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Topic: Nena (supercontinent)

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Atlantica

Baltica

Euramerica

Ur (continent)

Supercontinent

Pannotia

Arctica

Kenorland

Rodinia

Craton

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	Supercontinent (Site not responding. Last check: 2007-11-04)
		Since the definition of continent is arbitrary, the definition of supercontinent is also arbitrary (as is the definition of a subcontinent), but the term refers to a landmass containing more than one of the modern continents.
		Most commonly, the term supercontinent is used to refer to a landmass consisting of all the modern continents.
		Supercontinents block the flow of heat from the Earth 's interior, and thus cause the asthenosphere to overheat.
	www.sciencedaily.com /encyclopedia/supercontinent (479 words)

	Supercontinent - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-11-04)
		A supercontinent is a mass of land comprising more than one continental core, or craton.
		Most commonly, paleogeographers employ the term "supercontinent" to refer to a landmass consisting of all the modern continents, of which the most familiar example is Pangaea ( Greek for all lands).
		John J. Rogers and M. Santosh have proposed the existence of a yet older supercontinent, Columbia, that was formed and broken up during a period of 1.8 to 1.5 billion years (1.8-1.5 Ga) ago.
	www.phatnav.com /wiki/index.php?title=Supercontinent (463 words)

	Nena (supercontinent) - Wikipedia, the free encyclopedia
		Nena consisted of the cratons of Arctica, Baltica, and Antarctica.
		All of the pieces of Nena were together.
		Most of Nena was in Protolaurasia, but Eastern Antarctica was in Protogondwana.
	en.wikipedia.org /wiki/Nena_(supercontinent) (129 words)

	Supercontinent -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-11-04)
		Most commonly, (Click link for more info and facts about paleogeographers) paleogeographers employ the term supercontinent to refer to a landmass consisting of all the modern continents, of which the most familiar example is Pangaea ( (A native or inhabitant of Greece) Greek for all lands).
		Continental drift then brought the fragments together in a different configuration, resulting in another supercontinent, ((plate tectonics) a hypothetical continent including all the landmass of the earth prior to the Triassic period when it split into Laurasia and Gondwanaland) Pangaea, forming in the late (From 544 million to about 230 million years ago) Paleozoic.
		Supercontinents block the flow of heat from the (The 3rd planet from the sun; the planet on which we live) Earth 's interior, and thus cause the (The lower layer of the crust) asthenosphere to overheat.
	www.absoluteastronomy.com /encyclopedia/s/su/supercontinent.htm (570 words)

	[No title] (Site not responding. Last check: 2007-11-04)
		In geology, a supercontinent is a land mass comprising more than one continental core, or craton.
		Most commonly, paleogeographers employ the term supercontinent to refer to a single landmass consisting of all the modern continents.
		Some historians call the combined land mass of Africa and Eurasia the supercontinent Africa-Eurasia, but it is not a geological supercontinent.
	www.mindwallet.com /wiki/Supercontinent (390 words)

	Supercontinent - Iridis Encyclopedia (Site not responding. Last check: 2007-11-04)
		However more modern studies have shown that supercontinents form in cycles, coming together and breaking apart again, through continental drift, about every 250 million years.
		The supercontinent Rodinia broke up roughly 750 million years ago.
		Rogers and Santosh have proposed the existence of a yet older supercontinent, Columbia, that was formed and broken up during a period of 1.8 to 1.5 billion years (1.8-1.5 Ga) ago.
	www.iridis.com /Supercontinent (359 words)

	Nena (supercontinent) (Site not responding. Last check: 2007-11-04)
		Nena consisted of the cratons of Arctica, Baltica, and Eastern Antartica.
		Most of Nena was in Protolaurasia, but Eastern Antartica was in Protogondwana.
		All of the cratons of Nena separated, and Arctica rifted into Siberia and Laurentia nearly rifted apart.
	brainyencyclopedia.com /encyclopedia/n/ne/nena__supercontinent_.html (172 words)

	Laurentia -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-11-04)
		Many times in its past, Laurentia has been a separate (One of the large landmasses of the earth) continent as it is now in the form of North America.
		~1.8 billion years ago, Laurentia was part of the major supercontinent (A North American river; rises in southwestern Canada and flows southward across Washington to form the border between Washington and Oregon before emptying into the Pacific; known for its salmon runs in the spring) Columbia.
		Laurentia was part of the minor supercontinent Laurasia.
	www.absoluteastronomy.com /encyclopedia/L/La/Laurentia.htm (632 words)

	Baltica Guides, Tutorials (Site not responding. Last check: 2007-11-04)
		~1.5 billion years ago, Baltica along with Arctica and Eastern Antarctica were part of the minor supercontinent Nena.
		Baltica was part of the minor supercontinent Laurasia.
		Baltica will be part of the major supercontinent Pangæa Ultima.
	www.masterliness.com /a/Baltica.htm (311 words)

	In the beginning, there was Ur
		Then he saw a pattern that nobody else ever had: Continental rock in the ancient supercontinent Pangea was grouped by age.
		Pangea was the last supercontinent, a giant conglomeration of all the continents.
		When Nena, Atlantica, and Ur came together one billion years ago, the supercontinent Rodinia was born.
	research.unc.edu /endeavors/spr97/ur.html (987 words)

	Laurentia
		Many times in its past, Laurentia has been a separate continent as it is now in the form of North America.
		~2.1 billion years ago, when Kenorland shattered, the Arctican craton was part of the minor supercontinent Nena along with Baltica and Eastern Antarctica.
		~1.8 billion years ago, Laurentia was part of the major supercontinent Columbia.
	www.1bx.com /en/Laurentia.htm (334 words)

	k34 Evidence of supercontinents
		Rhodinia,, evidently was forming as 0.6-0.8 Gy orogenies record in the now shield rocks of South America, Africa, and Asia.
		For that same supercontinent, Fortey has floated the name Suessia to honor (lest we forget!) the great geological synthesizer of yore.
		No earlier supercontinents are evidenced though a first continent 3Ga is, named (what else?) Ur.
	geowords.com /histbooknetscape/k34.htm (442 words)

	Plumes (no frames)
		It is known that supercontinents existed in the Precambrian, including Rodinia, others including Nena are hypothesised to have exited before then.
		Rodinia was thought to breakup at ~1Ga, by this time (1.5Ga after the end of the Archaean) tectonics would have probably operated as it does today.
		This suggests that supercontinents may bring about their own demise by an elevated mantle temperature beneath them.
	www.tad.me.uk /plumes/superbreak.htm (340 words)

	Atlantica - Enpsychlopedia (Site not responding. Last check: 2007-11-04)
		~1.1 billion years ago: Nena (which contained Atlantica) became part of the major supercontinent Rodinia.
		Atlantica, along with most of Nena except the Eastern Antarctican Craton, was part of the minor supercontinent Protolaurasia.
		~ Cambrian : the major supercontinent Pannotia disintegrated, leaving Atlantica in the minor supercontinent Gondwana.
	www.grohol.com /psypsych/wiki/Atlantica (222 words)

	Laurentian University Laurentian Mountains Laurentians (Site not responding. Last check: 2007-11-04)
		During other times in its past, Laurentia has been part of a supercontinent.
		~2.1 billion years ago, when Kenorland shattered, the Arctica n craton was part of the minor supercontinent Nena along with Baltica and Eastern Antarctica.
		Laurentian Bank of Canada the Laurentian Bank of Canada dates back to 1846 with the founding of the Montreal City and District Savings Bank -Banque d’Epargne by Monseigneur Ignace Bourget, and a group of 15 prominent individuals from Montreal.
	www.masterliness.com /a/Laurentia.htm (582 words)

	Baltica Details, Meaning Baltica Article and Explanation Guide (Site not responding. Last check: 2007-11-04)
		~ Permian, all major continents collide against each other for forming the major supercontinent Pangæa.
		~ Jurassic, Pangæa rifted into two minor supercontinents: Laurasia and Gondwana.
		~250 million years from now, all continents will crash together for forming the major supercontinent Pangæa Ultima.
	www.e-paranoids.com /b/ba/baltica.html (222 words)

	NHNE News Brief 43 (1/3/97)
		By 1980, geological research had confirmed Alfred Wegner's 1912 theory of the supercontinent of Pangea, which split apart 200 million years ago to form present-day land masses.
		Then over the next billion years, in a scenario reminiscent of global bumping cars, Baltica and Arctica collided to form Nena; Ur and Atlantica plowed into Nena producing Rodinia, which reformed into Pangea, the mother of all modern continents.
		The magnitude 8 quake which struck the New Guinea Trench in the western Pacific this past February was the first seismic activity of any significance ever from that area of the world.
	www.nhne.com /newsbriefs/nhnenb43.html (5287 words)

	Science Fair Projects - Baltica
		Or else, you can start by choosing any of the categories below.
		~ Jurassic, Pangaea rifted into two minor supercontinents: Laurasia and Gondwana.
		~250 million years from now, all continents will crash together for forming the major supercontinent Pangaea Ultima, which Baltica will become a part of.
	www.all-science-fair-projects.com /science_fair_projects_encyclopedia/Baltica (362 words)

	Untitled Document
		As the ice sheet reflects most of the sun's heat back into the atmosphere, it collects almost no heat and significantly influences world weather patterns.
		Two hundred million years ago Antarctica was joined to Africa, Australia, India, New Zealand and South America forming the supercontinent, Gondwanaland.
		At least, it may help them think critically about the importance we place on sovereignty, and about the possible alternatives, such as global community with no boundaries.
	www.geocities.com /vu3ybm/science/antarctics.html (20301 words)

	Questions and Answers Dec. 2000 -Zoom Dinosaurs
		150 million years ago, during the Jurassic period, the supercontinent (called Pangaea) was breaking up.
		Two questions: 1) did Parasaurolophus, Lambeosaurus, Saurolophus and perhaps other Lambeosaurs (I know Saurolophus wasn't a lambeosaur) have a skin membrane inbetween the head and the back of the head?
		from Nena S., Merced, CA, USA; December 4, 2000
	enchantedlearning.com /subjects/dinosaurs/questions/old/Qns00Dec.shtml (9518 words)

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