Racial isolates in the United States

Racial isolates in the United States, also variously known as tri-racial isolates, biracial isolates, or American isolates, is a term used by anthropologists to classify approximately two hundred distinct mixed-race communities, traditionally speculated to be of African-American, European-American, and Native American ancestry, located along the Atlantic Seaboard and throughout the American Southeast. The veracity of Native American ancestry claimed among some racial isolate communities has been questioned in recent years with advances in genealogical and genetic research.

Source: Wikipedia — Racial isolates in the United States (CC BY-SA 4.0)