| Title | Preliminary diatom analysis of selected samples from Lake Abitibi and Glacial Lake Ojibway, Ontario and Quebec |
| Download | Download (whole publication) |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Prévost, C L; Veillette, J J ; Hamilton, P B |
| Source | Canadian Shield/Bouclier canadien; by Geological Survey of Canada; Geological Survey of Canada, Current Research no. 1995-C, 1995 p. 235-242, https://doi.org/10.4095/202922  Open Access |
| Year | 1995 |
| Publisher | Natural Resources Canada |
| Document | serial |
| Lang. | English; French |
| Media | paper; on-line; digital |
| Related | This publication is contained in Canadian Shield
|
| File format | pdf |
| Province | Ontario; Quebec |
| NTS | 32D/11; 32D/12; 32D/13; 32D/14; 42A/09; 42A/16 |
| Area | Lake Abitibi |
| Lat/Long WENS | -80.5000 -79.0000 49.0000 48.5000 |
| Subjects | paleontology; cores; diatoms; paleoecology; clays; tills; depositional environment; sediments; paleobotany; fossil algae; fossils; Glacial Lake Ojibway; Quaternary |
| Illustrations | sketch maps |
| Released | 1995 01 01 |
| Abstract | In August 1993, fourteen long cores were collected from various parts of Lake Abitibi in order to identify and date the transition periods between Glacial Lake Ojibway, ancestral Lake Abitibi, and
modern Lake Abitibi. Ongoing geochemical, pedological, and paleoecological studies are conducted to find traces of extreme lake-level fluctuations and dry lake bed conditions in postglacial time. Diatom (algae) analysis is one paleoecological method
used. Preliminary results from 8 samples of Lake Ojibway varved clay and Cochrane till reveal that the diatom flora of Glacial Lake Ojibway was poor, since only 15 diatom species from 8 genera were identified. This low number is likely the result of
several factors (turbidity, high rates of sedimentation, lack of nutrients, icebergs) that created poor growing conditions in the cold paleowaters and hampered the successful development of diatom communities. The diatom flora of Lake Abitibi is much
more developed: 149 species from 39 genera were identified in modern surficial material from the top of 14 cores. This preliminary study indicates that diatom analyses can successfully be used to help characterize the sedimentary transition from
Glacial Lake Ojibway to Lake Abitibi. |
| GEOSCAN ID | 202922 |
|
|