Nacimiento Formation Nacimiento Formation The Nacimiento Formation is a sedimentary rock formation found in the San Juan Basin of western New Mexico (United States) and named for the Nacimiento Mountains. It is a heterogeneous nonmarine formation composed of shale, siltstone, and sandstone, deposited in floodplain, fluvial and lacustrine settings, and made up of sediment shed from the San Juan uplift to the north and the Brazos-Sangre de Cristo uplift to the east. It was deposited mostly between ~64.5 and ~61 million years ago, during the early and middle Paleocene. The climate was humid and warm to hot. This unit interbeds with the
Washington-on-the-Brazos, Texas virtually abandoned. The State of Texas purchased of the old townsite in 1916 and built a replica of the building where the delegates met. The state acquired more of the site in 1976 and 1996. Located between Brenham and Navasota off State Highway 105, the site is now known as Washington-on-the-Brazos State Historic Site. It covers , and features three main attractions: Independence Hall, Barrington Living History Farm, and the Star of the Republic Museum, which is administered by Blinn College. The site's visitor center is free and includes interactive exhibits about the Texas Revolution and the park's attractions, a