As early as 1742 Jesuit fathers from Goshenhoppen began to hold services at McCarty's house and continued until 1798 when the Saint John the Baptist parish was established, the first Catholic Church was built for $150 on land donated by Edward McCarty's nephew John.

Its confluence with the Tohickon in the lake is the four corners of Bedminster, Haycock, Nockamixon, and Tinicum Townships.

The Brunswick Formation is a sedimentary layer of rock consisting of mudstone, siltstone, and beds of green, brown, and red-brown shale.

About 200 million years ago, magma intruded into the Brunswick and cooled quickly forming a fine grained diabase consisting of primarily labradorite and augite.

Haycock Mountain (on the right bank of the creek) and several other features in the area are remnants of the intrusion after the Brunswick has eroded away over time.