The flow of migrants into Queens followed
particular paths. Two of the most
prominent included Northern Boulevard,
which began at the foot of the Queensboro
Bridge and extended through northern
Queens to the Nassau County line, and a
southern route that followed Jamaica Avenue
from Brooklyn, throughout Queens
just south of the terminal moraine – a large
ridge that spans across the center of
Queens and marks the furthest glacial
extent of the last ice age. These corridors were influential in creating ethnic concentrations
of the 20th Century within specific
neighborhoods (Figure 2)