Question

determine whether the method listed is an absolute or relative dating method.

law of superposition
uranium-lead dating
speciation
fossilization
stratigraphy
faunel succession

Explanation:

• Law of Superposition: This principle states that in undisturbed sedimentary rock layers, the oldest layers are at the bottom and the younger ones are on top. It only gives a relative order of rock layers (which is older or younger than another), not an exact age. So, it is a relative dating method.
• Uranium - Lead Dating: This is a radiometric dating method. It measures the ratio of uranium isotopes to lead isotopes in a sample. Using the known decay rates of uranium isotopes, it can calculate an absolute age (in years) for the sample. So, it is an absolute dating method.
• Speciation: Speciation is the process by which new species arise. When studying fossils, the presence of certain species (index fossils) can help determine the relative age of a rock layer compared to other layers where different species (index fossils) are found. It does not give an absolute age but a relative position in the geological time scale. So, it is a relative dating method.
• Fossilization: The process of fossil formation. Fossils (especially index fossils) are used in relative dating. For example, if a particular fossil species is known to have existed in a certain geological period, the rock layer containing that fossil is assigned to that period (relative to other layers). It does not provide an absolute age. So, it is a relative dating method.
• Stratigraphy: The study of rock layers (strata). Stratigraphic principles like the Law of Superposition are used. It deals with the relative order and relationships of rock layers. So, it is a relative dating method.
• Faunal Succession: This principle states that fossil organisms succeed one another in a definite and recognizable order. By identifying the fossils (fauna) in a rock layer, we can determine its relative position in the geological time scale (compared to other layers with different fossil assemblages). It does not give an absolute age. So, it is a relative dating method.

Answer:

• Law of Superposition: Relative
• Uranium - Lead Dating: Absolute
• Speciation: Relative
• Fossilization: Relative
• Stratigraphy: Relative
• Faunal Succession: Relative