Relevant bibliographies by topics / Laurentian Mountains Region (Quebec)

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Academic literature on the topic 'Laurentian Mountains Region (Quebec)'

Author: Grafiati
Published: 4 June 2021
Last updated: 8 February 2022

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Journal articles on the topic "Laurentian Mountains Region (Quebec)"

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Gerbi, C. C., S. E. Johnson, J. N. Aleinikoff, J. H. Bédard, G. R. Dunning, and C. M. Fanning. "Early Paleozoic development of the Maine-Quebec Boundary Mountains region." Canadian Journal of Earth Sciences 43, no. 3 (March 1, 2006): 367–89. http://dx.doi.org/10.1139/e05-113.

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Pre-Silurian bedrock units played key roles in the early Paleozoic history of the Maine–Quebec Appalachians. These units represent peri-Laurentian material whose collision with the craton deformed the Neoproteozoic passive margin and initiated the Appalachian mountain-building cycle. We present new field, petrological, geochronological, and geochemical data to support the following interpretations related to these units. (1) The Boil Mountain Complex and Jim Pond Formation do not represent part of a coherent ophiolite. (2) Gabbro and tonalite of the Boil Mountain Complex intruded the Chain Lakes massif at ca. 477 Ma. (3) The Skinner pluton, an arc-related granodiorite, intruded the Chain Lakes massif at ca. 472 Ma. (4) The Attean pluton, with a reconfirmed age of ca. 443 Ma, is unrelated to Early Ordovician orogenesis. (5) The most likely timing for the juxtaposition of the Jim Pond Formation and the Boil Mountain Complex was during regional Devonian deformation. These interpretations suggest that the Boundary Mountains were once part of a series of arcs extending at least from central New England through Newfoundland.
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Villeneuve, Normand, Miroslav M. Grandtner, and J. André Fortin. "The coenological organization of ectomycorrhizal macrofungi in the Laurentide Mountains of Quebec." Canadian Journal of Botany 69, no. 10 (October 1, 1991): 2215–24. http://dx.doi.org/10.1139/b91-278.

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Ectomycorrhizal macrofungus communities were classified across a sequence of four forest associations in the Laurentide Mountains. Cluster analysis was used to delimit two types of coenological units: grouping and sociological group. Three macrofungal groupings and two subgroupings, which vary with physiognomic and floristic–edaphic parameters of the forest sites, were delimited. Each of these grouping units is characterized by one of the six delimited sociological groups of fungi that are consecutively replaced following changes in latitude and altitude. When considering the similarity of species composition, Laurentide groupings appear to be isolated from other macrofungal assemblages in North American temperate forests and mainly affected by geographic partitioning of sites and by the physiognomy and type of forest vegetation within a given phytoclimatic region. As seen by the respective richness at the family level, Eurasian and Laurentide communities show similar patterns of zonal distribution, mainly owing to the role of climatic factors. A numerical analysis supported the hypothesis that the edaphic environment, as well as the vascular vegetation, might exert a significant influence on the delimitation and distribution of ectomycorrhizal communities. The interdependence of ectomycorrhizal communities and phytocoenoses at the ecosystem level is discussed. Key words: cluster analysis, community, ectomycorrhiza, macrofungus, macromycete, mycocoenology.
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Desponts, Mireille, André Desrochers, Louis Bélanger, and Jean Huot. "Structure de sapinières aménagées et anciennes du massif des Laurentides (Québec) et diversité des plantes invasculaires." Canadian Journal of Forest Research 32, no. 12 (December 1, 2002): 2077–93. http://dx.doi.org/10.1139/x02-127.

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This study was undertaken to determine the contribution of old-growth and senescent forest stands regenerated through clear-cutting to the biodiversity of wet boreal fir stands in eastern Quebec because overmature stands are becoming scarce in that region. The study area was located in the Laurentian Mountains north of the city of Québec. The structure and composition of nonvascular plant communities (mosses, hepatica, lichens, and saprophytic fungi) of old-growth forests were compared with those of mature or senescent fir stands harvested 60 years ago. Nonvascular plants have a more uniform structure and a lower diversity in mature than in senescent or old-growth forests. A variety of specialized soil- and wood-inhabiting species and many rare species not observed in mature stands regenerated through clear-cutting are found in the latter. Structural diversity of senescent second-growth fir stands becomes similar to that of old-growth stand because of mortality within the overstory. These structural characteristics favour the development of diversified nonvascular plant communities, especially wood-inhabiting species found on slightly decomposed woody debris and soil-inhabiting species that colonize disturbed soils.[Journal translation]
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Cattaneo, Antonella, and Lucie Fortin. "Moss distribution in streams of the Quebec Laurentian Mountains." Canadian Journal of Botany 78, no. 6 (June 1, 2000): 748–52. http://dx.doi.org/10.1139/b00-050.

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To model the distribution of aquatic mosses, we measured their cover in 33 Quebec streams. The variation in moss cover among streams was explained mostly (42%) by substratum size (percentage >25 cm in diameter). Water pH and depth also explained a significant amount of variation (9 and 10%, respectively). Within a stream, moss cover was again positively correlated to the availability of large substrata and negatively to water depth. There was a strong inverse relationship between covers of moss and of the filamentous cyanobacterium Stigonema, suggesting a competitive interaction. This study confirms previous observations that moss distribution is mainly controlled by substratum size. Chemistry explains part of the among-stream variation. Stigonema-moss competition partly accounts for the patchy distribution within a stream.Key words: aquatic mosses, Fontinalis, streams, Quebec.
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Cattaneo, Antonella, and Lucie Fortin. "Moss distribution in streams of the Quebec Laurentian Mountains." Canadian Journal of Botany 78, no. 6 (2000): 748–52. http://dx.doi.org/10.1139/cjb-78-6-748.

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6

Borns, Harold W., and Terence J. Hughes. "The implications of the Pineo Ridge readvance in Maine." Dynamique et paléogéographie de l’inlandsis laurentidien 31, no. 3-4 (January 17, 2011): 203–6. http://dx.doi.org/10.7202/1000272ar.

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Much of the Laurentide ice sheet in Maine, Atlantic Provinces, and southern Quebec was a "marine ice sheet," that is it was grounded below the prevailing sea level. When proper conditions prevailed, calving bays progressed into the ice sheet along ice streams partitioning it, leaving those portions grounded above sea level as residual ice caps. At least by 12,800 yrs. BP a calving bay had progressed up the St. Lawrence Lowland at least to Ottawa while a similar, but less extensive calving bay developed in Central Maine at approximately the same time. Concurrently, ice draining north into the St. Lawrence and south into the Central Maine calving bays rapidly lowered the surface of the intervening ice sheet until it eventually divided over the NE-SW trending Boundary and Longfellow Mountains and probably over other highland areas as well. A major consequence of these nearly simultaneous processes was the separation of an initial large ice cap over part of Maine, New Brunswick, and Québec which was bounded on the west by the calving bay in Central Maine, to the north by the calving bay in the St. Lawrence Lowland, to the south by the Bay of Fundy, and to the east by the Gulf of St. Lawrence. In coastal Maine, east of the calving bay, the margin of the ice cap receded above the marine limit at least 40 km and subsequently read-vanced terminating at Pineo Ridge moraine approximately 12,700 yrs. BP. These events are the stratigraphie and chronologic equivalent of the Cary-Pt. Huron recession/Pt. Huron readvance of the Great Lakes region.
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Castonguay, Sébastien, and Alain Tremblay. "Tectonic evolution and significance of Silurian – Early Devonian hinterland-directed deformation in the internal Humber zone of the southern Quebec Appalachians." Canadian Journal of Earth Sciences 40, no. 2 (February 1, 2003): 255–68. http://dx.doi.org/10.1139/e02-045.

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In the southern Quebec Appalachians, the early tectonic history of the Laurentian margin (Humber zone) comprises foreland-propagating, northwest-directed thrust faulting, nappe emplacement, and regional prograde metamorphism in response to the obduction of large ophiolitic nappes during the Taconian orogeny. In the internal Humber zone, this event is dated at 462 ± 3 Ma (late Middle Ordovician), which is interpreted to represent the timing of near-peak Taconian metamorphism. Superimposed hinterland-directed structures are accompanied by retrograde metamorphism and consist of back thrusts and normal faults, which respectively delimit the northwestern and southeastern limbs of the Sutton and Notre-Dame mountains anticlinoria, both salient structures of the internal Humber zone of southern Quebec. Geochronologic data on the timing of hinterland-directed deformation vary from 431 to 411 Ma. Two tectonic models are presented and discussed, which may account for the Silurian – Early Devonian evolution of the Laurentian margin: (1) back thrusting and syn- to post-compressional crustal extension in response to the tectonic wedging of basement-cored duplexes inducing delamination of supracrustal rocks; (2) tectonic exhumation of the internal Humber zone by extensional collapse. Evidence for Silurian – Early Devonian extensional tectonism in the Humber zone provides the basement infrastructures necessary for the creation and the onset of sedimentation in the Gaspé Belt basins (e.g., Connecticut Valley – Gaspé synclinorium). Several structural, metamorphic features in the internal Humber zone of the northwestern New England Appalachians yield analogous characteristics with those of southern Quebec and may have shared a similar Silurian – Early Devonian tectonic evolution.
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Swisher, Robert E., Stephen R. Westrop, and Lisa Amati. "Systematics and paleobiogeographic significance of the Upper Ordovician pterygometopine trilobiteAchatellaDelo, 1935." Journal of Paleontology 90, no. 1 (January 2016): 59–77. http://dx.doi.org/10.1017/jpa.2015.71.

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AbstractStudy of type and new material of the pterygometopineAchatellaDelo, 1935 demonstrates the presence of four species in Upper Ordovician (Katian) strata of Laurentian North America,A.achates(Billings, 1860) from the northeastern United States and the St. Lawrence lowlands of Canada,A.carleyi(Meek, 1872) from the Cincinnati region, Ohio and Kentucky,A.katharina(Bradley, 1930), from Missouri and Oklahoma, andA.clivosaLespérance and Weissenberger, 1998 from the Gaspé Peninsula, Quebec. Perhaps as many as five additional species are present in Sandbian–Katian strata of the Laurentian terranes of Scotland and Northern Ireland, although only three of these are known well enough to code for phylogenetic analysis. The oldest pterygometopines, including species ofAchatella, are known from Middle Ordovician strata of Baltica. Phylogenetic analysis supports a single migration event from Baltica from Laurentia, followed by a modest diversification in the latter region.
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Bahls, Loren. "Evidence from checklists for a Holarctic (circumboreal) kingdom of diatoms." PhytoKeys 108 (August 13, 2018): 13–24. http://dx.doi.org/10.3897/phytokeys.108.26277.

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Published checklists of freshwater diatoms that represent the American Northwest, Laurentian Great Lakes, Germany and the South Polar Region were compared systematically and the numbers of taxa shared by two or more of these regions were noted. There is a higher level of floristic correspondence between the American Northwest and Germany (71%) and between the American Northwest and the Laurentian Great Lakes (64%) than between the American Northwest and the South Polar Region (45%). These findings support a Holarctic Kingdom of diatoms that is parallel to the Holarctic Kingdom of flowering plants. Mountains and coastal areas and/or inland waters of high salinity may explain why the American Northwest and Germany have more taxa in common than the American Northwest and the Laurentian Great Lakes. Common riverine diatom taxa in the American Northwest are similar to those reported from nationwide monitoring stations. The number of truly cosmopolitan species – those found on all continents – is probably less than 300. The terms “cosmopolitan”, “endemic” and “native” are often misused when applied to diatoms and the first two terms always need to be qualified.
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Kovacs, Michael, and Daniel J. Kirshbaum. "Topographic Impacts on the Spatial Distribution of Deep Convection over Southern Quebec." Journal of Applied Meteorology and Climatology 55, no. 3 (March 2016): 743–62. http://dx.doi.org/10.1175/jamc-d-15-0239.1.

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AbstractObservations and numerical simulations reveal pronounced mesoscale variability in deep-convection occurrence over southern Quebec, Canada. A 22-yr climatology from the McGill radar just west of Montreal shows that deep-convection maxima exist (i) within the St. Lawrence valley surrounding Ottawa; (ii) within the Champlain valley of upstate New York, extending north to just east of Montreal; and (iii) in the lee of the Laurentian Mountains northeast of Trois-Rivières. These features are sensitive to the background low- to midlevel geostrophic wind direction, shifting northward as the southerly wind component increases. A meridional axis of suppressed convection also extends from Lake Ontario and the Adirondacks of New York north through Montreal and into the Laurentians. To physically interpret these features, a suite of quasi-idealized convection-permitting simulations is conducted. Analysis of the simulations, which broadly reproduce the observed extrema in convection occurrence, reveals that the maxima develop within pockets of moisture and mass convergence at the junctions of major river valleys and in the lee of prominent mountain ridges. In these locations, enhanced boundary layer humidity and convective available potential energy (CAPE) coincides with minimal convective inhibition (CIN). The minima occur over and downwind of water bodies, where limited surface heat fluxes reduce CAPE and increase CIN, and over the higher terrain, where reduced low-level moisture limits storm intensity.
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Dissertations / Theses on the topic "Laurentian Mountains Region (Quebec)"

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Sander, Bettina Christa. "Benthic bacterial production in Eastern Townships and Laurentian lakes." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=69681.

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The $ sp3$H thymidine incorporation (TTI) method has been frequently used to estimate benthic bacterial production rates in well oxygenated marine and river sediments, but not in the frequently more reduced lake sediments. In chapter 1, I evaluate the published sediment production literature and examine useful predictors of in situ bacterial production in mostly marine and riverine sediments. In chapters 2 and 3, I estimated and compared benthic production rates by TTI, frequency of dividing cells (FDC), the dilution method (DIL) and sediment respiration (SR) in 13 Quebec lakes to assess the reliability of the TTI based production rates. The TTI method was first calibrated, but despite keeping incubation times short and at in situ temperature, using optimal sediment volumes to saturate $ sp3$H thymidine (TdR) uptake rates, and correcting production rates for $ sp3$H-DNA recovery efficiencies, only a maximum of 10% of $ sp3$H TdR was incorporated into DNA and only extracellular isotope dilution could be accounted for (chapter 2). Most problematic, however, is the increasing presence of active bacteria unable to take up and incorporate TdR as lake sediments become more reduced (chapter 3). TTI based results are also not nearly as well correlated to environmental factors as those obtained from SR. (Abstract shortened by UMI.)
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Books on the topic "Laurentian Mountains Region (Quebec)"

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1836-1910, Homer Winslow, Burns Sarah, Gerdts William H, California Palace of the Legion of Honor., and Amon Carter Museum of Western Art., eds. Winslow Homer: Artist and angler. London: Thames & Hudson, 2002.

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Gerdts, William H., Patricia A. Junker, and Sarah Burns. Winslow Homer: Artist and Angler. Thames & Hudson, 2003.

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Book chapters on the topic "Laurentian Mountains Region (Quebec)"

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McComas, Alan J. "Concepts, Conferences, and Controversies." In Sherrington's Loom, 12–31. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190936549.003.0003.

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This chapter outlines the history of research meetings dealing with consciousness, beginning with that hosted by Herbert Jasper in the Laurentian mountains of Quebec in 1953. It starts, however, with a brief discussion on ancient scientific approaches to medicine, which was jump-started by the Greek physician, Hippocrates. Afterward, the chapter skips forward two millennia to major figures who made breakthroughs in the field of brain science. It also touches on a central debate that reached its climax a little later, as to which part of the brain was responsible for consciousness. The chapter considers whether it was the cerebral cortex, as had been the prevailing assumption, or if it was the brain stem.
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