The agricultural communities of what now comprise Parsippany-Troy Hills were settled in the mid-eighteenth century, but time has destroyed many of the artifacts of the area's early years. Evidence of rock shelters that were used by the Lenni-Lenape Indians is still present, but the farms that once existed have been replaced by modern developments. Lake Passaic, formed by a receding ancient glacier, once covered Parsippany-Troy Hills. This geological phenomenon left behind fascinating rock formations and a rich, fertile soil. The Baldwins, Smiths, Farrands, Bateses, Condits, Mitchells, Howells, Cobbs, Ogdens, Kitchells, and Motts are prominent families who worked the land together to lay the economic and cultural foundations of these early communities.