Relative Dating Methods and Geological Events: Cenozoic, Chicxulub, and More
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Relative Dating Methods
- The erosion of the strata is greater in the continents where the relief is exposed to the weather and its agents of erosion such as running water, glaciers, wind, waves, or tidal surges.
- The erosion process depends on the climate and is greater on rocks on land, above sea level.
- If you see sediments formed in a marine environment, and then you see an erosion surface, we can deduce that there has been a sea regression in between.
The Chicxulub Impact Crater
is an impact crater buried underneath the Yucatán Peninsula in Mexico. It was formed by a large asteroid or comet about 10 kilometers (6 miles) in diameter.
Geological Events during the Cenozoic
- Mid-tertiary period: Continents collide causing the Alpine orogeny, at which the Alps, the Caucasus, the Pyrenees, and the Himalayan mountains rose.
- Quaternary period: The isthmus of Panama was formed as North and South America joined, great ice sheets spread across the continents of the Northern Hemisphere.
Biological Events
Tertiary + Quaternary
Development + diversification of mammals (homo habilis)