/ reply You need to login before you can answer. It is not uncommon that some species have repeated names such as Lutra Lutra, Bombus Bombus, Turdus Turdus, Lupus Lupus etc. When it is necessary to use a Latin name, follow the standard practice.t is not uncommon that some species have repeated names such as Lutra Lutra, Bombus Bombus, Turdus Turdus, Lupus Lupus etc. When it is necessary to use a Latin name, follow the standard practice.
A sample of gneiss from the site of the Earth's oldest dated rocks (the Acasta River area of Canada). This sample has been dated at 4.03 billion years old.
Determining the Relative Ages of Rocks [edit]. 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.he principle of superposition states that the oldest sedimentary rock units are at the bottom, and the youngest are at the top. Based on this, layer C is oldest, followed by B and A. So the full sequence of events is as follows: 1  Layer C formed. 2  Layer B formed.