The end-Cretaceous extinction event and the history of major dinosaur fossil discoveries, one fact per card.
31 cards · basic cards · AI-written, checked twice. Edit anything.
- What event marks the end of the Cretaceous Period?
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The Cretaceous-Paleogene extinction event (K-Pg extinction), a mass extinction 66 million years ago- What is the K-Pg boundary?
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The geological layer marking the transition from Cretaceous to Paleogene periods, characterized by iridium-rich sediment- How old is the K-Pg extinction event?
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Approximately 66 million years ago- What crater in Mexico is linked to dinosaur extinction?
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Chicxulub crater, located on the Yucatan Peninsula- How wide is the Chicxulub impact crater?
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Approximately 180 kilometers (110 miles) in diameter- What size object created the Chicxulub crater?
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A meteorite or asteroid approximately 10-15 kilometers in diameter- What is the iridium layer at the K-Pg boundary?
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A thin layer of sediment enriched with iridium, an element rare on Earth but common in meteorites- What major volcanic activity occurred during the K-Pg extinction?
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The eruption of the Deccan Traps flood basalts in what is now India, releasing massive gases and ash- Do any dinosaurs survive today?
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Yes, birds are classified as living avian dinosaurs- In what year was Megalosaurus scientifically named?
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1824, by William Buckland- Who first scientifically described Iguanodon?
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Gideon Mantell, in 1825- Where was the first Iguanodon fossil discovered?
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In Sussex, England- Who was Mary Anning?
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An early paleontologist and fossil collector from England, famous for discovering marine reptile fossils along the Jurassic Coast- What is Archaeopteryx famous for in paleontology?
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It is a fossilized transitional form linking dinosaurs to birds, showing their evolutionary connection- What major fossil site is famous for K-Pg boundary dinosaur fossils?
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The Hell Creek Formation in Montana
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