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Lenz, Kai-Frederik; Gebhardt, Catalina; Lajeunesse, Patrick; Lohrberg, Arne; Gross, Felix; Krastel, Sebastian (2023): High-resolution multichannel seismic profiles from Lake Manicouagan, Canada [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.946132

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Abstract:
Lakes in formerly glaciated regions can provide valuable paleoclimate archives. Lake Manicouagan (Manikuakan, according to Innu toponymy), formed in the basin of the ~214‐Ma Manicouagan impact crater of eastern Québec, is a key area for reconstructing long‐term environmental change, as it was directly affected by the Pleistocene glaciations and the waxing and waning of the Laurentide Ice Sheet. Here, we present high‐resolution seismic data revealing an overdeepened bedrock valley filled with a sedimentary sequence. We assess its potential to serve as a paleoclimate archive. The varying shape of the overdeepened valley indicates complex erosional processes. A lower narrow V‐shaped gorge is indicative of either pressurized subglacial meltwater or pre‐Quaternary fluvial erosion, or a combination of both. Three scenarios are discussed regarding deposition of the sedimentary sequence: deposition only during and after retreat of the last glacial episode; (ii) deposition during multiple glacial–interglacial cycles; and (iii) deposition mainly during a subglacial lake stage. We suggest subglacial followed by proglacial sedimentation as the most probable scenario for deposition of the sedimentary succession. We recommend considering the sediments of Lake Manicouagan as a paleoclimate archive reaching back at least to 7.5 ka, but the lake also probably contains sediments deposited before the last deglacial period. The published data include all thirty high-resolution seismic profiles acquired in 2016.
Keyword(s):
Canada; glacial geomorphology; high-resolution reflection seismic; Lake Manicouagan; Laurentide Ice Sheet; paleoclimate archive; subglacial lake
Supplement to:
Lenz, Kai-Frederik; Gebhardt, Catalina; Lajeunesse, Patrick; Lohrberg, Arne; Gross, Felix; Krastel, Sebastian (2023): Valley morphology and Quaternary seismic stratigraphy of the Manicouagan impact crater lake (Eastern Canada). Journal of Quaternary Science, https://doi.org/10.1002/jqs.3529
Coverage:
Median Latitude: 51.481899 * Median Longitude: -68.340283 * South-bound Latitude: 51.281010 * West-bound Longitude: -68.515270 * North-bound Latitude: 51.635940 * East-bound Longitude: -68.249120
Date/Time Start: 2016-07-16T15:06:38 * Date/Time End: 2016-07-25T12:56:07
Event(s):
AWI-20168110  * Latitude Start: 51.484640 * Longitude Start: -68.322390 * Latitude End: 51.465050 * Longitude End: -68.249120 * Date/Time Start: 2016-07-16T15:06:38 * Date/Time End: 2016-07-16T15:52:38 * Location: Lake Manicouagan * Campaign: Lake_Manic * Basis: Louis-Edmond-Hamelin * Method/Device: Seismic reflection profile (SEISREFL)
AWI-20168120  * Latitude Start: 51.484560 * Longitude Start: -68.322280 * Latitude End: 51.487780 * Longitude End: -68.320580 * Date/Time Start: 2016-07-16T15:52:44 * Date/Time End: 2016-07-16T16:12:20 * Location: Lake Manicouagan * Campaign: Lake_Manic * Basis: Louis-Edmond-Hamelin * Method/Device: Seismic reflection profile (SEISREFL)
AWI-20168130  * Latitude Start: 51.514740 * Longitude Start: -68.344520 * Latitude End: 51.503560 * Longitude End: -68.298220 * Date/Time Start: 2016-07-16T16:15:32 * Date/Time End: 2016-07-16T16:41:44 * Location: Lake Manicouagan * Campaign: Lake_Manic * Basis: Louis-Edmond-Hamelin * Method/Device: Seismic reflection profile (SEISREFL)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1 Event labelEventLenz, Kai-Frederik
2 Date/Time of eventDate/TimeLenz, Kai-Frederik
3 Latitude of eventLatitudeLenz, Kai-Frederik
4 Longitude of eventLongitudeLenz, Kai-Frederik
5 Date/Time of event 2Date/Time 2Lenz, Kai-Frederik
6 Latitude of event 2Latitude 2Lenz, Kai-Frederik
7 Longitude of event 2Longitude 2Lenz, Kai-Frederik
8 Binary ObjectBinaryLenz, Kai-Frederiksgy
9 Binary Object (File Size)Binary (Size)BytesLenz, Kai-Frederiksgy
10 Binary ObjectBinaryLenz, Kai-Frederikuko
11 Binary Object (File Size)Binary (Size)BytesLenz, Kai-Frederikuko
12 Binary ObjectBinaryLenz, Kai-FrederikReadMe
13 Binary Object (File Size)Binary (Size)BytesLenz, Kai-FrederikReadMe
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Basic curation (CurationLevelB)
Size:
90 data points

Data

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1 
Event		2 
Date/Time		3 
Latitude		4 
Longitude		5 
Date/Time 2		6 
Latitude 2		7 
Longitude 2		8 
Binary
(sgy)		9 
Binary (Size) [Bytes]
(sgy)		10 
Binary
(uko)		11 
Binary (Size) [Bytes]
(uko)		12 
Binary
(ReadMe)		13 
Binary (Size) [Bytes]
(ReadMe)
AWI-20168110 2016-07-16T15:06:3851.4846-68.32242016-07-16T15:52:3851.4650-68.2491AWI-20168110.sgy42.5 MBytesAWI-20168110.ukooa89.7 kBytesAWI-20168110_info.txt3.1 kBytes
AWI-20168120 2016-07-16T15:52:4451.4846-68.32232016-07-16T16:12:2051.4878-68.3206AWI-20168120.sgy20.8 MBytesAWI-20168120.ukooa43.9 kBytesAWI-20168120_info.txt3.1 kBytes
AWI-20168130 2016-07-16T16:15:3251.5147-68.34452016-07-16T16:41:4451.5036-68.2982AWI-20168130.sgy25.7 MBytesAWI-20168130.ukooa54.3 kBytesAWI-20168130_info.txt3.1 kBytes
AWI-20168140 2016-07-17T14:31:1551.6243-68.51092016-07-17T15:02:5751.6315-68.4684AWI-20168140.sgy25.1 MBytesAWI-20168140.ukooa53.1 kBytesAWI-20168140_info.txt3.1 kBytes
AWI-20168160 2016-07-17T15:23:2751.6187-68.45872016-07-17T15:42:5151.6358-68.4437AWI-20168160.sgy16.8 MBytesAWI-20168160.ukooa35.5 kBytesAWI-20168160_info.txt3.1 kBytes
AWI-20168170 2016-07-17T15:45:1551.6153-68.44352016-07-17T16:05:5151.6353-68.4416AWI-20168170.sgy16.7 MBytesAWI-20168170.ukooa35.3 kBytesAWI-20168170_info.txt3.1 kBytes
AWI-20168180 2016-07-18T14:35:5251.4515-68.29002016-07-18T14:47:0451.4626-68.2828AWI-20168180.sgy10.2 MBytesAWI-20168180.ukooa21.5 kBytesAWI-20168180_info.txt3.1 kBytes
AWI-20168190 2016-07-18T14:47:1051.4626-68.28282016-07-18T16:20:1051.5549-68.3374AWI-20168190.sgy83.3 MBytesAWI-20168190.ukooa176 kBytesAWI-20168190_info.txt3.1 kBytes
AWI-20168200 2016-07-21T12:08:1151.2889-68.32022016-07-21T13:01:4751.2968-68.3223AWI-20168200.sgy46.7 MBytesAWI-20168200.ukooa98.5 kBytesAWI-20168200_info.txt3.1 kBytes
AWI-20168210 2016-07-21T13:21:4151.2909-68.33492016-07-21T13:53:0051.2811-68.2921AWI-20168210.sgy24.2 MBytesAWI-20168210.ukooa51.1 kBytesAWI-20168210_info.txt3.1 kBytes
AWI-20168220 2016-07-21T13:53:4151.2810-68.29222016-07-21T14:35:1751.3199-68.2837AWI-20168220.sgy32.9 MBytesAWI-20168220.ukooa69.5 kBytesAWI-20168220_info.txt3.1 kBytes
AWI-20168230 2016-07-23T11:08:3651.5479-68.33272016-07-23T11:27:0651.5642-68.3580AWI-20168230.sgy18.8 MBytesAWI-20168230.ukooa39.6 kBytesAWI-20168230_info.txt3.1 kBytes
AWI-20168240 2016-07-23T11:27:1251.5643-68.35792016-07-23T11:52:4851.5960-68.3664AWI-20168240.sgy26.7 MBytesAWI-20168240.ukooa56.3 kBytesAWI-20168240_info.txt3.1 kBytes
AWI-20168270 2016-07-23T21:46:0651.3584-68.25582016-07-23T22:03:1851.3592-68.2892AWI-20168270.sgy17.4 MBytesAWI-20168270.ukooa36.7 kBytesAWI-20168270_info.txt3.1 kBytes
AWI-20168280 2016-07-23T22:27:4851.3847-68.32582016-07-23T22:46:1251.3991-68.2952AWI-20168280.sgy19.8 MBytesAWI-20168280.ukooa41.8 kBytesAWI-20168280_info.txt3.1 kBytes
AWI-20168290 2016-07-24T15:06:0151.6011-68.40232016-07-24T15:23:3751.6223-68.4000AWI-20168290.sgy17.8 MBytesAWI-20168290.ukooa37.6 kBytesAWI-20168290_info.txt3.1 kBytes
AWI-20168300 2016-07-24T15:44:3151.6090-68.36152016-07-24T16:05:1951.5904-68.3880AWI-20168300.sgy20.8 MBytesAWI-20168300.ukooa43.9 kBytesAWI-20168300_info.txt3.1 kBytes
AWI-20168310 2016-07-24T16:18:2551.5733-68.38322016-07-24T16:38:4951.5815-68.3475AWI-20168310.sgy19.8 MBytesAWI-20168310.ukooa41.9 kBytesAWI-20168310_info.txt3.1 kBytes
AWI-20168320 2016-07-24T17:06:1351.5490-68.31782016-07-24T17:21:3151.5412-68.3453AWI-20168320.sgy14.7 MBytesAWI-20168320.ukooa31 kBytesAWI-20168320_info.txt3.1 kBytes
AWI-20168330 2016-07-24T17:44:3051.5092-68.33832016-07-24T18:06:0051.5175-68.3003AWI-20168330.sgy21.1 MBytesAWI-20168330.ukooa44.6 kBytesAWI-20168330_info.txt3.1 kBytes
AWI-20168340 2016-07-25T10:23:3751.4644-68.25282016-07-25T10:50:1351.4554-68.3024AWI-20168340.sgy26.8 MBytesAWI-20168340.ukooa56.6 kBytesAWI-20168340_info.txt3.1 kBytes
AWI-20168350 2016-07-25T11:10:4351.4353-68.32952016-07-25T11:27:0151.4312-68.3003AWI-20168350.sgy15.6 MBytesAWI-20168350.ukooa32.9 kBytesAWI-20168350_info.txt3.1 kBytes
AWI-20168360 2016-07-25T11:45:4351.4470-68.28912016-07-25T11:58:4951.4376-68.3108AWI-20168360.sgy13.8 MBytesAWI-20168360.ukooa29.1 kBytesAWI-20168360_info.txt3.1 kBytes
AWI-20168370 2016-07-25T11:58:5551.4376-68.31082016-07-25T12:10:0151.4230-68.3090AWI-20168370.sgy12.3 MBytesAWI-20168370.ukooa26.1 kBytesAWI-20168370_info.txt3.1 kBytes
AWI-20168380 2016-07-25T12:10:0751.4230-68.30902016-07-25T12:20:4951.4113-68.3184AWI-20168380.sgy11.4 MBytesAWI-20168380.ukooa24 kBytesAWI-20168380_info.txt3.1 kBytes
AWI-20168390 2016-07-25T12:20:5551.4111-68.31832016-07-25T12:44:4351.3831-68.3042AWI-20168390.sgy25.1 MBytesAWI-20168390.ukooa53 kBytesAWI-20168390_info.txt3.1 kBytes
AWI-20168400 2016-07-25T12:44:4951.3831-68.30432016-07-25T12:56:0751.3804-68.2814AWI-20168400.sgy12.2 MBytesAWI-20168400.ukooa25.7 kBytesAWI-20168400_info.txt3.1 kBytes
AWI-20168150 2016-07-17T15:03:0351.6314-68.46842016-07-17T15:19:3951.6179-68.4569AWI20168150.sgy13 MBytesAWI20168150.ukooa27 kBytesAWI20168150_info.txt3.1 kBytes
AWI-20168250 2016-07-23T11:52:5451.5960-68.36652016-07-23T13:13:3051.6359-68.5153AWI20168250.sgy85.5 MBytesAWI20168250.ukooa180.6 kBytesAWI20168250_info.txt3.1 kBytes
AWI-20168260 2016-07-23T20:57:4851.3283-68.28632016-07-23T21:14:4851.3214-68.2560AWI20168260.sgy16.7 MBytesAWI20168260.ukooa34.5 kBytesAWI20168260_info.txt3.1 kBytes