1904 and rutherford and radiometric dating
Recognizing that different layers of rock represent different periods in Earth history, they calculated a much looser estimate: 1 million to 1.6 billion years old.By the early 1900s, scientists began to understand radioactivity, and found that each radioactive element has a half-life—a specific amount of time it takes to lose half its energy.
Canyon Diablo meteorites include many fragments of the asteroid that created Barringer Crater (Meteor Crater), Arizona, United States.As a child he lived in Low Fell, Gateshead and attended the Gateshead Higher Grade School.), but took a course in geology in his second year which settled his future, against the advice of his tutors.By studying these, and meteorites that landed on Earth from within our solar system, we’ve arrived at an age for Earth of 4.55 billion years. Age of the Earth | USGS Dear Science: How Do We Know How Old the Earth Is? | Live Science Where Are the Oldest Rocks on Earth Found? Arthur Holmes was born in Hepburn, near Newcastle-upon-Tyne, the son of David Holmes, a cabinet-maker, and his wife, Emily Dickinson.As Holmes, writing in Nature in 1913, put it: "the geologist who ten years ago was embarrassed by the shortness of time allowed to him for the evolution of the Earth's crust, is still more embarrassed with the superabundance with which he is now confronted." It continued to be hotly debated for decades.
Cherry Lewis commented, "In the 1920s, as the age of the Earth crept up towards 3 billion years, this took it beyond the age of the Universe, then calculated to be only 1.8 billion years old.
Holmes died in 1964 having lived just long enough to see sea floor spreading confirm his ideas of continental drift.
In the midst of World War II on August 18, 1943, the USS Abner Read struck what was presumed to be a Japanese mine in the Bering Sea.
You know, for example, that the First World War came before the Second World War, but how long before?
Was it tens, hundreds or even thousands of years before?
In 1911 the discovery that the world was billions of years old changed our view of the world forever.