The Boscobel complex (originally "Boscabel bowlder beds") is unit of interlayered granite and gneiss within Goochland and Powhatan Counties, Virginia.

[2] The complex is mapped in a single, fault-bound area (horst) approximately 9 km long.

[3][4] The Boscobel complex's consists of two interfingered lithologies, a two-mica gneiss and a leucogranite.

The gneiss is foliated and quartzofeldspathic with quartz, plagioclase, muscovite, biotite, and chlorite, with some alkali feldspar.

[1] The largest exposure is the quarry pit of the Boscobel Plant of the Luck Stone Corporation, near the type section.