O'Connell, Michael (2018): Late-glacial environmental reconstruction at Lough Namackanbeg, Spiddal, Co. Galway, Ireland: pollen and geochemistry [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.895340
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Abstract:
Multiproxy analyses (pollen, geochemistry, whole-core magnetic susceptibility) were carried out on a lake sediment core (pollen spectra from 702-870 cm; 89 spectra; it incl. 10 spectra relating to early Holocene not included in Andrieu et al. 1993) from L. Namackanbeg, a small, now largely infilled lake, 4.6 km north of Spiddal, Connemara. The record spans the Late-glacial and extends into the early Holocene. The local bedrock is granite. Though glaciated in the last glaciation, there is little drift and blanket bog dominates. There is a small semi-natural Atlantic oak woodland in Boliska River valley to the west (Kirby and O'Connell 1982. J Life Sci (RDS) 4: 73-96).
History of investigations
Cored using a Livingstone corer on 12/05/1990 by Michael O'Connell, Karen Molloy, Aage Paus, Peter Readman, and Sjoerd Bohncke and students from the Free University of Amsterdam in connection with EU-funded Late-glacial project (joint NUIG/FU project) in Ireland.
Pollen analysis by Valérie Andrieu in 1991/92.
Pollen spectra from 870-722 cm included in profile NMK IIA as published in Andrieu et al. (1993).
All available spectra (870-702 cm; i.e. 89 spectra) included in PANGAEA submission (06/2018).
Coring in deepest part of basin (in northern part; 25% into the basin from the western side; in same part of basin as NMK I; uncertain of precise location; best estimate for NMK IIA: 53.28524, -9.30071).
A platform was used when coring (swampy surface, a Schwingmoor, with Carex rostrata, etc).
Basal parts of cores (2 parallel cores) retained, i.e. in the case of NMK IIA: 700-800 cm and 800-880.
Detailed notes on stratigraphy available. NMK IIA used for pollen; depths etc here all relate to NMK IIA; NMK IIB - this used for magnetic measurements.
Related to:
Andrieu, Valérie; Huang, Chun Chang; O'Connell, Michael; Paus, Agae A (1993): Lateglacial vegetation and environment in Ireland: First results from four western sites. Quaternary Science Reviews, 12(8), 681-705, https://doi.org/10.1016/0277-3791(93)90007-9
Coverage:
Latitude: 53.285240 * Longitude: -9.300710
Date/Time Start: 1990-05-12T00:00:00 * Date/Time End: 1990-05-12T00:00:00
Event(s):
NMK_IIA (Lough Namackanbeg) * Latitude: 53.285240 * Longitude: -9.300710 * Date/Time: 1990-05-12T00:00:00 * Method/Device: Livingstone corer (LIVC) * Comment: Lake size 180 m x 80 m, lake area 1.2 ha. Lake has largely filled-in since early 20C; now a Schwingmoor; there are effectively 2 small basins; core taken in larger northern basin. Cored from a platform supported by sedge-rich vegetation where probing revealed the thickest sediments. Core taken in 1-m drives
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
5 datasets
Download Data
Datasets listed in this publication series
- O'Connell, M (2018): Age determination profile NMK II, Lough Namackanbeg, Spiddal, Co. Galway. https://doi.org/10.1594/PANGAEA.895323
- O'Connell, M (2018): Geochemistry profile NMK II, Lough Namackanbeg, Spiddal, Co. Galway. https://doi.org/10.1594/PANGAEA.895330
- O'Connell, M (2018): LOI profile NMK II, Lough Namackanbeg, Spiddal, Co. Galway. https://doi.org/10.1594/PANGAEA.895329
- O'Connell, M (2018): Magnetic susceptibility profile NMK II, Lough Namackanbeg, Spiddal, Co. Galway. https://doi.org/10.1594/PANGAEA.895335
- O'Connell, M (2018): Pollen profile NMK II, Lough Namackanbeg, Spiddal, Co. Galway. https://doi.org/10.1594/PANGAEA.895321