 The formation is a part of the Queenston Delta clastic wedge, formed as an erosional response to the Taconic Orogeny.Lithologically, the formation is dominated by red and grey shales with thin siltstone, limestone and sandstone interlayers.As materials, comprising the clastic wedge, become coarser in close proximity to the Taconic source rocks, siltstone and sandstone layers are predominant in New York.