Herbert Harold Read

The "granite controversy" was a major 20th-century geological debate regarding whether granite rock formed from cooling magma or from the transformation of existing rocks. Herbert Harold Read was a leading voice for the transformation side, known as the granitization theory. He famously argued that granites were largely formed in the solid state through the chemical replacement of rocks.

Herbert Harold Read was a prominent professor of geology at the Imperial College of Science and Technology in London. He spent much of his academic career there, influencing generations of British geologists. He also served as the president of the Geological Society of London.

Read made significant contributions to the study of metamorphism, which involves how rocks are altered by heat and pressure. His extensive fieldwork heavily focused on the complex metamorphic rocks of the Scottish Highlands. This field research directly fueled his theories on the origins of granite.

Herbert Harold Read authored several foundational geological texts, most notably "The Granite Controversy," published in 1957. The book outlined his field observations and the resulting debate surrounding the magmatic versus metasomatic origins of granite. It remains a key historical text for understanding 20th-century geological theories.