Absolute dating rocks
Conversely, these fluids may metasomatically alter a rock, introducing new Rb and Sr into the rock (generally during potassic alteration or calcic (albitisation) alteration.
The rock cycle describes how rocks transform from one type to another.
Marble, granite, and quartz are valued for their uses in making statues and buildings, Sand and gravel are commonly used for concrete and road building.
These printables describe the rock cycle, the different types of rocks, and the ways people use rocks and minerals.
Although this is a potential source of error for terrestrial rocks, it is irrelevant for lunar rocks and meteorites, as there are no chemical weathering reactions in those environments.
Initial Nd ratios as well) the geological fingerprint of an object or skeleton can be measured, allowing migration patterns to be determined.
However, because Rb substitutes for K in minerals and these minerals have different K/Ca ratios, the minerals will have had different Rb/Sr ratios.