GENERAL GEOLOGY

Detailed explanation-1: -The relative age of a rock is its age in comparison with other rocks. If you know the relative ages of two rock layers, you know which is older and which is younger, but you do not know how old the layers are in years.

Detailed explanation-2: -The relative age of a rock is its age compared to the ages of other rocks. The absolute age of a rock is the number of years since the rock formed. It can be difficult to determine the absolute age of a rock, particularly a sedimentary rock made of sediments from different source rocks.

Detailed explanation-3: -The age of a rock can be calculated if we look at the ratio of uranium to lead. The older the rock, the lower the ratio of uranium to lead. Young rocks will have high uranium content and low lead content whereas very old rocks will have low uranium content and high lead content.

Detailed explanation-4: -Relative age refers to the approximate age of a specific rock layer. It is determined by comparing its position to other rock layers. The process used to establish whether a rock layer or a geologic event is older or younger than the other without knowing their specific ages is called relative dating.

Detailed explanation-5: -Geologists commonly use radiometric dating methods, based on the natural radioactive decay of certain elements such as potassium and carbon, as reliable clocks to date ancient events.