Radiocarbon dating is one kind of radiometric dating, used for determining the age of organic remains that are less than 50,000 years old.
For inorganic matter and for older materials, isotopes of other elements, such as potassium, uranium, and strontium, are used.
Some types of relative dating techniques include climate chronology, dendrochronology, ice core sampling, stratigraphy, and seriation.
Seriation uses the assumption that once a tool was developed, its use would become more widespread.
Relative dating not only determines which layers are older or younger, but also gives insight into the paleoenvironments that formed the particular sequence of rock.
Similarly, dendrochronology measures the tree rings in trees and assumes they represent years.
(Grammar) grammar denoting or belonging to a class of words that function as subordinating conjunctions in introducing relative clauses.
In English, relative pronouns and determiners include who, which, and that. of or designating a word that introduces a subordinate clause and refers to an expressed or implied element of the principal clause: the relative pronoun who in “That was the woman who called”; the relative adverb where Quotations"Every man sees in his relatives, and especially in his cousins, a series of grotesque caricatures of himself" [H. Mencken Prejudices]"When you are courting a nice girl an hour seems like a second.
When you sit on a red-hot cinder a second seems like an hour.