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Crawford Lake (Halton Region)
Crawford Lake () is a lake near the community of Campbellville, in the town of Milton, Regional Municipality of Halton, Ontario, Canada. It is located within Crawford Lake Conservation Area, a Regionally Environmentally Sensitive Area, an Ontario Area of Natural and Scientific Interest, and part of the Niagara Escarpment World Biosphere Reserve. The primary inflow to the lake is an unnamed creek. Crawford Lake is meromictic, which means it has sequentially deposited seasonal sediment laminations called varves at the bottom; these allow for accurate dating of sediment cores and make Crawford Lake a prime site for archeological and geochemical studies. History Using pollen analysis of the lake, reconstruction of the history of the area over several hundred years was possible. The analysis revealed the agricultural history of the native Iroquoians and a pre-European contact village, through the presence of corn and squash pollen motes. The Wendat-Huron village has been reconst ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Regional Municipality Of Halton
The Regional Municipality of Halton, or Halton Region, is a regional municipality in Ontario, Canada, located in the Golden Horseshoe of Southern Ontario. It comprises the city of Burlington and the towns of Oakville, Milton, and Halton Hills. Policing in the Region is provided by the Halton Regional Police Service. The regional council's headquarters are located in Oakville. Burlington, Oakville, and Milton are largely urban and suburban, while Halton Hills is more rural. Halton is part of the Greater Toronto Area (GTA), although it is the only regional municipality in the GTA that is not situated directly adjacent to Toronto’s city proper. However, the region is split between the census metropolitan areas (CMAs) of Toronto and Hamilton. Burlington is part of the Hamilton CMA, while the rest of the region is part of the Toronto CMA. Halton experienced a growth rate of 17.1% between 2001 and 2006, and 14.2% between 2006 and 2011, giving it one of the highest growth rat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meromictic
A meromictic lake is a lake which has layers of water that do not intermix. In ordinary, holomictic lakes, at least once each year, there is a physical mixing of the surface and the deep waters. The term ''meromictic'' was coined by the Austrian Ingo Findenegg in 1935, apparently based on the older word ''holomictic''. The concepts and terminology used in describing meromictic lakes were essentially complete following some additions by G. Evelyn Hutchinson in 1937. Characteristics Most lakes are ''holomictic'': at least once per year, the surface and the deep waters mix. In monomictic, monomictic lakes, the mixing occurs once per year; in dimictic lake, dimictic lakes, it occurs twice a year (typically spring and autumn), and in polymictic, polymictic lakes, the mixing occurs several times a year. In meromictic lakes, the layers of water can remain unmixed for years, decades, or centuries. Meromictic lakes can usually be divided into three sections or layers. The bottom la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lakes Of Ontario
This is an incomplete list of lakes in Ontario, a province of Canada. There are over 250,000 lakes in Ontario, constituting around 20% of the world's fresh water supply. Larger lake statistics This is a list of lakes of Ontario with an area larger than . # * 24 Mile Lake A B C D E F G * Gananoque Lake * Garson Lake * Gathering Lake *Gibson Lake (other), multiple lakes * Gibson Lake (Greater Sudbury) * Gillies Lake * Gloucester Pool * Go Home Lake *Golden Lake * Gordon Lake *Ghost Lake *Gould Lake (other), several lakes * Green Lake * Grundy Lake * Guelph Lake * Gull Lake (Ontario) * Gullrock Lake *Gunter Lake H * Halet Lake * Halls Lake (Haliburton County) * Hammer Lake * Head Lake (Kawartha Lakes) * Head Lake (Haliburton County) * Heart Lake * Herbert Lake *Holden Lake *Lake Huron * Horseshoe Lake multiple lakes I * Inn Lake * Indian Lake * Innis Lake * Irwin Lake * Ivanhoe Lake J * Jack Lake * Jeff Lake *Lake Joseph * Jules Lake * Jum ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anthropocene
''Anthropocene'' is a term that has been used to refer to the period of time during which human impact on the environment, humanity has become a planetary force of change. It appears in scientific and social discourse, especially with respect to accelerating geophysical and biochemical changes that characterize the 20th and 21st centuries on Earth. Originally a proposal for a new geological epoch following the Holocene, it was rejected as such in 2024 by the International Commission on Stratigraphy (ICS) and the International Union of Geological Sciences (IUGS). The term has been used in research relating to Earth's Ocean, water, geology, geomorphology, landscape, limnology, hydrology, ecosystems and climate. The effects of human activities on Earth can be seen, for example, in regards to biodiversity loss, and climate change. Various start dates for the Anthropocene have been proposed, ranging from the beginning of the Neolithic Revolution (12,000–15,000 years ago), to as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Global Boundary Stratotype Section And Point
A Global Boundary Stratotype Section and Point (GSSP), sometimes referred to as a golden spike, is an internationally agreed upon reference point on a stratigraphic section which defines the lower boundary of a stage on the geologic time scale. The effort to define GSSPs is conducted by the International Commission on Stratigraphy, a part of the International Union of Geological Sciences. Most, but not all, GSSPs are based on paleontological changes. Hence GSSPs are usually described in terms of transitions between different faunal stages, though far more faunal stages have been described than GSSPs. The GSSP definition effort commenced in 1977. As of 2024, 79 of the 101 stages that need a GSSP have a ratified GSSP. Rules A geologic section has to fulfill a set of criteria to be adapted as a GSSP by the ICS. The following list summarizes the criteria: * A GSSP has to define the lower boundary of a geologic stage. * The lower boundary has to be defined using a primary mar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conservation Area
Protected areas or conservation areas are locations which receive protection because of their recognized natural or cultural values. Protected areas are those areas in which human presence or the exploitation of natural resources (e.g. firewood, non-timber forest products, water, ...) is limited. The term "protected area" also includes marine protected areas and transboundary protected areas across multiple borders. As of 2016, there are over 161,000 protected areas representing about 17 percent of the world's land surface area (excluding Antarctica). For waters under national jurisdiction beyond inland waters, there are 14,688 Marine Protected Areas (MPAs), covering approximately 10.2% of coastal and marine areas and 4.12% of global ocean areas. In contrast, only 0.25% of the world's oceans beyond national jurisdiction are covered by MPAs. In recent years, the 30 by 30 initiative has targeted to protect 30% of ocean territory and 30% of land territory worldwide by 2030; t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wyandot People
The Wyandot people (also Wyandotte, Wendat, Waⁿdát, or Huron) are an Indigenous people of the Northeastern Woodlands of the present-day United States and Canada. Their Wyandot language belongs to the Iroquoian languages, Iroquoian language family. In Canada, the Huron-Wendat Nation has two First Nations in Canada, First Nations Indian reserve, reserves at Wendake, Quebec. In the United States, the Wyandotte Nation is a federally recognized tribe headquartered in Wyandotte, Oklahoma. There are also List of organizations that self-identify as Native American tribes, organizations that self-identify as Wyandot. The Wendat emerged as a confederacy of five nations in the St. Lawrence River Valley, especially in Southern Ontario, including the north shore of Lake Ontario. Their original homeland extended to the Georgian Bay of Lake Huron and Lake Simcoe in Ontario, Canada and occupied territory around the western part of the lake. The Wyandotte Nation (the U.S. Tribe) descends f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iroquoian
The Iroquoian languages () are a language family of indigenous peoples of North America. They are known for their general lack of labial consonants. The Iroquoian languages are polysynthetic and head-marking. As of 2020, almost all surviving Iroquoian languages are severely or critically endangered, with some languages having only a few elderly speakers remaining. The two languages with the most speakers, Mohawk (Kenien'kéha) in New York and Canada, and Cherokee in Oklahoma and North Carolina, are spoken by less than 10% of the populations of their nations. Family division *Iroquoian **Northern Iroquoian ***(Lake Iroquoian) ****Iroquois Proper (Five Nations) ***** Seneca (severely endangered) ***** Cayuga (severely endangered) ***** Onondaga (severely endangered) *****Susquehannock or Conestoga *****Mohawk–Oneida ****** Oneida (severely endangered) ****** Mohawk ****Huronian ***** Huron-Wyandot ***** Petun (Tobacco) ***Tuscarora–Nottoway **** Tuscarora **** Meherri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pollen Analysis
Palynology is the study of microorganisms and microscopic fragments of mega-organisms that are composed of acid-resistant organic material and occur in sediments, sedimentary rocks, and even some metasedimentary rocks. Palynomorphs are the microscopic, acid-resistant organic remains and debris produced by a wide variety of plants, animals, and Protista that have existed since the late Proterozoic.Neuendorf, K.K.E., J.P. Mehl, Jr., and J.A. Jackson, eds., 2005, ''Glossary of Geology'' (5th ed.). Alexandria, Virginia, American Geological Institute. 779 pp. It is the science that studies contemporary and fossil palynomorphs (paleopalynology), including pollen, spores, orbicules, dinocysts, acritarchs, chitinozoans and scolecodonts, together with particulate organic matter (POM) and kerogen found in sedimentary rocks and sediments. Palynology does not include diatoms, foraminiferans or other organisms with siliceous or calcareous tests. The name of the science and organ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Varve
A varve is an annual layer of sediment or sedimentary rock. The word 'varve' derives from the Swedish word ''varv'' whose meanings and connotations include 'revolution', 'in layers', and 'circle'. Of the many rhythmites in the geological record, varves are one of the most important and illuminating in studies of past climate change. Varves are amongst the smallest-scale events recognised in stratigraphy. An annual layer can be highly visible because the particles washed into the layer in the spring when there is greater flow strength are much coarser than those deposited later in the year. This forms a pair of layers—one coarse and one fine—for each annual cycle. Varves form only in fresh or brackish water, because the high levels of salt in normal sea water coagulate the clay into coarse grains. Since the saline waters leave coarse particles all year, it is nearly impossible to distinguish the individual layers in salt waters. Indeed, clay flocculation occurs at high ioni ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Man And The Biosphere Programme
Man and the Biosphere Programme (MAB) is an intergovernmental scientific program, launched in 1971 by UNESCO, that aims to establish a scientific basis for the 'improvement of relationships' between people and their environments. MAB engages with the international development agenda, especially the Sustainable Development Goals and the Post-2015 Development Agenda, Post 2015 Development Agenda. The MAB programme provides a platform for cooperation in research and development. , 759 sites across 136 countries, including 22 transboundary sites, have been included in the World Network of Biosphere Reserves. The reserves cover more than 5% of the world’s surface and are home to over 260 million people. Biosphere reserves Biosphere reserves are areas comprising terrestrial, marine and coastal ecosystems. Its biosphere reserves are nominated by national governments and remain under the sovereign jurisdiction of the states where they are located. Their status is internationally rec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ontario
Ontario is the southernmost Provinces and territories of Canada, province of Canada. Located in Central Canada, Ontario is the Population of Canada by province and territory, country's most populous province. As of the 2021 Canadian census, it is home to 38.5% of the country's population, and is the second-largest province by total area (after Quebec). Ontario is Canada's fourth-largest jurisdiction in total area of all the Canadian provinces and territories. It is home to the nation's capital, Ottawa, and its list of the largest municipalities in Canada by population, most populous city, Toronto, which is Ontario's provincial capital. Ontario is bordered by the province of Manitoba to the west, Hudson Bay and James Bay to the north, and Quebec to the east and northeast. To the south, it is bordered by the U.S. states of (from west to east) Minnesota, Michigan, Ohio, Pennsylvania, and New York (state), New York. Almost all of Ontario's border with the United States follows riv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
