| Title | Linking subglacial meltwater through the eastern Great Lakes, Ontario and New York (at the time of the Atlantic Heinrich 1 event) with a meltwater flood in the Gulf of Mexico about 13.5 ka (16.2 cal
ka) |
| Download | Downloads |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Lewis, C F M ;
Todd, B J |
| Source | Geological Survey of Canada, Open File 8181, 2017, 1 sheet, https://doi.org/10.4095/299649  Open Access |
| Image |  |
| Year | 2017 |
| Publisher | Natural Resources Canada |
| Document | open file |
| Lang. | English |
| Media | on-line; digital |
| File format | pdf |
| Province | Offshore region; Ontario; Quebec |
| NTS | 30; 31; 40; 41 |
| Area | Great Lakes; Lake Ontario; Lake Erie; Long Point; Lake Huron; Gulf of Mexico; Mississippi River; Illinois River; Wabash River; Ohio River; Ottawa; Montreal; New York State; Finger Lakes; Seneca Lake; Cayuga
Lake; Michigan; Grand River; Illinois; Havana; United States of America |
| Lat/Long WENS | -94.0000 -72.0000 46.0000 26.0000 |
| Subjects | surficial geology/geomorphology; marine geology; geophysics; geochronology; paleontology; glacial history; glaciation; Wisconsinian glacial stage; postglacial evolution; glacial lakes; meltwater
channels; flow systems; ice sheets; ice movement directions; erosion; lakes; glacial deposits; glaciolacustrine deposits; glaciomarine deposits; glacial features; tills; till ridges; drumlins; lacustrine deposits; geophysical surveys; seismic
surveys, lake; seismic reflection surveys; bathymetry; seismic profiles; boreholes; fossils; pollen; microfossils; radiometric dating; radiocarbon dating; oxygen isotopes; Laurentide Ice Sheet; Heinrich Event 1; Rochester Basin; Norfolk Moraine;
Pennsylvania Channel; Glacial Lake Maumee; Glacial Lake Arkona; Imlay Channel; Kennett braided channel belt; Foraminifera; Glacial Lake Ypsilanti; data processing; diamicton; multibeam bathymetry; Phanerozoic; Cenozoic; Quaternary |
| Illustrations | location maps; sketch maps; seismic profiles; spectra; graphs; schematic profiles; geophysical images; photographs; biostratigraphic charts |
| Program | Groundwater Geoscience,
Aquifer Assessment & support to mapping |
| Released | 2017 03 21 |
| Summary | (Plain Language Summary, not published)
The events and flows described in this Open File fit a scenario in which Laurentide Ice Sheet instability, associated with the H1 event of iceberg
discharge to the North Atlantic Ocean, facilitated regional subglacial meltwater flows, first southward, then west-southwestward, leading to rapid transport of meltwater through the eastern Great Lake basins, then southward via the Mississippi River
valley to the Gulf of Mexico about 13.6-13.4 (16.4-16.1 cal) ka. The meltwater flows discharged to the Gulf of Mexico where they have been detected by highly negative delta-18O composition of foraminiferal tests. |
| GEOSCAN ID | 299649 |
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