Vitrinite reflectance

Vitrinite reflectance is a scientific measurement used in geology to estimate how much a rock has been subjected to heat over time. It involves shining a light onto a type of organic material called vitrinite, found in coal and sedimentary rocks, and measuring how much light bounces back. The more heat the rock has experienced, the higher the reflectance value. This measurement helps geologists determine the temperature history of a rock and assess the potential presence of oil or gas resources within underground reservoirs.