The stone used for posts and homestead buildings was quarried from bedrock found near the surface. This rock is a chalky limestone of rather uniform thickness eight to nine inches deep. When freshly quarried, it is soft enough to be sawed, notched, drilled or shaped with hand tools. After prolonged exposure to air it hardens and becomes weather-resistant.
Visitors will find many buildings, homes and yard ornaments throughout the Russell County area, built from this native limestone, commonly referred to as "post rock."
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A three million acre formation in central Kansas is known as post rock limestone. Cutting of this post rock grew out of the uniqueness of the land and the needs and inventiveness of early settlers. From 1870-1920, limestone was the only building material used in this area. By the mid 1880Lucas, KS Arts
The Grassroots Art Center has been open since 1995 and occupies three turn-of-the century native limestone buildings on the Main Street of Lucas. The main building was a bank until the bank holiday in 1933; it did not re-open as a bank but became the town's post office;Lucas, KS Historic Buildings