Cambrian-Line - Factbites

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Topic: Cambrian-Line

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	Cambrian - Wikipedia, the free encyclopedia
		Cambrian continents are thought to have resulted from the breakup of a neoproterozoic supercontinent called Rodinia.
		The Cambrian is a major division of the geologic timescale that begins about 542 Ma (million years ago) at the end of the Proterozoic eon and ended about 488.3 Ma with the beginning of the Ordovician period (ICS, 2004).
		The Cambrian period follows after the Neoproterozoic and is followed by the Ordovician period.
	en.wikipedia.org /wiki/Cambrian (942 words)

	Cambrian explosion - Wikipedia, the free encyclopedia
		An emerging view is that the Cambrian explosion is the macroscopic conclusion to a prolonged period of evolution begun ~30 million years earlier with the innovation of multi-cellular organisms.
		The Cambrian explosion refers to the geologically sudden appearance of complex multi-cellular macroscopic organisms between roughly 542 and 530 million years ago (mya).
		From the modern point of view, the apparently explosive radiation from obscure beginnings was partly an artefact of disregarding microfossils, which were scarcely detectable with 19th-century technology, and concentrating solely on the hard-shelled macrofossils that defined the phyla well established by 19th-century biologists, all of which were multiple-celled metazoa.
	en.wikipedia.org /wiki/Cambrian_explosion (1083 words)

	Palaeos Ecology : Biota : The Cambrian evolutionary biota
		The Cambrian fauna was dominated by low-level suspension feeders such as the nonarticulate brachiopods and eocrinoids together with monoplacophoran and hyolith mollusks.
		Palaeos Ecology : Biota : The Cambrian evolutionary biota
		Cambrian communities were loosely organized and considerable experimentation and morphological flexibility were features of many troops (Hughes, 1994).
	www.palaeos.com /Ecology/Biota/Cambrian.html (318 words)

	Cambrian Period
		This page describes the Cambrian Period, including stratigraphy, the fossil record, and the phenomenon known as the “Cambrian explosion.” Three famous lagerstätten – Chengjiang, Sirius Passet and the Burgess Shale &; are briefly discussed, followed by a sketched outline of some of the major fossil groups.
		Bengtson, Stefan; Zhao, Yue 1997: Fossilized Metazoan Embryos from the Earliest Cambrian.
		Extinction rates were generally high throughout the Cambrian, typically between 20 and 30%, but two major peaks in the mid Cambrian (Upper Solvan) and at the close of the Cambrian (Dolgellian) qualify as mass extinctions.
	www.peripatus.gen.nz /paleontology/Cambrian.html (4724 words)

	CC300: Cambrian Explosion
		The Cambrian explosion was the seemingly sudden appearance of a variety of complex animals about 540 million years ago (Mya), but it was not the origin of complex life.
		The length of the Cambrian explosion is ambiguous and uncertain, but five to ten million years is a reasonable estimate; some say the explosion spans forty million years or more, starting about 553 million years ago.
		A "snowball earth" before the Cambrian explosion may have hindered development of complexity or kept populations down so that fossils would be too rare to expect to find today.
	www.talkorigins.org /indexcc/CC/CC300.html (1092 words)

	The Cambrian Explsion
		The Cambrian rocks of the geologic column contain a proliferation of complex life; however, no trace of predecessors to such complex and sometimes offbeat organisms is to be found in Precambrian rocks.
		While this does not necessarily entail that all animal phyla came into existence during the Cambrian explosion – some scientists believe that the "explosion" was a change in climate that produced conditions favorable for the fossilization of preexisting phyla– the evidence for a period of astounding diversification of life is overwhelming.
		The animals that made their abrupt appearance during the Cambrian explosion are ancestors of virtually all the creatures that swim, fly, and crawl today.
	www.angelfire.com /tn/tifni/misc/cambrianexplosion.html (1045 words)

	Palaeos Paleozoic: Cambrian: The Cambrian Period - 1
		The most characteristic animals of the Cambrian period were the trilobites, a primitive form of arthropod remarkable for it's highly developed eyes (unusual in such an early organism).
		During the 53 million years that the Cambrian period lasted there was the sudden appearance and diversification of almost every major group (phylum) of animal life, as well as many types that later died out.
		Laurentia stretched across the Cambrian equator, partly submerged by the Iapetus ocean, with a mostly mostly submerged Baltica and Siberia approaching from the South-East.
	www.palaeos.com /Paleozoic/Cambrian/Cambrian.htm (2491 words)

	GeoFacts No. 20, The Geology of Ohio--The Cambrian
		As the Cambrian sea continued to flood the craton during the opening of the Iapetus Ocean, the waters deepened across Ohio, and carbonate deposition began in eastern Ohio as the Rome Formation accumulated.
		Cambrian rocks in Ohio have been the last of the Paleozoic systems to be explored for economic benefits because of their great depth below the surface.
		Were it not for this dramatic occurrence, the 65-million-year-long Cambrian Period would not be regarded as the beginning of a new, and perhaps the most significant, era in the history of the Earth.
	www.ohiodnr.com /geosurvey/geo_fact/geo_f20.htm (1568 words)

	Life During the Cambrian Period
		Finally, the Cambrian saw the appearance and/or diversification of mineralized algae of various types, such as the coralline red algae and the dasyclad green algae.
		Cambrian echinoderms were predominantly unfamiliar and strange-looking types such as early edrioasteroids, eocrinoids, and helicoplacoids.
		And while jawless vertebrates were present in the Cambrian, it was not until the Ordovician that armored fish became common enough to leave a rich fossil record.
	www.ucmp.berkeley.edu /cambrian/camblife.html (571 words)

	Evolution: Library: The Cambrian Explosion
		Recent research suggests that the period prior to the Cambrian explosion saw the gradual evolution of a "genetic tool kit" of genes that govern developmental processes.
		This stunning and unique evolutionary flowering is termed the "Cambrian explosion," taking the name of the geological age in whose early part it occurred.
		External, ecological factors like these were undoubtedly important in creating the opportunity for the Cambrian explosion to occur.
	www.pbs.org /wgbh/evolution/library/03/4/l_034_02.html (824 words)

	Cambrian College - Cambrian International
		Cambrian College of Applied Arts and Technology is the largest college in Northern Ontario and one of 25 colleges of applied arts and technology that comprise the Ontario College System.
		Cambrian College welcomes applications from all countries from individuals wishing to pursue their post-secondary and professional development goals in Canada.
		Cambrian College’s main campus is located in The City of Greater Sudbury, Ontario, Canada, a 4-hour (375 km) drive northwest of Toronto.
	homepages.cambrianc.on.ca /international/international_students.htm (452 words)

	Cambrian jellyfish, Climactichnites and arthropod tracks
		This layer is of rippled, medium-grained quartz sandstone surfaces of an ancient Cambrian tidal shoreline.
		It was during the Cambrian that animals with hard shells first appeared, enabling a rich fossil record to begin.
		Climactichnites is a unique Upper Cambrian band-like fossil described as a trace found in sandstone formations throughout the northeastern and north-central US and southeastern Canada.
	www.fossilmuseum.net /Fossil_Sites/Amazing_Cambrian_Quarry_in_Wisconsin/Amazing_Cambrian_Quarry_in_Wisconsin.htm (845 words)

	Cambrian bibliography
		Zharkov, M. A., Chechel', E. I., and Knyasev, I. M., 1963, Cambrian deposits of middle and upper stream of the river Kirenga: Academy of Sciences of the USSR Reports, v.
		Lokhmatov, G. I., 1966, Change of contents of lower Cambrian carbonate deposits under the influence of consediment formation of geological structures (south of Siberian Platform): Academy of Sciences of the USSR Reports, v.
		McKee, E. D., 1945, Cambrian History of the Grand Canyon Region: Washington, D.C., Carnegie Institute of Washington, 232 p.; Publication 563, Part I. Muller, K. J., 1983, Crustacea with preserved soft parts from the Upper Cambrian of Sweden: Lethaia, v.
	www.talkorigins.org /origins/biblio/cambrian.html (2135 words)

	The Cambrian Period
		The Cambrian Period marks an important point in the history of life on earth; it is the time when most of the major groups of animals first appear in the fossil record.
		It was once thought that the Cambrian rocks contained the first and oldest fossil animals, but these are now to be found in the earlier Vendian strata.
		The Cambrian Period is part of the Paleozoic Era.
	www.ucmp.berkeley.edu /cambrian/camb.html (272 words)

	CAMBRIAN - Online Information article about CAMBRIAN
		division is the equivalent of the Lower Cambrian.
		Consequently, Cambrian strata are usually unconformable on older rocks.
		SYSTEM In the Thuringer Wald are certain strata, presumably Cambrian since the uppermost beds contain the Euloma-See also:
	encyclopedia.jrank.org /CAL_CAR/CAMBRIAN.html (1796 words)

	Cambrian Real Estate and Homes for Sale in Santa Clara County, California
		The Cambrian area of south west San Jose in Santa Clara County is a quiet, tightly-knit, highly desirable community of some 40,000 residents forming the south western part of the Willow Glen neighborhoods.
		A majority of the area is served by the Union and Cambrian Elementary and Middle School districts, each of which have earned the designation, California Distinguished Schools, with student test scores in the 90th percentiles.
		The appreciation of Cambrian homes has dramatically increased due to strong demand, the surrounding employment base, safe quiet neighborhoods, and the desirability of the best of living in the South Bay.
	www.cambrian-real-estate-and-homes.com (1045 words)

	Crustaceans and the "Cambrian Explosion" -- Budd et al. 294 (5549): 2047 -- Science
		Sets of autapomorphies are numbered consecutively in square boxes; the question mark points to the unresolved situation in the stem line of the as-yet-unnamed taxon N.N. All taxa herein coexisted in the Late Cambrian Orsten assemblages, whereas the Phosphatocopida record extends down to the Early Cambrian.
		Cambrian adaptive radiation [in the sense of (5)] of
		The phosphatocopids of (1) fall in their expected sequence, as derived stem group crustaceans, consistent with the earliest arthropodan trace and body fossils in the middle and lower Lower Cambrian.
	www.sciencemag.org /cgi/content/full/294/5549/2047a (931 words)

	Late Cambrian
		The Late Cambrian is marked by the first appearance of perhaps the very first agnostid trilobite, Glyptagnostus reticulatus, at Paibi.
		The Early Cambrian sea floor seems to have been compact and stiff.
		For reasons less easily explained, the rate of weathering on land also increased, so that the amount of recently deposited sediment was, on average, also somewhat larger that in previous epochs.
	www.palaeos.com /Paleozoic/Cambrian/LateCam.html (820 words)

	Evolution's Big Bang
		Then suddenly, in the Cambrian geological period, the earth is populated with a huge diversity of complex multicellular life forms.
		During the Cambrian, new forms of life could readily appear because the genetic organization of organisms was relatively loose.
		Therefore, while the evidence of the Cambrian may be perplexing, the fact that scientists are wrestling with it and offering some possible explanations is exciting and invigorating.
	www.leaderu.com /orgs/probe/docs/bigbang.html (2875 words)

	The Cambrian
		Cambrian exposures can be found in areas like the Basin and Range (throughout the West), the Rocky and Appalachian Mountains, and in New England, as well as in Wisconsin and many other states.
		Early Cambrian Fossils in Western Nevada: A virtual field trip to one of the most productive early Cambrian fossil localities in North America, a site in the remote reaches of Nevada where trilobites, archeocyathids, invertebrate tracks and trails, brachiopods, salterella (extinct tusk-shaped animal) and algae nodules can be found.
		Throughout the Cambrian, Siberia remained east of Laurentia, while Baltica was moving south of Siberia and southeast of Laurentia.
	www.paleoportal.org /time_space/period.php?period_id=16 (1149 words)

	BBC Evolution Weekend: Extinction Files - Mass Extinctions
		But as the Cambrian drew to a close, half a billion years ago, the experiment came to an end and there were a series of mass extinctions.
		the cause(s) of the late Cambrian extinction are not well known, but it seems almost certain that a change in sea level occurred at this time, changing the habitat to which many of these early animals were adapted, and driving them to extinction.
		A huge explosion of biological diversity took place in the Cambrian, which has been likened to an evolutionary experiment, a 'trying out' period for animal designs or 'phyla'.
	www.bbc.co.uk /education/darwin/exfiles/cambrian.htm (187 words)

	Cambrian - for live artistes
		Cambrian’s core business is the supply of live artistes for UK holidays, world hotels, cruising and corporate events, we will also be happy to put our know-how behind any entertainment project you may wish to discuss with us.
		Cambrian prides itself on being more than just an Entertainment Agency; our area of expertise is providing you with the entire package of well-balanced Entertainment that most suits your audience and venue needs.
		This website is designed to be informative, so please feel free to explore it in its entirety, and be sure to checkout the Product Page for examples of our services and Meet the Team page for contact details.
	www.cambrian.tv (135 words)

	Cambrian-Images.co.uk
		Cambrian Images is funded by the Welsh European Funding Office and the Powys Regeneration Partnership.
		Cambrian Images also has a large collection of professional camera equipment available on hire to photographers who want to contribute to the collection.
		Cambrian Images is dedicated to showcasing the forgotten wilderness and day to day life of Mid-Wales.
	www.cambrian-images.co.uk (164 words)

	Resource Investor - Energy - Coal Fears Preying on Cambrian
		Overall, the outlook for Cambrian as an investment remains an uncertain one, given the knock on effect that the strength of the coal market is likely to continue to have on the company’s market valuation and the lack yet of any conspicuous new winners in its own investment portfolio.
		Cambrian came to a moderate level of prominence largely on the back of the success of its investments in Western Canadian and Asia Energy, but since these, further blockbusters have yet to become apparent.
		By structuring its business in this fashion, Cambrian insulates its shareholders from the direct dilution that might be entailed in the development of the various projects held by its subsidiaries were they to be held by Cambrian itself, but retains deal making flexibility through the subsidiaries and their capacity to issue equity.
	www.resourceinvestor.com /pebble.asp?relid=15307 (777 words)

	Cambrian Insurance
		Cambrian Insurance is a northern based general insurance brokerage with offices in Sudbury, Azilda, West Nipissing, North Bay and Toronto.
		Founded in 1965, Cambrian Insurance represents some of the world's pre-eminent insurers, and provides a full range of insurance and financial products.
	www.cambrianinsurance.com (42 words)

	Paleobiology 3
		The Cambrian is bracketed by large scale glaciation at the close of the Proterozoic and by a similar occurrence early in the Ordovician.
		The sudden appearance of relatively complex fossils in the Cambrian was a troubling issue to Charles Darwin.
		This scarcity of the precambrian fossil record is also a consequence of the soft-bodied forms of life needing exceptionally rare circumstances to form fossils.
	www.emc.maricopa.edu /faculty/farabee/BIOBK/BioBookPaleo3.html (4490 words)

	Cambrian
		For the Cambrian, note that the continents are separate (not all assembled into Pangea until the end of the Paleozoic), and that they are primarily located in tropical latitudes.
		Says Cambrian was a time of the initial proliferation of organisms and life in general.
		Indeed, the Cambrian and Ordovician are times of widespread deposition of carbonates, particularly in the Appalachian region.
	www.gpc.edu /~pgore/geology/geo102/cambrian.htm (919 words)

	MSN Encarta - Cambrian Period
		Cambrian Period, first division of the Paleozoic Era of the geologic time scale, spanning an interval of about 46 million years, from 542 million to...
		The Cambrian Period, 540 to 500 Million Years Before Present
		Become a subscriber today and gain access to:
	encarta.msn.com /encyclopedia_761574404/Cambrian_Period.html (89 words)

	Welcome to Cambrian Academy Sports Tours
		The Cambrian Academy has professional relationships with many of the biggest football clubs in the world and caters for all age groups and standards both male and female.
		Cambrian Academy Sports Tours are now active in many continents of the world including, Oceania, Europe and America.
		The Cambrian Academy team is a young and enthusiastic company run by footballing people.
	www.cambrian-academy.com /usa/home.htm (118 words)

	Cambrian Explosion at opensource encyclopedia
		The Cambrian Explosion is the commonly used term to denote the radiation of animal phyla that started about 570 million years ago, which is 30 million years after the beginning of the Cambrian geologic period, and which proceeded through the Cambrian.
		"Cambrian Explosion" in world wide web people finder »
		The extinctions connected with the Varangian glaciation that preceded this radiation (popularized as 'Snowball Earth'), along with subsequent greenhouse warming of the Earth, is theorized to have provided the evolutionary impetus.
	www.wiki.tatet.com /Cambrian_explosion.html (265 words)

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In the News (Wed 30 Dec 09)