Cross cutting relationships used relative dating

Let's say we find out, through numerical dating, that the rock layer shown above is 70 million years old.

We follow this same idea, with a few variations, when we talk about cross-cutting relationships in rock.Try it risk-free Discover how geologists study the layers in sedimentary rock to establish relative age.Learn how inclusions and unconformities can tell us stories about the geologic past.These items are called inclusions - foreign bodies of rock or mineral enclosed within another rock.Because the sedimentary rock had to have formed around the object for it to be encased within the layers, geologists can establish relative dates between the inclusions and the surrounding rock.

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