Texas Stadium, the now-demolished former home of the Dallas Cowboys in Irving. Irving was founded in 1903 by J.O. Otto Schulze and Otis Brown. It is believed that literary author Washington Irving was a favorite of Netta Barcus Brown, and consequently the name of the town site, Irving, was chosen.
Shale is a fine-grained sedimentary rock that forms from the compaction of silt and clay-size mineral particles that we commonly call mud. This composition places shale in a category of sedimentary rocks known as mudstones. Shale is distinguished from other mudstones because it is fissile and laminated.
Slate is a metamorphic rock. Slate is actually shale that had low heat and not very much pressure put on it. Slate is mostly formed in mountain areas. It takes thousands of years for slate to change. Slate can be any color but is mostly found in gray or black.