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The sign and building for Cambrian College in Espanola Cambrian College was founded as a trade school in 1967, during the formation of Ontario's college system. It was originally established with campuses in Sudbury, North Bay and Sault Ste. Marie ; the North Bay and Sault campuses became the independent Canadore College and Sault College in ...
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The Precambrian (/ p r i ˈ k æ m b r i. ə n,-ˈ k eɪ m-/ pree-KAM-bree-ən, -KAYM-; [2] or Pre-Cambrian, sometimes abbreviated pC, or Cryptozoic) is the earliest part of Earth's history, set before the current Phanerozoic Eon.
The Cambrian Line (Welsh: Llinell y Cambrian), sometimes split into the Cambrian Main Line (Welsh: Prif Linell y Cambrian) and Cambrian Coast Line (Welsh: Llinell Arfordir y Cambrian) for its branches, is a railway line that runs from Shrewsbury, England, westwards to Aberystwyth and Pwllheli in Wales.
Volcanic activity, particularly that of large igneous provinces, has been speculated to have been the cause of the environmental crisis. [3] The emplacement of the Namaqualand–Garies dykes in South Africa has been dated to 485 mya, the time at which the Cambrian–Ordovician extinction event occurred, although there remains no unambiguous evidence of a causal relationship between this ...
Cambrian Stage 4 is the still unnamed fourth stage of the Cambrian and the upper stage of Cambrian Series 2. It follows Cambrian Stage 3 and lies below the Wuliuan. The lower boundary has not been formally defined by the International Commission on Stratigraphy. One proposal is the first appearance of two trilobite genera, Olenellus or Redlichia.
The Cambrian quarry was a slate quarry, located to the west of Glyn Ceiriog in Denbighshire, North Wales.There was some small-scale extraction of slate from the 17th century, but commercial extraction began in 1857, and the scale of operation increased from 1873, when the Glyn Valley Tramway opened, providing an easier route to market for the output of the quarry.
The first occurrence of Treptichnus pedum marks the Cambrian-Ediacaran boundary in Newfoundland, although there are several occurrences some metres below.. The opening of the Cambrian period is marked by a number of biological changes, including the extinction of the Ediacara biota, the preponderance of armoured organisms (e.g. the small shelly fossils), and a "widening of the behavioural ...