“Mid-Ocean Ridge Formation” explores the geological processes behind the creation of Earth's longest mountain ranges, the mid-ocean ridges. These underwater formations are dynamic zones where plate tectonics and volcanism converge to create new oceanic crust through seafloor spreading. The book argues that understanding these ridges is vital, offering insights not only into Earth's fundamental workings but also into areas like marine resource management. One intriguing aspect is how the geochemistry of erupted lavas provides clues to the mantle's composition. Another is the complex interplay between mantle dynamics, lithospheric stress, and magma generation that dictates ridge morphology. The book presents a comprehensive exploration, starting with the basics of plate tectonics and volcanism. It progresses through geological evidence gathered from ocean floor surveys, including bathymetric mapping and rock sample analyses. Organized into three main sections, it delves into the mechanics of seafloor spreading, magma generation, and the influence of transform faults. By integrating geological and geophysical data, including deep-sea drilling results and numerical modeling, this book provides a detailed synthesis of current research. Its unique value lies in emphasizing the interconnectedness of different scales of observation, from global plate patterns to volcanic rock microstructures.