Liberty Complex, introduced in Muller and others (1985: GSA Abs with Progs, v. 17, p. 617), is described from outcrops around Liberty Lake in central MD as a distinctive assemblage of upper greenschist to lower amphibolite facies metasedimentary rocks with intercalated mafic and ultramafic rocks. The complex is a major tectonostratigraphic unit composed of two lithotectonic units, the Morgan Run Formation (new name) and the Sykesville Formation. Interpreted as an allochthonous, accretionary wedge associated with the volcanic arc terrane of the nearby Baltimore Complex. Lies structurally over and to the west of the newly designated Towson terrane which is composed of the Loch Raven Schist, Oella Formation, Cockeysville Marble and Setters Quartzite. Lies east of the newly named Westminster terrane. Age of complex ranges from Cambrian(?) to Ordovician.

Source: GNU records (USGS DDS-6; Reston GNULEX).

Liberty Complex in the Potomac terrane, MD, is a 2,000-5,000-m-thick assemblage of upper greenschist to lower amphibolite facies metaclastic rocks with intercalated mafic and ultramafic lenses. Complex is composed of (ascending) Soldiers Delight ultramafic complex, Morgan Run Formation (and correlative Piney Run Formation), and Sykesville Formation. Soldiers Delight ultramafic complex is composed of metamorphosed ultramafic rocks with lesser amounts of metagabbro and metapelite and is primarily a serpentinite.

Source: GNU records (USGS DDS-6; Reston GNULEX).