold stage deposits at Loop Head, Southern County Clare","authors":"A. E. Richards, M. Waller, O. Bloetjes","doi":"10.3318/IRISJEARTSCIE.2019.07","DOIUrl":"https://doi.org/10.3318/IRISJEARTSCIE.2019.07","url":null,"abstract":"Abstract:This paper discusses the nature of two suites of glacigenic sediments exposed at Bridges of Ross, southern County Clare. A lower diamicton suite is thought to have been derived from an ice sheet moving from the north-east and contains a previously unrecorded, organic, stadial deposit. The overlying limestone-rich glacigenic sediments appear to be derived from a later stage of glaciation, emanating from the east. A formal lithostratigraphic scheme is presented that includes two new formations, the Loop Head and Lehinch formations, both of which are likely to be of Midlandian age.","PeriodicalId":35911,"journal":{"name":"Irish Journal of Earth Sciences","volume":" ","pages":"-"},"PeriodicalIF":0.0,"publicationDate":"2022-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47470374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The geology of the Kilbride Peninsula and adjacent areas, County Mayo, and its gignificance for regional geological models 梅奥郡基尔布赖德半岛及其邻近地区的地质，及其对区域地质模型的重要性
Irish Journal of Earth Sciences Pub Date : 2022-01-07 DOI: 10.3318/ijes.2021.39.3
J. R. Graham, M. Badley
{"title":"The geology of the Kilbride Peninsula and adjacent areas, County Mayo, and its gignificance for regional geological models","authors":"J. R. Graham, M. Badley","doi":"10.3318/ijes.2021.39.3","DOIUrl":"https://doi.org/10.3318/ijes.2021.39.3","url":null,"abstract":"Abstract:A new geological map and a partly revised lithostratigraphy are presented for the Kilbride Peninsula and the area immediately to the north in County Mayo in the west of Ireland. Volcanic arc rocks of the Lough Nafooey Group are unconformably overlain by late Floian mudrocks that were deposited after the cessation of volcanic activity and which did not receive any detritus from the Lough Nafooey arc. The unconformably overlying Darriwillian Rosroe Formation is similar in character to areas immediately to the west and north-east and shows a coarsening upward pattern. A south dipping Silurian succession everywhere masks the contact between the Lough Nafooey Group and the metamorphic rocks of Connemara. The Silurian succession shows progressive deepening from terrestrial sediments at the base to deep-water turbidites in the youngest strata seen. There are also important provenance changes throughout the Silurian succession. A widespread alkaline lava near the base is the only thick volcanic horizon seen in the succession. The structural geometry suggests that two large fault features (the Doon Rock and Clonbur faults) acted as a linked system during sedimentation and may have produced a point source for a clastic sediment fan of latest Ordovician or early Silurian age. This feature, termed the Derryveeny fan, contains coarse-grained metamorphic detritus from erosion of Connemara further to the south. A marked strike swing of the Silurian strata is attributed to post-Wenlock SSE directed contraction with reverse reactivation of the Derry Bay and Lettereeneen faults and associated deformation of their respective footwalls.This is an open access article under the terms of the Creative Commons attribution license, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. Open Access funding provided by IReL.","PeriodicalId":35911,"journal":{"name":"Irish Journal of Earth Sciences","volume":"39 1","pages":"47 - 70"},"PeriodicalIF":0.0,"publicationDate":"2022-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41763918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The last glaciation of Aran Island and Cruit Island, Co. Donegal, north-west Ireland 爱尔兰西北部多尼戈尔郡阿兰岛和克鲁特岛的最后一次冰川作用
Irish Journal of Earth Sciences Pub Date : 2022-01-07 DOI: 10.1353/ijes.2019.0005
J. Knight
{"title":"The last glaciation of Aran Island and Cruit Island, Co. Donegal, north-west Ireland","authors":"J. Knight","doi":"10.1353/ijes.2019.0005","DOIUrl":"https://doi.org/10.1353/ijes.2019.0005","url":null,"abstract":"Abstract:This paper describes geomorphological and sedimentary evidence from Aran Island and Cruit Island (County Donegal, north-west Ireland), informed by evidence from across west Donegal, which helps to show the processes of ice advance and retreat and subglacial conditions during the last (late Midlandian) glaciation. Extensive abraded rock surfaces show clear evidence for ice overtopping of the islands. Erosional landforms include striae, flutes developed in bedrock, whalebacks, roches mountonnées and meltwater channels. Depositional landforms include erratic boulders and a single marginal moraine on Aran Island. Glacial or glacially-influenced sediment deposition that does not have a geomorphic expression took place into bedrock hollows during an ice advance stage, probably around the time of the last glacial maximum. The dominance of erosional signatures likely reflects the stripping by ice of a surficial cover of weathered pre-glacial granite debris. The general absence of subglacial and ice-marginal sediments across the region likely reflects the granite substrate and coarse granitic weathering products, which did not favour development of a thick deformable sediment pile.","PeriodicalId":35911,"journal":{"name":"Irish Journal of Earth Sciences","volume":" ","pages":"-"},"PeriodicalIF":0.0,"publicationDate":"2022-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45821530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A special compilation of papers on the Quaternary of Ireland published in Irish Journal of Earth Sciences 在爱尔兰地球科学杂志上发表的关于爱尔兰第四纪的特别论文汇编
Irish Journal of Earth Sciences Pub Date : 2022-01-07 DOI: 10.3318/IRISJEARTSCIE.2019.00
P. W. Jackson, M. Parkes, J. Murray
{"title":"A special compilation of papers on the Quaternary of Ireland published in Irish Journal of Earth Sciences","authors":"P. W. Jackson, M. Parkes, J. Murray","doi":"10.3318/IRISJEARTSCIE.2019.00","DOIUrl":"https://doi.org/10.3318/IRISJEARTSCIE.2019.00","url":null,"abstract":"","PeriodicalId":35911,"journal":{"name":"Irish Journal of Earth Sciences","volume":"39 5","pages":"-"},"PeriodicalIF":0.0,"publicationDate":"2022-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41304645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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