Disasters occur in cycles, suggests a recent study. A discovery by researchers at the National Geophysical Research Institute in Hyderabad, lends force to their earlier finding that geological and biological calamities including climate changes, sea-level changes and mass extinctions operate cyclically. It has been found that dolomite rocks in deep sea undergo changes in cycles. Analysis of dolomite samples from 127 oceanic sites from all over the globe reveals that changes in dolomite deposits occurring every 24.5 million years coincide with marine biological mass extinctions in the past that happened every 26 million years.
We are a voice to you; you have been a support to us. Together we build journalism that is independent, credible and fearless. You can further help us by making a donation. This will mean a lot for our ability to bring you news, perspectives and analysis from the ground so that we can make change together.
Comments are moderated and will be published only after the site moderator’s approval. Please use a genuine email ID and provide your name. Selected comments may also be used in the ‘Letters’ section of the Down To Earth print edition.