Florida Rock Industries, Inc announced today that its management is unaware of any material, undisclosed development in its business affairs that would account for the unusual market activity in the Company’s stock on November 8th and 9th, 2005.  Florida Rock Industries, Inc. is one of the nation’s leading producers of construction aggregates, a major provider of ready-mixed concrete and concrete products in the Southeastern and Mid-Atlantic States and a significant supplier of cement in Florida and Georgia. Published under Cement News