* Alfred Wegener (1880-1930): He proposed the theory of continental drift in 1912, suggesting that continents were once connected and have slowly moved apart over millions of years. Though initially dismissed, his work formed the basis for later developments in plate tectonics.
* Arthur Holmes (1890-1965): Holmes was a pioneer in radiometric dating, a technique that allowed for the precise determination of the age of rocks and fossils. This revolutionized understanding of Earth's history and provided strong evidence for the immense timescales involved in geological processes.
It's important to note that these are just two of many influential geologists during the early 20th century. Others like James Hutton, Charles Lyell, and Charles Darwin had laid the groundwork for modern geological thought through earlier research on uniformitarianism, stratigraphy, and evolution.
The development of modern geology is a complex and ongoing process with contributions from many individuals. Wegener and Holmes stand out for their significant breakthroughs that reshaped our understanding of the Earth's structure and history.
