The Oak Ridges Moraine is a geological landform that runs east-west across south central Ontario, Canada. It developed about 12,000 years ago, during the Wisconsin glaciation in North America. A complex ridge of sedimentary material, the moraine is known to have partially developed under water. The Niagara Escarpment played a key role in forming the moraine in that it acted as a dam for glacial meltwater trapped between it and two ice lobes.
In order to understand the process by which the moraine formed, it is necessary to understand the physical geography in which it currently exists (that is, its physiography), and the layers of sediments found within it (the stratigraphy of the moraine).
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TheOakRidgesMoraine is a geological landform that runs east-west across south central Ontario, Canada. It developed about 12,000 years ago, during the...
A terminal moraine, also called an end moraine, is a type ofmoraine that forms at the terminal (edge) of a glacier, marking its maximum advance. At this...
of exposed Precambrian igneous and high-grade metamorphic rocks. It forms the North American Craton (or Laurentia), the ancient geologic core ofthe North...
southeastern New York OakRidgesMoraine – Glacial till landform above Lake Ontario, Canada Valparaiso Moraine – Moraine in the midwestern United States...
geology, a proglacial lake is a lake formed either by the damming action of a moraine during the retreat of a melting glacier, a glacial ice dam, or by meltwater...
re-advanced during the Younger Dryas, depositing a moraine from west Lake Superior to southeast Quebec. Along the southern margins ofthe Great Lakes, spruce...
surfaces". The Irish word was and is used particularly to describe long sinuous ridges, which are now known to be deposits of fluvio-glacial material. The best-known...
formed moraines, the Park Moraine in present-day Illinois and the Lake Borders Moraine in Indiana and Michigan. The ice continued northward forming the next...
terminal moraines that form Long Island, Block Island, Cape Cod, Nomans Land, Martha's Vineyard, Nantucket, Sable Island, and theOakRidgesMoraine in south-central...
Philipp (8 June 2017). "New fossils from Jebel Irhoud, Morocco and the pan-African originof Homo sapiens" (PDF). Nature. 546 (7657): 289–292. Bibcode:2017Natur...
Esmark discovered the similarity between moraines near Haukalivatnet lake near sea level in Rogaland and moraines at branches of Jostedalsbreen. Esmark's...
north–south moraine system along the eastern coast of Chiloé Island (41.5–43° S). By that time the glaciation at the latitude of Chiloé was of ice sheet...
pollen zone E4 in the type area (city of Amersfoort, Netherlands). Here this zone is characterized by the expansion of Quercus (oak), Corylus (hazel)...
well above the Arctic Circle at 71°10′21″N 25°47′40″E / 71.17250°N 25.79444°E / 71.17250; 25.79444. Hardwood trees such as hazel and oak grew as far...
in rows, trains or clusters along the lateral moraines as opposed to being located on the terminal moraine or in the general glacial field. Erratics provide...
created much ofthe surface geology of southern Canada and the northern United States, leaving behind glacially scoured valleys, moraines, eskers and glacial...
principally to the west through the passes ofthe coast range. Whenever the ice sheet melted from the north at a moraine, water would begin to pond in the divide...
Ground moraines are formed with melts out ofthe glacier in irregular heaps, forming rolling hills. Till plains are common in areas such as the Midwestern...
terminal moraine region, the kettles are fairly small but deep, to fit between themoraine's steep and hilly ridges. If the ice had advanced outward and...
the highest shoreline of Lake Agassiz. The Big Stone Moraine formed the southern boundary ofthe lake. During the Lockhart Phase the lake is estimated to...
proglacial lake that existed in east-central North America at the time ofthe last ice age. Parts ofthe former lake are now Lake Huron, Georgian Bay, Lake Superior...
core samples whereas the changing abundance pattern of fauna and flora are most commonly used when examining lake sediments. Moraine belts are usually studied...
farming, except on ridge tops and in river valleys. The sides oftheridges are often too steep for farming, and are usually forested. The Coulee Experimental...
range lying between the Dent d'Herens and the Pizzo Bianco near Macugnaga. The minor ridges on the north side ofthe border are parallel to this latter range...
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