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Dinosaur Discoveries Laramidia
Dinosaur Discoveries Laramidia
Published: 2015/03/22
Channel: Michael Vespia
Western Interior Seaway
Western Interior Seaway
Published: 2016/08/31
Channel: WikiWikiup
Dinosaurs of the Lost Continent | Dr. Scott Sampson, Paleontologist
Dinosaurs of the Lost Continent | Dr. Scott Sampson, Paleontologist
Published: 2016/05/05
Channel: Burke Museum
LARAMIDIA paleo talks ep.14
LARAMIDIA paleo talks ep.14
Published: 2016/05/13
Channel: paleo man
WELCOME TO LARAMEDIA
WELCOME TO LARAMEDIA
Published: 2016/01/23
Channel: Matthew Laraway
DIA DAS MAES - video homenagem Marcelo Lara Midia
DIA DAS MAES - video homenagem Marcelo Lara Midia
Published: 2017/05/26
Channel: Marcelo Lara Midia
Plate Tectonics in action
Plate Tectonics in action
Published: 2010/10/25
Channel: Fudd
FESTA 15 ANOS - Barbara Marques - Trailer Marcelo Lara Midia
FESTA 15 ANOS - Barbara Marques - Trailer Marcelo Lara Midia
Published: 2017/05/26
Channel: Marcelo Lara Midia
How to Pronounce Laramidia
How to Pronounce Laramidia
Published: 2015/02/25
Channel: Pronunciation Guide
Kosmoceratops - Video Learning - WizScience.com
Kosmoceratops - Video Learning - WizScience.com
Published: 2015/08/05
Channel: Wiz Science™
Dinosaur Train ~ Dinosaur Big City Part 1 #2
Dinosaur Train ~ Dinosaur Big City Part 1 #2
Published: 2017/04/18
Channel: Mote Fers
Troodon Night Train - Dinosaur Train - The Jim Henson Company
Troodon Night Train - Dinosaur Train - The Jim Henson Company
Published: 2015/08/05
Channel: The Jim Henson Company
Documentaries - Bigger Than T.Rex: Spinosaurus - Documentary 2017 ♥
Documentaries - Bigger Than T.Rex: Spinosaurus - Documentary 2017 ♥
Published: 2017/01/15
Channel: Troy Compton
T-REX VS GODZILLA | BEST SCENES MASHUP HD ✔
T-REX VS GODZILLA | BEST SCENES MASHUP HD ✔
Published: 2016/11/14
Channel: /SMASHED LEGENDS
Dinosaur Train ~ Dinosaur Big City Part 2 #2
Dinosaur Train ~ Dinosaur Big City Part 2 #2
Published: 2017/04/18
Channel: Mote Fers
T-Rex Fossil
T-Rex Fossil
Published: 2013/08/31
Channel: Jurassic56
Eliza  Cate
Eliza Cate's Tyrannosaurus Presentation
Published: 2014/04/24
Channel: Project 45+ (Aust)
LONDON MUSIC PUB - TRAILER FESTA
LONDON MUSIC PUB - TRAILER FESTA
Published: 2017/05/28
Channel: Marcelo Lara Midia
Dinosaur big city Dinosaur train season 2 song
Dinosaur big city Dinosaur train season 2 song
Published: 2017/06/09
Channel: Diana Sawicka
Dinosaur prank - Tyrannosaurus Rex
Dinosaur prank - Tyrannosaurus Rex
Published: 2015/07/01
Channel: NikoLas Vegas
TOP 10 WEIRD Looking DINOSAURS
TOP 10 WEIRD Looking DINOSAURS
Published: 2015/11/24
Channel: Mega Top Tens
Paleo Speedsketching Test 34# Nasutoceratops
Paleo Speedsketching Test 34# Nasutoceratops
Published: 2017/03/08
Channel: Joschua Knüppe
Dinosaurs National Geographic Documentary - Mega Beasts T Rex of the Deep - BBC Wildlife
Dinosaurs National Geographic Documentary - Mega Beasts T Rex of the Deep - BBC Wildlife
Published: 2016/11/07
Channel: Dinosaur Natgeo
Tyrannosaurus speaks
Tyrannosaurus speaks
Published: 2012/08/11
Channel: cashiscream
Tirex
Tirex
Published: 2017/04/04
Channel: Jean-Michel Raynal
SPIDERMAN VS T-REX - TYRANNOSAURUS REX VS SPIDER-MAN
SPIDERMAN VS T-REX - TYRANNOSAURUS REX VS SPIDER-MAN
Published: 2017/04/08
Channel: KjraGaming
Top 10 Classic And Oldest Dinosaur Species
Top 10 Classic And Oldest Dinosaur Species
Published: 2014/05/12
Channel: Animal Breeds
CLIPE EXTERNO - Videobook Larissa 15 anos
CLIPE EXTERNO - Videobook Larissa 15 anos
Published: 2017/08/09
Channel: Marcelo Lara Midia
15 ANOS - Teaser da festa de 15 anos Andrielly
15 ANOS - Teaser da festa de 15 anos Andrielly
Published: 2017/08/19
Channel: Marcelo Lara Midia
Tyrannosaurus - Video Learning - WizScience.com
Tyrannosaurus - Video Learning - WizScience.com
Published: 2015/08/05
Channel: Wiz Science™
Lythronax: Dinosaur of the Day
Lythronax: Dinosaur of the Day
Published: 2016/05/17
Channel: I Know Dino
DAY OFF - DIA DE FOLGA - oque voce faz no se dia de folga?
DAY OFF - DIA DE FOLGA - oque voce faz no se dia de folga?
Published: 2017/05/26
Channel: Marcelo Lara Midia
2 dome-headed dinosaurs the size of German shepherds discovered
2 dome-headed dinosaurs the size of German shepherds discovered
Published: 2017/07/10
Channel: Cristina Sellva
2 Dome Headed Dinosaurs the Size of German Shepherds Discovered
2 Dome Headed Dinosaurs the Size of German Shepherds Discovered
Published: 2017/06/13
Channel: 21 News
KHỦNG LONG bạo chúa, DINOSAUR - T-Rex, Tyrannosaurus Rex, unbox Dinosaur toy, bóc đồ chơi khủng long
KHỦNG LONG bạo chúa, DINOSAUR - T-Rex, Tyrannosaurus Rex, unbox Dinosaur toy, bóc đồ chơi khủng long
Published: 2017/04/07
Channel: BonBi ToysReview
T-Rex Cỗ Xe Tăng Hạng Nặng Thời Tiền Sử - ARK Ragnarock #3
T-Rex Cỗ Xe Tăng Hạng Nặng Thời Tiền Sử - ARK Ragnarock #3
Published: 2017/07/02
Channel: Thành EJ
FESTA ANIVERSARIO HEITOR 2 ANOS
FESTA ANIVERSARIO HEITOR 2 ANOS
Published: 2017/05/26
Channel: Marcelo Lara Midia
GP - "Campanha de Trânsito", da OpusMúltipla para Prefeitura de Curitiba (1/4)
GP - "Campanha de Trânsito", da OpusMúltipla para Prefeitura de Curitiba (1/4)
Published: 2014/01/13
Channel: Prêmio Colunistas Paraná
Top 10 Facts - Utah // Top Facts
Top 10 Facts - Utah // Top Facts
Published: 2016/05/13
Channel: Top Facts
Descubren una nueva especie de tiranosaurio
Descubren una nueva especie de tiranosaurio
Published: 2013/11/08
Channel: Chumy Chamy
Tyrannosaurus dinosaur by © SashM giant killer 2  escaped from Jurassic Park
Tyrannosaurus dinosaur by © SashM giant killer 2 escaped from Jurassic Park
Published: 2016/04/29
Channel: Sash M
My tyrannosaurus rex and Spinosaurus tribute
My tyrannosaurus rex and Spinosaurus tribute
Published: 2013/06/15
Channel: zygarde legendary
Tyrannosaurus Hex
Tyrannosaurus Hex
Published: 2015/04/07
Channel: Bloo
Lythronax: I Know Dino Podcast Episode 52
Lythronax: I Know Dino Podcast Episode 52
Published: 2016/05/17
Channel: I Know Dino
Play Doh Dinosaurs toys games t rex good dinosaur for kids playdough playdoh  peppa pig toys
Play Doh Dinosaurs toys games t rex good dinosaur for kids playdough playdoh peppa pig toys
Published: 2017/01/17
Channel: Disney Toy Train
National geographic - T Rex of the Deep - BBC wildlife animal documentary
National geographic - T Rex of the Deep - BBC wildlife animal documentary
Published: 2016/09/24
Channel: Willow Mcneilly
T-REX ALIVE In Japan  Hidden Cameraشاهد لقطات مضحكه جدا
T-REX ALIVE In Japan Hidden Cameraشاهد لقطات مضحكه جدا
Published: 2014/04/28
Channel: Sort
Tyrannosaurus dinosaur by © SashM giant killer escaped from Jurassic Park
Tyrannosaurus dinosaur by © SashM giant killer escaped from Jurassic Park
Published: 2016/04/28
Channel: Sash M
National geographic - T Rex of the Deep - BBC wildlife animal documentary
National geographic - T Rex of the Deep - BBC wildlife animal documentary
Published: 2016/11/23
Channel: kontagious gaming
New
New 'King of Gore' Dinosaur Reveals T.Rex Lineage
Published: 2017/06/24
Channel: 21 News
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WIKIPEDIA ARTICLE

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Laramidia, circa 100 MYA

Laramidia was an island continent that existed during the Late Cretaceous period (99.6–66 Ma), when the Western Interior Seaway split the continent of North America in two. In the Mesozoic era, Laramidia was an island land mass separated from Appalachia to the east by the Western Interior Seaway. The seaway eventually shrank, split across the Dakotas, and retreated towards the Gulf of Mexico and the Hudson Bay. The masses joined to unite the North American continent.

The name was coined by J. David Archibald in 1996.[1][2]

Geography[edit]

Laramidia stretches from modern-day Alaska to Mexico.[3] The area is rich in dinosaur fossils. Tyrannosaurs, dromaeosaurids, troodontids, hadrosaurs, ceratopsians (including Kosmoceratops and Utahceratops[4]), pachycephalosaurs, and titanosaur sauropods are some of the dinosaur groups that lived on this landmass.

Range[edit]

Vertebrate fossils have been found in the region from Alaska to Coahuila.[4][5][6][7]

Fauna[edit]

From the Turonian age of the Late Cretaceous to the very beginning of the Paleocene, Laramidia was separated from Appalachia to the east. As a result, the fauna evolved differently on each land mass over that time. Geological conditions were generally favorable for the preservation of fossils in Laramidia, making the western United States one of the most productive fossil regions in the world. Less is known about Appalachian biodiversity in the Cretaceous as few fossiliferous deposits exist in the region today and half of the fossil beds in Appalachia were destroyed during the Pleistocene ice age. However, fossil beds which haven't been discovered yet could exist in areas of the former Appalachian continent.

In western North America during the Cretaceous the dominant predators were the tyrannosaurs, huge predatory theropods with proportionately massive heads built for ripping flesh from their prey. In Laramidia the top of the terrestrial food chain was occupied by the theropods of Tyrannosaurinae such as Tyrannosaurus rex, Nanuqsaurus hoglundi,[8] Daspletosaurus, Teratophoneus, and theropods of Albertosaurinae such as Albertosaurus and Gorgosaurus, all being included under the same family of Tyrannosauridae and not actually contemporary. The bodies of tyrannosaurs exhibited huge heads and legs, in contrast to proportionally tiny arms. The teeth exhibited in this family are rather comparable to railroad spikes and would have helped inflict major damage on prey.

Another common group of North American dinosaurs were the hadrosaurs. The fossil record shows a staggering variety of hadrosaur forms in Laramidia.

Other differences in genera appear between the island land masses. Sauropods roamed Laramidia during the Cretaceous after apparently dying out in Appalachia. Nodosaurs, though, appear to have been more plentiful in Appalachia. Nodosaurs were large, herbivorous armored dinosaurs resembling armadillos. They were scarce in Laramidia by the late Cretaceous, existing only in specialized forms like Edmontonia and Panoplosaurus while nodosaurs were thriving in Appalachia.

References[edit]

  1. ^ Archibald, J. David; Dinosaur Extinction and the End of an Era: What the Fossils Say, New York, NY: Columbia University Press, 1996
  2. ^ Laramidia is named for Laramie, Wyoming, located in the former landmass.
  3. ^ MSN, "Amazing Horned Dinosaurs Discovered" (23-Sep-2010) Accessed 23-Sep-2010.
  4. ^ a b Scott D. Sampson; Mark A. Loewen; Andrew A. Farke; Eric M. Roberts; Catherine A. Forster; Joshua A. Smith; Alan L. Titus (2010). "New Horned Dinosaurs from Utah Provide Evidence for Intracontinental Dinosaur Endemism". PLoS ONE. 5 (9): e12292. Bibcode:2010PLoSO...512292S. PMC 2929175Freely accessible. PMID 20877459. doi:10.1371/journal.pone.0012292. 
  5. ^ Rozell, Ned. Geophysical Institute, UAF - Alaska Science Forum, "Shedding light on Arctic dinosaurs, Alaska Science Forum, Article #1737" (10-Feb-2005) Accessed 14-Nov-2011.
  6. ^ U.S. Department of the Interior, Bureau of Land Management, Alaska, Resources, Environmental Education, "Dinosaurs on Alaska's North Slope" (30-May-2008) Accessed 14-Nov-2011.
  7. ^ "Hallan en Coahuila cementerio de dinosaurios" (in Spanish). El Universal. Retrieved 25 April 2015. 
  8. ^ "A Diminutive New Tyrannosaur from the Top of the World" (12-Mar-2014) Accessed 12-Mar-2014.

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