Some are found in these pipes, such as kimberlites, while other diamonds were liberated by water erosion and deposited elsewhere (called alluvial diamonds).According to evolutionists, the diamonds formed about 1–3 billion years ago.Carbon 12 vs Carbon 14 Carbon 12 and Carbon 14 are isotopes of Carbon. These two Carbon isotopes mainly differ in their mass number; the mass number of Carbon 12 is 12 and that of Carbon 14 is 14.
Diamond requires very high pressure to form—pressure found naturally on earth only deep below the surface.
Despite seeming like a relatively stable place, the Earth's surface has changed dramatically over the past 4.6 billion years.
Mountains have been built and eroded, continents and oceans have moved great distances, and the Earth has fluctuated from being extremely cold and almost completely covered with ice to being very warm and ice-free.
The age of the fossil must be determined so it can be compared to other fossil species from the same time period.
Understanding the ages of related fossil species helps scientists piece together the evolutionary history of a group of organisms.