Pages authored by Brian D. Keith:

1. Rock Unit Names / Lexington Limestone
   Type locality and history of use of name: The name Lexington Limestone was first used by J. L. Campbell (1879) for an Ordovician limestone near Lexington in western Virginia. This unit was later renamed.
2. Lexington Limestone / Curdsville Member
   Type locality and use of name: The name Curdsville Bed (and Curdsville Substage) was given originally by Miller (1905) to 30 feet (9 m) of fossiliferous and partly cherty rocks exposed at Curdsville in Mercer County, Ky. There it was considered to be the lowermost unit of what is now called the Lexington Limestone.