The phrase "foundational event" is correct and usable in written English.
It can be used to refer to a significant occurrence that serves as a basis for future developments or actions.
Example: "The signing of the treaty was a foundational event that shaped the course of the nation's history."
Alternatives: "key event" or "pivotal moment."
Iran's leaders celebrate the takeover every year as a foundational event of the Islamic revolution.
The revelation of the Qurʾān to the Prophet Muhammad, beginning at some point early in the 7th century ad, is the foundational event in Islam.
The Act of Union is the foundational event of modern Scotland, and not just for nationalists – although they see 1707 as a defining act of grand historic treachery and corruption.
A Gallup survey found that less than half of Americans can name the first book of the Bible (Genesis), only a third know who delivered the Sermon on the Mount (Billy Graham is a popular answer) and a quarter do not know what is celebrated at Easter (the resurrection, the foundational event of Christianity).
No foundational event was assumed (i.e., marker and QTL alleles were assigned at random in the ancestral population).
In addition, it constitutes a foundational event in CLL ethiopathogenesis, as suggested by the fact that 20% of CLL cases from unrelated patients display extremely similar, sometimes even identical antigen receptors.
And certain foundational events are acknowledged.
He soon found himself covering one of modern Ukraine's foundational events.
The latter essentially comes from biblical religion; the former viewpoint tends to treat time cyclically and mythically referring to foundational events, such as the creation, the beginning of the human race, and the Fall of man, on to illud tempus (the sacred primordial time), which is re-enacted in the repetitions of the ritual and in the retelling of the myth.
The foundational issue is a question of property rights".
There is, however, a foundational issue that arises here.
