Relative Age - is how old something is compared to how old something else is., Law of Intrusion - Magma intruded through all rock layers ., Fault - Tectonic plate movements can cause rock to break and move along planes called faults., The Law of Superposition - Newer layers of rock form on top of older layers of rock., Relative Dating - Geologists use relative dating to determine the relative ages of rocks & fossils., fossil record - all of Earth's known fossils and the information they provide., Unconformity - some rock layers are missing, forming gaps in the rock record, index fossil - the remains of an organism that was common & can help date other rocks & fossils, absolute dating - technology used to find the ages of rocks, Cross Cutting Law - if a fault or other body of rock cuts through another body of rock then it must be younger in age than the rock through which it cuts and displaces.,

Relative Dating - Rock Layers

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