These rocks are tilted due to deposition on the non-horizontal surfaces of primitive rocks.
This aspect of Werner's model was useful for explaining the origin of tilted sedimentary rocks.
Archbishop James Ussher of Armagh, Ireland, 1654, added up generations from the Old Testament and determined that Earth formed on October 23, 4004 BCE.
Throughout the history of life, different organisms have appeared, flourished and become extinct.
The most useful indication of time equivalence is similar fossil content, provided of course that such remains are present.
The basis for assuming that like fossils indicate contemporary formation is faunal succession.
How do we know this and how do we know the ages of other events in Earth history?
Prior to the late 17th century, geologic time was thought to be the same as historical time.