Wiktionary
archaeological horizon
alt. (context archaeology English) A common set of artefacts that identifies a culture and is found disseminated widely (usually over a number of sites, but sometimes widely over one site) but restricted to a single stratum; a layer or stratum. n. (context archaeology English) A common set of artefacts that identifies a culture and is found disseminated widely (usually over a number of sites, but sometimes widely over one site) but restricted to a single stratum; a layer or stratum.
Usage examples of "archaeological horizon".
For example, the date of the Clovis archaeological horizon in North America is usually quoted as around 9000 B.
I don't know a thing about the sea, or even about bicycles, but I do know that the major archaeological horizon is right here.