Rio Brazos (New Mexico) abruptly west into the Brazos Box, one of the largest canyons in New Mexico with a maximum depth of more than . Here, it passes the Brazos Cliffs, receives Gavilan and Encinado Creeks, and picks up an unnamed tributary which feeds Brazos Falls, reputedly New Mexico's highest waterfall with a total drop of . Northeast of Tierra Amarilla, the river emits from the mountains, receiving Chavez Creek from the right. It passes the settlements of Ensenada, Brazos and Los Ojos before flowing into the Rio Chama about northwest of Santa Fe. The Brazos is a perennial stream, reaching its highest
Fossil Beach (Sedbury Cliffs) examples in the bulk of the mudstone: the cliffs are easily weathered, with parts subject to notable expansion and contraction, Sedbury Cliffs and the foreshore contain similar geological layering to the more famous and visible Aust Cliff the on the opposite site of the River Severn. However, at Sedbury the cliffs are wooded at the top and overgrown with bushes and trees at the base, with fallen blocks and old trunks amongst them. Farther along the beach from the grass, sandstone blocks become more common. The highest rock layer is the brown rocks of the Blue Lias formation, which was