Molloy, Karen; O'Connell, Michael (2020): Age determination of profile GLU-IV [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.917974, In: O'Connell, Michael; Molloy, Karen; Jennings, Eneda (2020): Pollen analytical and bog-pine investigations relating to Céide Fields and Garrynagran, Co. Mayo, Ireland [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.911684
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Abstract:
The sampling site was in a small basin-bog (ca. 300 x 100 m). The basin is surrounded by blanket bog that has preserved a pre-peat, extensive stone-wall, regular field system, referred to as Céide Fields.
The research project, part-funded by The Heritage Council (of Ireland), commenced in 1992. The aim was to provide an environmental context for the establishment and use of the prehistoric stone wall field system and also to provide an overall chronological and palaeo-environmental framework.
After establishing the basin contours and the general stratigraphy of the basin using a gouge corer and also taking trial cores for preliminary pollen analysis, the peat core GLU IV (∼5.8 m long; 10 cm diameter) was taken using a Wavin plastic pipe.
The pollen and macrofossil investigations were carried out by Karen Molloy. In all, 77 samples were analysed from 150–574 cm (depths with respect to the bog surface). The pollen profile spans >6800 BC–AD 700, i.e. Boreal to early Medieval period.
LOI and tephra investigations were also carried out. A substantial tephra layer was recorded at 228–232 cm (ca. 600 BC according to the age-depth model). The results of the tephra investigations have yet to be published.
Twenty two conventional 14C dates (Groningen 14C laboratory) were obtained. Twenty of these 14C dates were used to establish the age/depth model that is derived from a fifth order polynomial regression curve obtained using Clam v. 2.2 (details are provided). This is the age/depth model used in the EGQSJ publication (in press, 2019).
Keyword(s):
Related to:
Molloy, Karen; O'Connell, Michael (1995): Palaeoecological investigations towards the reconstruction of environment and land-use changes during prehistory at Céide Fields, western Ireland. Probleme der Küstenforschung im südlichen Nordseegebiet, 23, 187-225
O'Connell, Michael; Molloy, Karen (2001): Farming and woodland dynamics in Ireland during the Neolithic. Biology and Environment-Proceedings of the Royal Irish Academy, 101, 99-128
O'Connell, Michael; Molloy, Karen; Jennings, Eneda (2020): Long-term human impact and environmental change in mid-western Ireland, with particular reference to Céide Fields - an overview. E&G - Quaternary Science Journal, 69(1), 1-32, https://doi.org/10.5194/egqsj-69-1-2020
Other version:
Coverage:
Latitude: 54.300790 * Longitude: -9.442340
Minimum DEPTH, sediment/rock: 1.650 m * Maximum DEPTH, sediment/rock: 5.165 m
Event(s):
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Laboratory code/label | Lab label | O'Connell, Michael | |||
| 2 | Sample code/label | Sample label | O'Connell, Michael | |||
| 3 | Depth, bottom/max | Depth bot | m | O'Connell, Michael | ||
| 4 | Depth, top/min | Depth top | m | O'Connell, Michael | ||
| 5 | DEPTH, sediment/rock | Depth sed | m | O'Connell, Michael | Geocode | |
| 6 | Age, dated | Age dated | ka | O'Connell, Michael | Age, 14C AMS | |
| 7 | Age, dated standard deviation | Age dated std dev | ± | O'Connell, Michael | Age, 14C AMS | 1 s |
| 8 | δ13C, organic carbon | δ13C Corg | ‰ PDB | O'Connell, Michael |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
146 data points
Data
| 1 Lab label | 2 Sample label | 3 Depth bot [m] | 4 Depth top [m] | 5 Depth sed [m] | 6 Age dated [ka] | 7 Age dated std dev [±] | 8 δ13C Corg [‰ PDB] |
|---|---|---|---|---|---|---|---|
| GrN-24963 | GLU IV-22 | 1.660 | 1.640 | 1.650 | 1.570 | 0.050 | |
| GrN-21638 | GLU IV 14 | 1.700 | 1.670 | 1.685 | 1.820 | 0.050 | -28.3 |
| GrN-24962 | GLU IV-21 | 1.720 | 1.710 | 1.715 | 1.680 | 0.040 | |
| GrN-24961 | GLU IV-20 | 1.750 | 1.740 | 1.745 | 1.750 | 0.040 | |
| GrN-24960 | GLU IV-19 | 1.780 | 1.770 | 1.775 | 1.730 | 0.040 | |
| GrN-24959 | GLU IV-18 | 1.820 | 1.810 | 1.815 | 1.850 | 0.060 | |
| GrN-21637 | GLU IV 13 | 1.880 | 1.850 | 1.865 | 1.940 | 0.050 | -29.1 |
| GrN-24958 | GLU IV-17 | 1.900 | 1.890 | 1.895 | 2.000 | 0.070 | |
| GrN-24957 | GLU IV-16 | 2.280 | 2.260 | 2.270 | 2.530 | 0.050 | |
| GrN-24956 | GLU IV-15 | 2.340 | 2.320 | 2.330 | 2.420 | 0.060 | |
| GrN-21636 | GLU IV 12 | 2.580 | 2.550 | 2.565 | 2.890 | 0.050 | -28.0 |
| GrN-21121 | GLU IV 5 | 2.930 | 2.890 | 2.910 | 3.310 | 0.060 | -27.8 |
| GrN-21635 | GLU IV 11 | 3.220 | 3.190 | 3.205 | 3.550 | 0.050 | -27.4 |
| GrN-21120 | GLU IV 4 | 3.550 | 3.510 | 3.530 | 3.890 | 0.060 | -27.0 |
| GrN-21634 | GLU IV 10 | 3.900 | 3.870 | 3.885 | 4.070 | 0.060 | -27.8 |
| GrN-21119 | GLU IV 3 | 4.060 | 4.020 | 4.040 | 4.110 | 0.060 | -28.0 |
| GrN-21633 | GLU IV 9 | 4.440 | 4.400 | 4.420 | 4.470 | 0.060 | -28.1 |
| GrN-21118 | GLU IV 2 | 4.520 | 4.480 | 4.500 | 4.550 | 0.060 | -27.6 |
| GrN-21632 | GLU IV 8 | 4.620 | 4.590 | 4.605 | 4.500 | 0.060 | -26.9 |
| GrN-21117 | GLU IV 1 | 4.900 | 4.860 | 4.880 | 4.840 | 0.060 | -28.2 |
| GrN-21631 | GLU IV 7 | 4.970 | 4.940 | 4.955 | 5.170 | 0.060 | -27.5 |
| GrN-21630 | GLU IV 6 | 5.180 | 5.150 | 5.165 | 5.100 | 0.080 | -28.5 |