The Extinction

There are many theories on how the dinosaurs went extinct. Some theories are far-fetched such that aliens killed them,but the theories that a meteor or volcanic eruptions can be more scientifically proven.

    In the 1970's Walter Alverez discovered High levels of iridium in the Cretacious/Tertairy (K/T) boundary. Iridium is found in the the earth's core, but never in the mantel or crust. Meteors carry iridium. Shocked quartz, formed by high pressure , are found in the (K/T) boundary. Later a crater was found in the Yucaton Peninsula, showing that the meteor was approximately 10km wide. A meteor that size would have made shock waves of 100,000 billion sticks of dynamite.After the impact tiny bits of rocks are blasted into the sky, and fell back down heating up the sky causing forest fires. Also toxic waste was launched into the sky which blocked out the sun and killed all the plants and dinosaurs.

  There is some proof that a volcanic eruption killed the dinosaurs. The Decan Traps in India is a long chain of igneus rocks formed by a volcano or volcanos. There are still debates that lava could not kill all the dinosaurs. Some scientists said that a volcanic eruption can realease 33 trillion tons of corbon dioxcide, 6 trillion tons of sulfur, and 66 billion tons of flourine and chlorine gas, causing simular effects as a meteor.

  Although the meteor theory is accepted to be true there is one puzzling question: Why did some animals die and others didn't? I leave this question for you to awnswere.    

How Dinosaurs Got Extinct

Dinosaurs have been extinct for thousands of years. Here is what I believe, a giant meteorite bigger than mount Everest crashed in Mexico. The impact caused  disaster such as strong winds and fire.The explosion could not have went around the whole world, acid rain and the heat killed the rest of them.

picture fromhttp://commons.wikimedia.org/wiki/File:KT-impact.gif

Seismosaurus

The seismosaurus is the worlds biggest  dinosaur. It is 50 meters long and 100,000 pounds.

 It was discovered by 4 hikers in New Mexico in 1979. Their names were Arthur Loy, Jan Cummings, Frank Walker, and Bill Norlander. They announced that they found a dinosaur, but the government did not have the tools to dig it up. In 1985 a man named David Gillete decided to dig it up. It took him about 7 years to dig it up.In 1991 he had uncovered it, but he had to try to mach it's bones with other dinosaur bones to see            if it was that dinosaur. He finally announced that it was a new dinosaur. He called it the Seismosaurus which means earthquake lizard. It's name suits it because it was big enough to shake the ground when it walks.










                                                     

Sue The T-rex

In the summer of 1990, a group of workers from the Black Hills Institute were looking for fossils at the Cheyenne River Reservation. They found an Edmontosaurus's bones, and they were ready to leave, but they had a flat tire. Sue Hendrickson decided to explore the cliffs while team went to town to fix the flat. She found two small fossils. When the team came back, she showed the fossils to them,and they identified them as T-rex fossils.

They named the t-rex Sue, after Sue Hendrickson. Sue is the largest T-rex. Sue was auctioned for 8.36 million dollars, That is the most money ever paid for a fossil. Sue permanently remains in the Field Museum Of Natrural History in Chicago, Illnois.

I am back

I am back. I will try to post as often as I can. My next post will be about a  t-rex

Mystery Dinosaur: Flying Pterosaurs

Warning: Don't just scroll down. Guess first.

I am a large pterosaur and I am believed to have migrated long distances. I have a 40 feet wingspan and pluck fish out of the water during flight. My fossils have been found in South America and Europe. 

What am I?

 

A. Pteranodon

B. Tapejara

C. Ornithocheirus   

D. Quetzalcoatlus

And the answer is.....  Ornithocheirus  

Congratulations! You were correct!  We will return in Marine Reptiles.

Mystery Dinosaur:Long Necks

Warning: Don't just scroll down. Guess first.


I am 32 feet long. I was first discovered in Argentina 1991. I am a small sauropod.


Am I:

 A. Amargasaurus

B. Apatosaurus 

C. Argentinosaurus

D. Brachiosaurus 

....... And the answer is..... Amargasaurus. Was that your answer? Good! You Win!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Mystery Dinosaur: Big Carnivores

I am going to give you some facts about a dinosaur and you will have to guess what it is.

Warning! Don't just scroll down. Guess First.

I am one of the most known dinosaurs. I am 39 feet long and my name means "other lizard". I live in USA and I was first found in 1877. I roamed the forests of North America 150 million years ago. I hunt mostly small herbivores. I often hunt in pairs of packs. I also hunt alone. I lived in the Jurassic period. My body is a model of the body of the Carnotoraus.

Am I :

A. Albertosaurus

B. Allosaurus

C. Cyrolophosaurus

or

D. Tyrannosaurus Rex

....And the answer is... Allosaurus Did you get that answer? Good! You Win!

Mystery Dinosaur: Big Claws and Teeth

I am going to give you some facts about a dinosaur and you will have to guess what it is.

Warning! Don't just scroll down. Guess First.

My name means Terrible Claw and I am 10 feet long. I eat meat and lived in the Cretaceous period. I lived in USA and was first discovered in 1969 by Professor John Ostrom.

Am I:

A. Bambiraptor

B. Deinonychus

C. Velociraptor

or

D. Dromaeosaurus

...... And the answer is..... Deinonychus! Did you get that? Superb!

The Mystery Dinosaur: Horns and Spikes

I am going to give you facts about a dinosaur and you will have to guess what it is.

Warning! Don't just scroll down. Guess First.

My name means Spiked lizard. I live in the cretaceous period in Canada. I am 18 feet long.

Am I:

A. Torosaurus

B. Styracosaurus

C. Triceratops

D. Protoceratops

The answer is Styracosaurus!! Did you get that answer? Good.

The Mystery Dinosaur: Sails and Spines

I am going to give you facts about a dinosaur and you will have to guess what it is.

Warning! Don't just scroll down. Guess First.

I live Texas and Oklahoma and I am 30 feet long and 18 feet tall. I travel alone and my name means High Spined lizard. My weight is 3 tons. My speed is 25 mph.

Am I:

A. Irritator

B. Spinosaurus

C. Acrocanthosaurus

D. Suchomimus

Did you guess Acrocanthosaurus? Good! That was the right answer.

Spinosaurus

I like the Spinosaurus so this is why I am righting about him.

Spinosaurus had a crocodile like skull and a sail on its back. The sail on the Spinosaurus's back is more than 6 feet high!

meaning: spine lizard

time: cretaceous

diet: meat

lived: Egypt

Colorado Springs Dinosaur Museum

My family and I went to a dinosaur museum in Woodland Park, Colorado. We drove passed the museum on our long road trip, so we decided to check it out. There were many interesting fossils, and they came in a variety of shapes and sizes. Here are some photos of what we saw.

A map of the early Cretaceous period.

This is me standing by a dinosaur fossil

Utahraptors hunt big herbivores, like the Iguanodon. They used the big claw on their feet to scratch open prey.

The Pteranodon was a large flying reptile that lived near the ocean. It ate fish and squid. It had a wing span of thirty five feet from tip to tip.

This is one of several dinosaur museums that I've been to around the world. Stay tuned for more posts about the other museums I visited.

Diplodocus

A Diplodocus body is slightly bigger than an elephant's body. Baby Diplodocus gains 5 pounds each day. That means, that after each year, they gain half a ton.




Name Means: double-beam

Period: Jurassic

Diet: plants

lived: USA

Dinosaur hip bones.

Dinosaurs are divided in two major groups saurischian which is lizard hipped and ornithischian which is bird hipped.

Dinosaur Facts

Eustreptospondylus

length: 23 feet

lived: England

diet: meat


Ornitholestes

length: 7 feet

weight: 33 pounds

lived: North America

diet: meat

Megalosaurus

lived: England

weight: 2,000 pounds

diet: meat

Dinosaur Facts

Here is some facts about dinosaurs.

Dilophsaurus (the one in the back)

Length: 40 feet

Weight: 12 000 pounds

Lived: North America during early Jurassic Period

Diet: Meat.

Baryonyx (the dinosaur in front)

Length: 30 feet

Lived: England during early Cretaceous Period

Diet: Meat

Velociraptor (the purple dinosaur)

Length: 5 feet

Weight: 65 pounds

Lived: Asia, China, Mongolia during late Cretaceous Period.

Diet: Meat

T-Rex (the brown dinosaur in the back)

Length: 40 feet

Weight: 12 000 pounds

Lived: North America during late Cretaceous period

Diet: Meat

Spinosaurus ( the green dinosaur in the back)

Length: 46 feet

Weight: 6 000 pounds

Lived: Egypt during Cretaceous

Diet: Meat

This is a T-Rex trying to eat me and my sister but luckily we managed to get away.

Styracosarurus

Length: 18 feet

Lived: Canada during the late Cretaceous period.

Diet: Plants

Dinosaur Periods

There are 3 dinosaur periods the Triassic, Jurassic, and Cretaceous.

The Triassic

In the Triassic period all the continents were in one big land mass. It was hot and there was lots of desert.

The Jurassic

North America drifted away from Eurasia. It was warm .

The Cretaceous

Land started to separate and it was very tropical. Some of the plants that started appear were conifer, water lilies, and magnolias.

I am making the Cretaceous Period.

This is the America during the Cretaceous Period.

About Me

Hi,
I am Alex and I am doing a dinosaur project. I am going to teach you about all kinds of dinosaurs. My favorite dinosaur is the Spinosaurus from the Cretaceous Period. I have spent a lot of time researching all kinds of dinosaurs in books and on the internet. All my work will be put in my Lap Book.