The rifting of Rodinia between 1 – 0. 5 Ga resulted in the formation of three new continents: Laurasia and East and West Gondwana, of which Atlantica became the nucleus of the latter.

Most of the Mesozoic supercontinent of Pangea was now assembled, although North China ( which would collide in the Latest Carboniferous ), and South China continents were still separated from Laurasia.

Rockall forms part of the deeply eroded Rockall Igneous Centre that was formed as part of the North Atlantic Igneous Province, approximately 55 million years ago, when the ancient continent of Laurasia was split apart by plate tectonics.

When the ancient supercontinent of Pangaea split into two about 180 million years ago, North America remained joined to Eurasia as part of the supercontinent of Laurasia, while South America was part of the supercontinent of Gondwana.

The family is thought to have originated somewhere in Laurasia, possibly North America.

As suggested by the geologic naming, Laurasia included most of the landmasses which make up today's continents of the Northern Hemisphere, chiefly Laurentia ( i. e. the core North American continent ), Baltica, Siberia, Kazakhstania, and the North China and East China cratons.

During the Cambrian, Laurasia was largely located in equatorial latitudes and began to break up, with North China and Siberia drifting into latitudes further north than those occupied by continents during the previous 500 million years.

Laurasia finally divided into the continents after which it is named: Laurentia ( now North America ) and Eurasia ( excluding India ).

As North and South America were still attached to the rest of Laurasia and Gondwana, respectively, the Tethys Ocean in its widest extension was part of a continuous oceanic belt running around the Earth between about latitude 30 ° N and the Equator.

North of the line, it is referred to as Laurasia.

In the Cretaceous, Laurasia split into the continents of North America and Eurasia.

Cretaceous: Laurasia split into the continents of North America and Eurasia.

In the Cretaceous, Laurasia broke up into North America and Eurasia with Avalonia split between them.

At the time, the supercontinent of Laurasia had recently split into the continents of North America and Eurasia, although they were still connected by land bridges.

Millions of years ago, before the opening of the Atlantic Ocean, North America and Eurasia were joined as a single continent, Laurasia.

They were fast, omnivorous or herbivorous dinosaurs from the Cretaceous Period of Laurasia ( now Asia, Europe and North America ), as well as Africa.

Until the discovery of Neuquenraptor, all dromaeosaurids had been found in North America, Europe or Northern China / Mongolia, and scientists believed that dromaeosaurids only inhabited Laurasia, i. e. the Northern Hemisphere.

Ornitholestes ( meaning " bird robber ") is a small theropod dinosaur of the late Jurassic ( Brushy Basin Member of the Morrison Formation, middle Kimmeridgian age, about 154 million years ago ) of Western Laurasia ( the area that was to become North America ).

*~ Cretaceous, Laurasia gradually splits up, Siberia remains part of present day northeastern Eurasia.

In recent years, he has explored the links between old Indian, Eurasian and other mythologies ( 1990, 2001-2010, resulting in a new scheme of historical comparative mythology that covers most of Eurasia and the Americas (" Laurasia ", cf.

By the beginning of the Jurassic, the supercontinent Pangaea had begun rifting into two landmasses, Laurasia to the north and Gondwana to the south.

Pangaea gradually split into a northern continent, Laurasia, and a southern continent, Gondwana.

The oldest metatherian fossils ( Metatheria being a larger clade that groups marsupials with some of their extinct relatives ) are found in present-day China. About 100 mya, the supercontinent Pangaea was in the process of splitting into the northern continent Laurasia and the southern continent Gondwana, with what would become China and Australia already separated by the Tethys Ocean.

The Cimmeria continent rifted away from Gondwana and drifted north to Laurasia, causing the Paleo-Tethys to shrink.

Pangaea subsequently broke up into the northern and southern supercontinents, Laurasia and Gondwana, about 200 million years ago.

The vast supercontinent of Pangaea existed until the mid-Triassic, after which it began to gradually rift into two separate landmasses, Laurasia to the north and Gondwana to the south.

During the Mesozoic era ( about 250 to 65 million years ago ) a large ocean ( Tethys Ocean ), floored by oceanic lithosphere existed in-between the supercontinents of Gondwana and Laurasia ( which lay to the south and north respectively ; Robertson & Dixon, 2006 ).

* Tethys Ocean, a Mesozoic-era ocean between the continents of Gondwana and Laurasia

Palaeogeographic continental regions that include Laurentia, Proto-Laurasia, Laurasia, Euramerica ( the " Old Red Continent "), and Gondwana. The Paleogeographic region is also where paleontologist find answers in history.

At the end of the Carboniferous period ( 300 Ma ), the Hercynian or Variscan orogeny, in which the supercontinent Pangaea formed from Gondwana and Laurasia, was ended.

In paleogeography, Laurasia ( or ) was the northernmost of two supercontinents ( the other being Gondwana ) that formed part of the Pangaea supercontinent from approximately ( Mya ).

When these two continents joined together, Laurasia was nearly reformed, and by the beginning of the Triassic, the East China craton had rejoined the redeveloping Laurasia as it collided with Gondwana to form Pangaea.

First phase of the Tethys Ocean's forming: the ( first ) Tethys Sea starts dividing Pangaea into two supercontinents, Laurasia and Gondwana.

The Tethys Ocean ( Greek: Τηθύς ) was an ocean that existed between the continents of Gondwana and Laurasia during much of the Mesozoic era, before the opening of the Indian and Atlantic oceans during the Cretaceous period.

Around the same time, Laurasia and Gondwana began drifting apart, opening an extension of the Tethys Sea between them that today is the part of the Atlantic Ocean between the Mediterranean and Caribbean.

In 1893, using fossil records from the Alps and Africa, Eduard Suess proposed the theory that an inland sea had once existed between Laurasia and the continents which formed Gondwana II.

The flora of Indomalaya blends elements from the ancient supercontinents of Laurasia and Gondwana.

While vicariance would suggest this represents an ancient distribution limited to the Mesozoic supercontinent Gondwana, the fossil record suggests advanced lungfish had a widespread freshwater distribution and the current distribution of modern lungfish species reflects extinction of many lineages following the breakup of Pangaea, Gondwana and Laurasia.

The formation of the Matterhorn ( and the whole Alpine range ) started with the break-up of the Pangaea continent 200 million years ago into Laurasia ( containing Europe ) and Gondwana ( containing Africa ).

While the rocks constituting the nearby Monte Rosa remained in Laurasia, the rocks constituting the Matterhorn found themselves in Gondwana, separated by the newly formed Tethys Ocean.

*~ Jurassic, Pangaea split up, Siberia stays with Laurasia.

In the Jurassic, Pangaea split into Laurasia and Gondwana, with Avalonia as part of Laurasia.

The Tethys rift eventually extended westward to split Pangaea in two, and the growing Atlantic Ocean separated the northern supercontinent of Laurasia from the southern supercontinent Gondwana.

The supercontinent of Pangea split into Laurasia in the north and Gondwana in the south during the Jurassic.

The Boreoeutheria split into the Laurasiatheria and Euarchontoglires between 95 and 85 mya ; both of these groups evolved on the northern continent of Laurasia.

This is because when the breakup of the single land mass, Pangaea occurred, it was split by the continental drift into Laurasia and Gondwana somewhere between the Jurassic and Cretaceous ages.