Cambrian period

(redirected from Cambrian)
Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.

Cambrian period

a geological period which began about 515 million years ago and ended 445 million years ago. At this time the British Isles lay in the southern hemisphere and the Sahara was at the South Pole and subject to extensive glaciation. Trilobites and Brachiopods flourished and most invertebrate phyla had evolved. The first graptolites appeared in the mid-Cambrian, but few traces of plants have been found and these are largely limited to simple algae. see GEOLOGICAL TIME.
References in periodicals archive ?
Release date- 14082019 - Transport For Wales Rail Services - The Cambrian Line has been selected to feature in two national TV documentaries which showcase the world's most scenic railway journeys, Transport for Wales has announced.
The series of walks - dubbed the Cambrian Mountains Legs 11 and launched to tie in with National Walking Month this month - include routes across Ceredigion, Powys and Carmarthenshire.
Using state-of-the-art analysis of carbon and sulphur isotopes in Cambrian-age marine sedimentary rocks, University College London (UCL) and the University of Leeds have shown that large fluctuations in early Cambrian biodiversity of animals coincided with pulses of oxygen to the atmosphere and shallow-ocean.
Cambrian Training is aiming to raise sponsorship of PS1 per mile for the challenge, which will contribute towards the company's PS1,500 fundraising target.
Welsh League division one side Cambrian shocked holders The New Saints 2-1 after extra time in the other semi-final.
"This is critical, as it is the first observation of a Precambrian-like banded iron formation that is Early Cambrian in age.
The change from the depositional sequence "transgressive system tract a condensed section a high stand system tract" in Xuzhuang Formation to the drowning unconformity type in the overlying strata controlled by "condensed section a high stand system tract" sequence defines the evolution of carbonate platform from a developing to a mature stage in the north China during Cambrian time.
This is the fourth time Pakistan Army has won Gold Medal in the Cambrian Patrol.
Cambrian Patrol is physically challenging and arduous exercise which concentrates on teamwork for achieving the mission held in the most unforgiving mountainous terrain of mid-Wales, UK, amid tactical and technical challenges, testing leadership, self-discipline, courage and determination of the participants.
Abstract Previous late Precambrian and Cambrian correlation charts of Estonia, summarizing the regional stratigraphic nomenclature of the 20th century, date back to 1997.
The future is looking more secure for several innovation projects at Cambrian College in Sudbury with a large grant coming their way.
COAS, while meeting with Pakistan Army team which won Gold Medal in "Exercise Cambrian Patrol" held in UK last month, felicitated the team for their tremendous performance in international event.