Word: Craton
Part of Speech: Noun
A "craton" is a very old and stable part of a continent. It usually forms the central area of a continent and has been around for a long time, often since the Precambrian period, which is a time in Earth's history that happened over 540 million years ago.
"The Canadian Shield is an example of a craton, as it is a large area of ancient rock that is very stable."
In more advanced contexts, "craton" could be discussed in relation to tectonic plates, mineral resources, or the geological history of regions. For example, you might say: "Geologists study cratons to understand the processes that shaped the continental crust."
In a specific geological context, "craton" does not have different meanings; it retains its definition related to the stable parts of continents.
There are no commonly used idioms or phrasal verbs that include the word "craton," as it is a technical term specific to geology.
Understanding the term "craton" can help you learn more about how continents are structured and the history of our planet.