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Cretaceous-Paleogene Mass Extinction
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The Cretaceous-Paleogene Mass Extinction
What is the Cretaceous-Paleogene extinction?
What is the Cretaceous-Paleogene extinction?
- Part of the "big five"
- Known for killing the dinosaurs (besides avian dinosaurs)
- Also known as the "k-t extinction"
Who did it affect?
Who did it affect?
- more than 3/4th of animal and plant species were affected
- Marine invertebrates
- Land Animals
Marine Invertebrates
Marine Invertebrates
- Coccolithophorids
- Ammonoids
- Belemnoids
- Rudists
- Inoceramids
Land Animals
- Bennettitalians
- Different types of mammals
- Land-dwelling crocodiles
- Pterosaurs
- Dinasaurs:
- Saltasaurid and aeolosaurid titanosaurs
- Abelisaurids and noasaurids
- Tyrannosaurids
- Ornithomimids
- Caenagnathoid oviraptorosaurs
- Therizinosaurids
- Troodontids
- Dromaeosaurids
- Alvarezsaurids
- Enantiornithines
- Hesperornithine
- Nodosaurids
- Ankylosaurids
- Thescelosaurids
- Rhabdodontids
- Hadrosaurids
- Pachycephalosaurs
- Leptoceratopsids
- Ceratopsids
Who Survived?
Who survived?
- Insects
- Amphibians
- Mammals:
- Prototheres
- Allotheres
- Metatheres
- Eutheres
- Turtles
- Lepidosaurs
- Champsosaurs
- Modern-style crocodilians
- Avian Dinasaurs
https://commons.wikimedia.org/wiki/File:Harpymimus_steveoc_(flipped).jpg
When did this occur?
When did it happen?
Around 66 million years ago
How did it happen?
How did it happen?
There are many different theories as to how this mass extinction happened:
1. An asteroid hit Earth somewhere in the Gulf of Mexico
- Caused volcanic eruptions, tidal waves, storms, giant dust clouds
2. Volcanic eruptions
3. Poisonous gasses affected the climate
Resources
Resources
https://www.geol.umd.edu/~tholtz/G104/lectures/104extinct.html
https://www.nationalgeographic.com/science/prehistoric-world/dinosaur-extinction/
https://samnoblemuseum.ou.edu/understanding-extinction/mass-extinctions/end-cretaceous-extinction/
https://commons.wikimedia.org/wiki/File:Harpymimus_steveoc_(flipped).jpg
https://commons.wikimedia.org/wiki/File:Shaximiao_Formation_dinosaurs.jpg