Reasons to Believe

Increase of Atmospheric Oxygen Preceded Cambrian Explosion

TNRTB Archive - Retained for reference information

Biological and geochemical causes of an increase in atmospheric oxygen before the Cambrian explosion reveal fine-tuning in Earth’s biosphere. The larger complex mammals that arrived suddenly ~550 million years ago (during the Cambrian explosion) required an increase in atmospheric oxygen (which occurred around 600 million years ago) to survive. A team of scientists has provided evidence that a more abundant and diverse land-based biosphere fundamentally changed the weathering cycle of continental land masses. Consequently, an increase in clays provided more efficient burial of carbon, which otherwise reacts with oxygen. So, the production of these clays caused an increase in atmospheric oxygen immediately preceding the advent of larger complex mammals. Such sequencing corroborates RTB’s creation model, wherein a supernatural Creator timed the geological, biological, and astronomical processes precisely to prepare Earth for advanced life, particularly human life.

o   Martin Kennedy et al., “Late Precambrian Oxygenation; Inception of the Clay Mineral Factory,” Science 311 (2006): 1446-49.


·         Related Resource

o   Fine-Tuning for Life On Earth (June 2004 update)

·         Product Spotlight

o   Origins of Life, by Fazale Rana and Hugh Ross

Subjects: Speciation Events, TCM - Life Design

Dr. Hugh Ross

Reasons to Believe emerged from my passion to research, develop, and proclaim the most powerful new reasons to believe in Christ as Creator, Lord, and Savior and to use those new reasons to reach people for Christ. Read more about Dr. Hugh Ross.