Quaternary sequences along the north shore of Lake Ontario: Oshawa – Port Hope

1982 ◽  
Vol 19 (9) ◽  
pp. 1836-1850 ◽  
Author(s):  
M. E. Brookfield ◽  
Q. H. J. Gwyn ◽  
I. P. Martin
Keyword(s):  
Lake Ontario ◽  
Glacial Lake ◽  
Geological History ◽  
North Shore ◽  
The North ◽  
Quaternary Sequences

We describe six major stratigraphic units from the hitherto neglected Quaternary sequences along the north shore of Lake Ontario between Oshawa and Port Hope. These units, from the base upwards, consist of the following: a lowermost unit of silt till, apparently overlying bedrock; a complex unit of lacustrine and glaciofluvial sediments with several thin silt tills, usually unconformable on the lowermost unit; a glaciofluvial sand unit, filling valleys cut into the underlying units; a unit of two sandy pebbly tills; a silt till; and varved clays and sands of glacial Lake Iroquois.Though the sections show more erosional intervals, the above units can be correlated with the better known Scarborough sections as follows: the lowest unit with the Sunnybrook Till; the overlying complex unit with the Meadowcliffe Till and associated sediments; the two sandy pebbly tills with the lower Leaside Till; and the overlying silt till with the Halton Till.The inferred geological history is similar to that of the Scarborough area.

Conflict, Population Movement, and Microscale Social Networks in Northern Iroquoian Archaeology

2021 ◽  
Vol 86 (2) ◽  
pp. 350-367
Author(s):  
Jennifer Birch ◽  
John P. Hart
Keyword(s):  
Social Networks ◽  
Sixteenth Century ◽  
Lake Ontario ◽  
Population Movement ◽  
Network Ties ◽  
The West ◽  
Local Networks ◽  
North Shore ◽  
The North ◽  
Specific Sequences

We employ social network analysis of collar decoration on Iroquoian vessels to conduct a multiscalar analysis of signaling practices among ancestral Huron-Wendat communities on the north shore of Lake Ontario. Our analysis focuses on the microscale of the West Duffins Creek community relocation sequence as well as the mesoscale, incorporating several populations to the west. The data demonstrate that network ties were stronger among populations in adjacent drainages as opposed to within drainage-specific sequences, providing evidence for west-to-east population movement, especially as conflict between Wendat and Haudenosaunee populations escalated in the sixteenth century. These results suggest that although coalescence may have initially involved the incorporation of peoples from microscale (local) networks, populations originating among wider mesoscale (subregional) networks contributed to later coalescent communities. These findings challenge previous models of village relocation and settlement aggregation that oversimplified these processes.

Some problems of late Wisconsin history and geochronology in southeastern Ontario

1980 ◽  
Vol 17 (3) ◽  
pp. 361-381 ◽  
Author(s):  
J. Terasmae
Keyword(s):  
Lake Ontario ◽  
Lake Huron ◽  
Glacial Lake ◽  
Radiocarbon Dates ◽  
Ottawa River ◽  
Bay Area ◽  
The North ◽  
Lake Algonquin ◽  
Surficial Deposits ◽  
Glacial Lake Algonquin

Palynological studies and radiocarbon dating of sediments from about 20 lakes and bogs in southeastern Ontario have been used to establish a palynostratigraphic sequence of six pollen zones extending to approximately 12 000 years BP and indicating that deglaciation occurred between 12 500 and 11 500 years BP, probably during the Two Creeks interstadial interval.The glacial Lake Iroquois existed in the Lake Ontario basin from about 12 500 – 11 800 years BP while the Lake Ontario ice lobe was retreating northeastward, and the Kirkfield – Fenelon Falls outlet from glacial Lake Algonquin (in the Georgian Bay – Lake Huron basin) to Lake Iroquois opened about 12 000 years ago when the Dummer Moraine was deposited as a stagnant ice disintegration feature south of the Algonquin and Haliburton Highlands.Most radiocarbon dates (about 25) on marine shells, whale bone, and algae from Champlain Sea beach deposits are in the range of 10 000 – 11 800 years BP, indicating that the Champlain Sea episode is younger than glacial Lake Iroquois. However, a few Champlain Sea dates are older than 12 000 years BP and present an unresolved problem in geochronological correlation because they conflict with proposed deglaciation histories for southeastern Ontario.Late Wisconsin ice marginal positions are poorly known in southeastern Ontario and comprise another problem for further study.The end of glacial Lake Algonquin phase (the main drainage event in the North Bay area) probably occurred between 10 800 and 10 500 years BP, after the Champlain Sea had reached its maximum western limit in the Pembroke area (upper Ottawa River valley) as indicated by stratigraphic relationships of surficial deposits.

Priority Site Selection for Degraded Areas Based on Microbial and Toxicant Screening Tests

1986 ◽  
Vol 21 (2) ◽  
pp. 267-282 ◽  
Author(s):  
B.J. Dutka ◽  
K. Walsh ◽  
K.K. Kwan ◽  
A. El-Shaarawi ◽  
D.L. Liu ◽  
...  
Keyword(s):  
Site Selection ◽  
Microbial Population ◽  
Lake Ontario ◽  
Screening Tests ◽  
Test Procedures ◽  
Niagara River ◽  
North Shore ◽  
The North ◽  
Selection For ◽  
Humber River

Abstract The results of a study to evaluate the suitability of a variety of microbiological, biochemical and bioassay tests to become part of a battery of test procedures to identify degraded or degrading water bodies, are presented. Data for this study were obtained from 51 inshore sampling sites along the north shore of Lake Ontario from Kingston to Niagara River. Data examination indicated that microbial population, biochemical or bioassay tests performed independently do not provide realistic estimates of priority concern areas and that the battery approach is required. From this study the sampling sites of highest concern were: Humber River STP out fall, mouth of Mimico Creek, mouth of Credit River and Bay of Quinte near the Belleville STP outfall.

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