The Milankovich Cycle
- Created by: Cesca_Willcocks
- Created on: 29-12-16 20:48
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- Milankovitch Cycle
- Eccentricity
- Happens over a period of 100,000 years
- A difference of 20 - 30% on received radiation
- Earth's orbit changes to become more elliptical
- Precession
- Happens over a period of 19,000-23,000 years
- Eccentricity + Obliquity = Precession
- Results in greater seasonal contrasts
- Obliquity
- Happens over a period of 41,000 years
- The tilt of the Earth's axis changes by up to 3 degrees
- Smaller tilt = More ice sheets
- Evidence
- Blue Lias and Kimmeridge Clay
- Repeating layers of clay and limestone
- The changes between lay to limestone happens roughly on a 41,000 year cycle - Correlates with Obliquity
- Kimmeridge Bay displays regular Milankovich cyclicity
- Blue Lias and Kimmeridge Clay
- Eccentricity
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