Glacial history of Northeastern Ontario II. The Timiskaming–Algoma area

1968 ◽  
Vol 5 (1) ◽  
pp. 97-109 ◽  
Author(s):  
A. N. Boissonneau
Keyword(s):  
Lake Superior ◽  
Great Lakes Basin ◽  
Upper Peninsula ◽  
North Shore ◽  
The North ◽  
Sequence Of Events ◽  
Glacial Chronology ◽  
History Of ◽  
Surficial Deposits ◽  
Upper Peninsula Of Michigan

The surficial deposits, ice movements, and glacial lakes within an area of 34 500 square miles in northeastern Ontario are described. Some of the moraines of the study are tentatively correlated with moraines to the west in the upper peninsula of Michigan, in the Nipigon area, and along the north shore of Lake Superior. The glaciolacustrine deposits and sequence of events in the study area in relation to the glacial features and chronology of the southern Great Lakes basin provide a basis for a partial glacial chronology for the study area. A knowledge of the glacial features of this area further elucidates the integration of movements of two advancing ice lobes, which was observed in northwestern Quebec.

Water in the Wilderness: The Group of Seven and the Coastal Identity of Lake Superior

2021 ◽  
pp. e20200049
Author(s):  
Isabelle Gapp
Keyword(s):  
Environmental History ◽  
Lake Superior ◽  
Indigenous Communities ◽  
Coastal Lake ◽  
Group Of Seven ◽  
North Shore ◽  
The North ◽  
The People ◽  
Coastal Landscapes ◽  
History Of

This paper challenges the wilderness ideology with which the Group of Seven’s coastal landscapes of the north shore of Lake Superior are often associated. Focusing my analysis around key works by Lawren Harris, A.Y. Jackson, J.E.H. MacDonald, and Franklin Carmichael, I offer an alternative perspective on commonly-adopted national and wilderness narratives, and instead consider these works in line with an emergent ecocritical consciousness. While a conversation about wilderness in relation to the Group of Seven often ignores the colonial history and Indigenous communities that previously inhabited coastal Lake Superior, this paper identifies these within a discussion of the environmental history of the region. That the environment of the north shore of Lake Superior was a primordial space waiting to be discovered and conquered only seeks to ratify the landscape as a colonial space. Instead, by engaging with the ecological complexities and environmental aesthetics of Lake Superior and its surrounding shoreline, I challenge this colonial and ideological construct of the wilderness, accounting for the prevailing fur trade, fishing, and lumber industries that dominated during the nineteenth and early twentieth centuries. A discussion of environmental history and landscape painting further allows for a consideration of both the exploitation and preservation of nature over the course of the twentieth century, and looks beyond the theosophical and mystical in relation to the Group’s Lake Superior works. As such, the timeliness of an ecocritical perspective on the Group of Seven’s landscapes represents an opportunity to consider how we might recontextualize these paintings in a time of unprecedented anthropogenic climate change, while recognizing the people and history to whom this land traditionally belongs.

Significance of Organic Detritus in the Diet of Larval Lampreys in the Great Lakes Basin

1994 ◽  
Vol 51 (11) ◽  
pp. 2380-2387 ◽  
Author(s):  
Trent M. Sutton ◽  
Stephen H. Bowen
Keyword(s):  
Great Lakes ◽  
Feeding Rate ◽  
Assimilation Efficiency ◽  
Dry Mass ◽  
Great Lakes Basin ◽  
Organic Detritus ◽  
Upper Peninsula ◽  
Sea Lampreys ◽  
Gut Fullness ◽  
Upper Peninsula Of Michigan

Larval sea lamprey (Petromyzon marinus) and northern brook lamprey (Ichthyomyzon fossor) were collected monthly from three streams in the Upper Peninsula of Michigan from May 1992 through May 1993 and larval sea lampreys were collected during summer months from sites throughout the Great Lakes basin. Organic detritus made up most of the diet ash-free-dry-mass (AFDM) throughout the year, averaging 97.79%, with algae (2.12%) and bacteria (0.09%) making up the remainder of the diet AFDM. Assimilation efficiency for AFDM averaged 72% during warmer months and 53% during cooler months (annual mean = 61%). Gut fullness (amount of AFDM in the anterior one-tenth of the intestine) was low (mean = 0.10 mg diet AFDM∙g−1 ammocoete). There were no significant differences in these measures between ammocoetes collected from the Upper Peninsula and those collected throughout the Great Lakes basin. From a laboratory-determined relationship between gut fullness and feeding rate, feeding rate in the field was estimated to be extremely slow, ranging from 4.2 to 5.5 mg diet AFDM∙g−1 ammocoete∙d−1. These observations indicate that larval lampreys efficiently utilize a diet of organic detritus during warmer months when stream temperatures and food quality are more favorable for feeding, digestion, and growth.

scholarly journals Climate change and angling behavior on the North shore of Lake Superior (USA)

2020 ◽  
Vol 231 ◽  
pp. 105717
Author(s):  
Adam Hestetune ◽  
Paul M. Jakus ◽  
Christopher Monz ◽  
Jordan W. Smith
Keyword(s):  
Climate Change ◽  
Lake Superior ◽  
North Shore ◽  
The North

Quartz deformation in the Marquette and Republic troughs, Upper Peninsula of Michigan

1984 ◽  
Vol 21 (7) ◽  
pp. 793-801 ◽  
Author(s):  
Janet Kappmeyer ◽  
David V. Wiltschko
Keyword(s):  
Subgrain Size ◽  
Stress Regime ◽  
Upper Peninsula ◽  
Metamorphic History ◽  
Dislocation Densities ◽  
History Of ◽  
Peak Metamorphism ◽  
Quartz Fabrics ◽  
Upper Peninsula Of Michigan ◽  
Northern Michigan

Quartz fabrics and microstructures in quartzites of the Mesnard and Goodrich formations were examined to better define the deformation and metamorphic history of the Marquette Synclinorium, northern Michigan. Fabric development is very weak in the whole-rock samples and indicates that mica contamination, extensive annealing, and (or) low imposed strains prevented the formation of distinct c-axis fabrics. However, well defined fabrics are preserved in five quartzite pebbles from the Goodrich conglomerate. Double maxima of varying intensities among these pebbles suggest that the northwest section of the district experienced inhomogeneous shear strain. Measured grain sizes yielded differential stresses ranging from 44 to 548 bar (4.4 to 54.8 MPa). Subgrain size data indicate stresses ranging from 151 to 248 bar (15.1 to 24.8 MPa). Dislocation densities determined by observed etch-pit densities using scanning electron microscopy indicate a range of stresses from 330 to 730 bar (33 to 73 MPa). Stress values from dislocation density measurements vary inversely with metamorphic intensity. Cumulatively, these microstructural data indicate that a low-stress regime of deformation preceded a cooler, higher stress pulse. The data also imply that deformation of the Marquette Synclinorium continued after peak metamorphism, contrary to early hypotheses.

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