Boundaries between intervals of the geological time scale are determined by
A) dividing the time range of the interval by the number desired subdivisions, thereby creating equal intervals between the divisions.
B) Major events in the Earth's history, such as major extinctions.
C) using a quantile method whereby the number of years in each subdivision is determined by dividing the number of years by the desired number of classes.
D) Climatic periods based on paleoclimatological reconstructions.

Question

Quizplus · Accepted Answer

Boundaries between intervals of the geological time scale are determined by major events in the Earth's history, such as major extinctions. These events are used as reference points to divide the history of the Earth into different intervals, such as the Permian-Triassic boundary or the Cretaceous-Tertiary boundary. This method is based on significant changes in the composition and diversity of life, as well as changes in the Earth's climate and geology, that mark important transitions in the history of our planet.

Boundaries Between Intervals of the Geological Time Scale Are Determined