The Ordovician rocks comprise flaggy shales, limestones, red quartzites, quartzites, sandstones and conglomerates. They were usually oval and of slate or very fine micaceous flaggy sandstone about thick. The Barrington Chert is finely laminated and has flaggy bedding. It is now Flaggy Rock Community Centre. It was renamed Flaggy Rock Creek State School in 1920. On 11 October 1916, Rocky Dam State School was opened in Flaggy Rock. The Great North Walk follows Flaggy Creek from Charlestown to the top of the lagoon. Flaggy limestone bluffs are located in the area south and west of the Waikato River.