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
Trödelsteine (rock formation) Trödelsteine (rock formation) The Trödelsteine, also called the Trödelstein, is a rock formation near Emmerzhausen in the county of Altenkirchen in the German state of Rhineland-Palatinate. It consists of columnar basalt and a basaltic blockfield in the Heller Upland. The rock formation has been designated as a natural monument, about 0.3 hectares in area. The Trödelsteine lies about 1.2 kilometres northeast of Emmerzhausen, 3.6 km southwest of Burbach and 2.6 km northwest of Lippe, which are both in the neighbouring county of Siegen-Wittgenstein in North Rhine-Westphalia. The rocks extend up to the summit of the mountain on which they are