Numerical ages for recent geologic events can sometimes be determined by the study of ____________.
A) layering (growth lines) in shells
B) annual growth rings in trees
C) seasonal layering in glacial ice
D) all of the above

Question

Quizplus · Accepted Answer

All of the options mentioned (layering in shells, annual growth rings in trees, seasonal layering in glacial ice) can provide numerical ages for recent geologic events. These methods are examples of relative dating, where the age of an event is determined by its position relative to other events or materials. For example, counting the number of annual growth rings in a tree trunk can provide an estimate of its age, which can then be used to determine the age of a nearby archaeological site or rock formation. Similarly, analyzing the layering in shells or glacial ice can reveal variations in environmental conditions over time, allowing scientists to estimate the age of the layers and the events that created them.

Numerical Ages for Recent Geologic Events Can Sometimes Be Determined