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
Brazos Country, Texas of which, of it is land and is water. City government is by mayor and city council. The Sealy Independent School District serves area students. Brazos Country encompasses the River Ridge Golf Club which occupies the west bank of the Brazos River. Development of the area began in the late 1970s, and the city was incorporated in May 2000. Brazos Country, Texas Brazos Country is a residential community in Austin County, Texas. Brazos Country is located south of Interstate 10 and southeast of Sealy. Downtown Houston is to the east. The eastern city limits of Brazos Country run along the