axial-tilt cycle

geochronology

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July 17, 2026

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Geochronology is the scientific study of Earth's rock ages and history. It examines rock layers and fossils to understand past geologic events. Geochronometry is the measurement of past time using geochronological methods, particularly those involving radioactive elements.12

The axial-tilt cycle refers to the Earth's axial tilt, which is approximately 23.5°. This tilt causes hemispheres to receive varying amounts of sunlight throughout the year, leading to seasons. The tilt itself fluctuates over tens of thousands of years between 22.1° and 24.5°, influenced by the gravitational pull of the Moon. These orbital variations, including changes in tilt, affect the distribution of solar radiation and have historically influenced major ice ages.345

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climate change
The last great cooling
…cycle (23,000 years) and the axial-tilt cycle (41,000 years). Although the third parameter of Earth’s orbit, eccentricity, varies on a 100,000-year cycle, its magnitude is insufficient to explain the 100,000-year cycles of glacial and interglacial periods of the past 900,000 years. The origin of the periodicity present in Earth’s eccentricity…
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…cycle (23,000 years) and the axial-tilt cycle (41,000 years). Although the third parameter of Earth’s orbit, eccentricity, varies on a 100,000-year cycle, its magnitude is insufficient to explain the 100,000-year cycles of glacial and interglacial periods of the past 900,000 years. The origin of the periodicity present in Earth’s eccentricity…
Read More