What killed off the dinosaurs

what killed the dinosaurs

They may have contributed to the mass extinction that ended the reign of the dinosaurs. Plants convert carbon dioxide into oxygen during photosynthesis, the process they use to make their own food.

What killed off the dinosaurs

In no way was it on the decline. No purely herbivorous or carnivorous mammals seem to have survived. A research team discovered lots of mercury, for instance, in sediment laid down before the impact. Slowly, though, other scientists began finding iridium evidence at various places around the globe that corroborated the Alvarez theory. The shock of the impact fractured the rock enclosing the Deccan magma, they proposed. The dominance of fungal species lasted only a few years while the atmosphere cleared and plenty of organic matter to feed on was present. The rushing water dumped sediment onto the landscape. How does the K-T extinction compare to this debacle?

He and his son, noted geologist Walter Alvarez, were conducting research in Italy when they discovered a centimeter-thick layer of iridium-enriched clay at the K-T boundary. A scientist who works in that field is known as a physicist. The mineral crystals that make up rock are usually too small to be seen with the unaided eye.

Researchers found that Cretaceous sites, prior to the extinction event, had rich plant and insect-feeding diversity.

dinosaur extinction for kids

This means that the eruptions were raging at the height of the extinctions. Erosion has uncovered dinosaur bones. Diversification of mammals stalled across the boundary.

how did dinosaurs die in real life

It incorporates scientists from many different fields including astrophysics, astronomy, geology, paleontology, ecology, geochemistry, and so on. Studies of fossils found or not found across the boundary between these two periods — abbreviated the K-Pg boundary — show that some three out of every four plant and animal species went extinct at about the same time.

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The Great Mystery: Background