Cockeysville Marble

Cockeysville Marble
Stratigraphic range: Precambrian, Cambrian, or Ordovician
Polished slab of the marble from Cockeysville. Width of slab inside black border is approximately 10.7 cm.
Typemetamorphic
Unit ofGlenarm Supergroup
UnderliesWissahickon Formation
OverliesSetters Formation
Thicknessabout 750 feet
Lithology
Primarymarble
Location
RegionPiedmont of Maryland
Type section
Named forCockeysville, Maryland
Named byWilliams and Darton, 1892

The Cockeysville Marble is a Precambrian, Cambrian, or Ordovician marble formation in Baltimore, Carroll, Harford and Howard Counties, Maryland. It also occurs in two locations in northern Delaware. It is described as a predominantly metadolomite, calc-schist, and calcite marble, with calc-gneiss and calc-silicate marble being widespread but minor.

The extent of this formation was originally mapped in 1892 within Baltimore County by G. H. William, who also named it Cockeysville Marble.

Due to its historical significance, it was proposed in 2020 to include it as a Global Heritage Stone Resource, a designation that provides international recognition of natural stone resources that have achieved widespread utilization in human culture.

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