What is another word for geological horizon?
Pronunciation: [d͡ʒˌɪəlˈɒd͡ʒɪkə͡l həɹˈa͡ɪzən] (IPA) 
When studying Earth's geological history, one term you may come across is "geological horizon." This term refers to a specific layer of rock or sediment that formed during a particular time period. Other terms you might hear in place of "geological horizon" include "stratum," "layer," "bed," or "formation." Each of these terms is used to describe a specific level or section of Earth's crust. These layers are incredibly important for understanding the planet's history, as they contain clues about ancient geological events, past climates, and even the evolution of life on Earth. As such, geologists often spend a great deal of time studying these geological horizons and the layers of rock and sediment that make them up.
