The Insular Islands were an extended chain of volcanic islands forming an arc in what is now the Pacific Ocean during the Paleozoic and Mesozoic eras. The islands formed by subduction and melting of the Farallon Plate along a fragment (or microplate) upon which they rose called the Insular Plate. They were bounded by the Panthalassic Ocean to the west and the Bridge River Ocean to the east. They probably formed as a composite of several volcanic chains near the equator, offshore of continental landmasses, by the Carboniferous Period around 300-325 million years ago.
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| - Illes insulars (ca)
- Insular Islands (en)
- Isole Insulari (it)
- Îles Insulaires (fr)
- Insular-eilanden (nl)
- Ilhas insulares (pt)
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| - Les Illes Insulars (en anglès: Insular Islands) van ser una cadena gegant d'illes volcàniques actives a l'oceà Pacífic durant el període Cretaci a dalt de l'anomenada , que va començar fa 130 milions d'anys. Les illes insulars estaven envoltades per dos oceans prehistòrics; Pantalassa i . Fa uns 115 milions d'anys, aquestes illes van xocar amb el continent Nord-americà i tancant l'Oceà Bridge a mitjan Cretaci. Com les anterior Illes Intermontanes, la seva gran mida va impedir que fossin empeses sota la Placa Nord-americana. (ca)
- Les îles Insulaires sont un ancien arc volcanique insulaire ayant existé de la fin du Jurassique il y a 200 millions d'années au milieu du Crétacé il y a 115 millions d'années. Elles se trouvaient dans ce qui est aujourd'hui l'océan Pacifique. Actuellement rattachées à une partie de la côte occidentale de l'Amérique du Nord, elles forment les monts Insulaires en Alaska, Colombie-Britannique et État de Washington. (fr)
- Le Isole Insulari erano una vasta catena di isole vulcaniche attive situate nell'Oceano Pacifico durante il Cretacico e che 130 milioni di anni fa iniziarono a sormontare la placca insulare a nordovest dell'attuale Nordamerica. Le Isole Insulari erano circondate da due antichi oceani, la Panthalassa a ovest e l'oceano Bridge River a est. Attorno a 115 milioni di anni fa, a metà del Cretacico, queste isole entrarono in collisione con il continente nordamericano saldandosi con la placca nordamericana e chiudendo il Bridge River Ocean. (it)
- De Insular-eilanden waren een grote groep actieve vulkanische eilanden in de Grote Oceaan gedurende het Krijt (waarschijnlijk vanaf 130 miljoen jaar geleden tot 115 miljoen jaar geleden). Door de westelijke beweging van Noord-Amerika fuseerde de eilandengroep met de westkust van Noord-Amerika in het midden krijt. (nl)
- The Insular Islands were an extended chain of volcanic islands forming an arc in what is now the Pacific Ocean during the Paleozoic and Mesozoic eras. The islands formed by subduction and melting of the Farallon Plate along a fragment (or microplate) upon which they rose called the Insular Plate. They were bounded by the Panthalassic Ocean to the west and the Bridge River Ocean to the east. They probably formed as a composite of several volcanic chains near the equator, offshore of continental landmasses, by the Carboniferous Period around 300-325 million years ago. (en)
- As Ilhas Insulares eram uma cadeia gigante de ilhas vulcânicas ativas em algum lugar no Oceano Pacífico durante o período Cretáceo que montou na parte superior uma microplaca chamada de , começando há cerca de 130 milhões de anos. As Ilhas insulares estavam cercadas por dois pré-históricos oceanos, o Oceano Panthalassa para o oeste e para o leste. Cerca de 115 milhões de anos atrás, essas ilhas colidiram com o continente norte-americano, fundindo-se na e fechando o Bridge River Ocean durante o período do Cretáceo Médio. (pt)
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| - Les Illes Insulars (en anglès: Insular Islands) van ser una cadena gegant d'illes volcàniques actives a l'oceà Pacífic durant el període Cretaci a dalt de l'anomenada , que va començar fa 130 milions d'anys. Les illes insulars estaven envoltades per dos oceans prehistòrics; Pantalassa i . Fa uns 115 milions d'anys, aquestes illes van xocar amb el continent Nord-americà i tancant l'Oceà Bridge a mitjan Cretaci. Com les anterior Illes Intermontanes, la seva gran mida va impedir que fossin empeses sota la Placa Nord-americana. (ca)
- The Insular Islands were an extended chain of volcanic islands forming an arc in what is now the Pacific Ocean during the Paleozoic and Mesozoic eras. The islands formed by subduction and melting of the Farallon Plate along a fragment (or microplate) upon which they rose called the Insular Plate. They were bounded by the Panthalassic Ocean to the west and the Bridge River Ocean to the east. They probably formed as a composite of several volcanic chains near the equator, offshore of continental landmasses, by the Carboniferous Period around 300-325 million years ago. The chain continually moved northward during the Mesozoic. About 115 million years ago in the mid-Cretaceous they finally collided with and fused onto the North American Plate. Like the earlier Intermontane Islands which underwent a similar continental accretion 60 million years before, the large mass of the islands prevented them from being pushed under the North American Plate. This violent collision halted subduction which fed volcanic activity in the Omineca Arc and closed the Bridge River Ocean. The subduction zone moved westward to the Farallon Trench, causing new volcanism which formed the Coast Range Arc. Rocks of the Insular Islands now comprise wide sections of the westernmost coast of the North American plate. This includes both the Insular Mountains of the Alaskan Panhandle, Haida Gwaii, and Vancouver Island, and sunken areas of the greater Insular Belt which takes into consideration rock formed on the floor of the Bridge River Ocean. This extends to the northern North Cascades range in Washington State, perhaps as far as the Wallowa Mountains in northeastern Oregon which may be a displaced fragment from the Insular Belt. The "suture" at the former continental margin is now a major northwest-trending fault through the North Cascades, the 10 kilometers wide, 500 kilometer long Ross Lake Fault. (en)
- Les îles Insulaires sont un ancien arc volcanique insulaire ayant existé de la fin du Jurassique il y a 200 millions d'années au milieu du Crétacé il y a 115 millions d'années. Elles se trouvaient dans ce qui est aujourd'hui l'océan Pacifique. Actuellement rattachées à une partie de la côte occidentale de l'Amérique du Nord, elles forment les monts Insulaires en Alaska, Colombie-Britannique et État de Washington. (fr)
- Le Isole Insulari erano una vasta catena di isole vulcaniche attive situate nell'Oceano Pacifico durante il Cretacico e che 130 milioni di anni fa iniziarono a sormontare la placca insulare a nordovest dell'attuale Nordamerica. Le Isole Insulari erano circondate da due antichi oceani, la Panthalassa a ovest e l'oceano Bridge River a est. Attorno a 115 milioni di anni fa, a metà del Cretacico, queste isole entrarono in collisione con il continente nordamericano saldandosi con la placca nordamericana e chiudendo il Bridge River Ocean. (it)
- De Insular-eilanden waren een grote groep actieve vulkanische eilanden in de Grote Oceaan gedurende het Krijt (waarschijnlijk vanaf 130 miljoen jaar geleden tot 115 miljoen jaar geleden). Door de westelijke beweging van Noord-Amerika fuseerde de eilandengroep met de westkust van Noord-Amerika in het midden krijt. (nl)
- As Ilhas Insulares eram uma cadeia gigante de ilhas vulcânicas ativas em algum lugar no Oceano Pacífico durante o período Cretáceo que montou na parte superior uma microplaca chamada de , começando há cerca de 130 milhões de anos. As Ilhas insulares estavam cercadas por dois pré-históricos oceanos, o Oceano Panthalassa para o oeste e para o leste. Cerca de 115 milhões de anos atrás, essas ilhas colidiram com o continente norte-americano, fundindo-se na e fechando o Bridge River Ocean durante o período do Cretáceo Médio. As Ilhas Insulares formaram pelo menos 210 milhões de anos antes da colisão. Tal como as anteriores , o tamanho grande das ilhas impediu-as de serem pressionadas sob a placa norte-americana. Em vez disso, as Ilhas Insulares foram amassadas e esmagadas ao longo da costa da América do Norte para se tornar parte do continente. A placa insular parou de subduzir sob a América do Norte; a zona de subducção mudou-se para mais para o oeste. As rochas que incluíam as Ilhas Insulares agora formam uma grande característica geológica ao longo da costa da América do Norte, conhecida como . (pt)
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