Their Attributes and Geologic Settings - U.S. National Park Service
2006年3月28日 · At Red Rock Canyon the Entrada Sandstone is 85 feet thick and consists of fine-grained massive cliff-forming sandstone. Its colorful outcrop is visible from Montrose, 8 miles distant to the southwest. The greater part of the formation is bright reddish orange, but the upper 17 feet is pale yellowish orange.
Ground water in the San Juan Basin, New Mexico and Colorado
Principal aquifers in the San Juan Basin of New Mexico and Colorado are the Entrada Sandstone, Westwater Canyon Member of the Morrison Formation, Gallup Sandstone, several sandstones in the Mesaverde Group above the Gallup (Dalton Sandstone, Point Lookout Sandstone, Menefee Formation, Cliffhouse Sandstone), and sandstones of tertiary.Most ...
Catastrophic flooding of an aeolian dune field: Jurassic Entrada …
2008年7月7日 · Surveyed outcrops of the Middle Jurassic Entrada Sandstone at Ghost Ranch, New Mexico, show the unusual occurrence of preserved aeolian dune palaeotopography buried beneath subaqueous strata. The preserved dune remnants have relief up to 35 m, trend NNW, and show internal scalloped cross-strata dipping to the WSW, with small sets occurring as ...
Catastrophic flooding of an aeolian dune field: Jurassic Entrada …
2008年7月7日 · Surveyed outcrops of the Middle Jurassic Entrada Sandstone at Ghost Ranch, New Mexico, show the unusual occurrence of preserved aeolian dune palaeotopography buried beneath subaqueous...
It provides a sound basis for a Jurassic sequence stratigraphy in west-central New Mexico that recognizes four regional unconformities: J-2 (base of Entrada and Zuni sandstones), J-3 (base of Todilto Formation), J-5 (base of Salt Wash Member of Morrison Formation) and K-0 (base of Cretaceous Dakota Sandstone).
stone assigned to the Petrified Forest Formation. A prominent, bench-forming sandstone/conglomerate unit as much as 37 m thick at the top of the Petrified Forest Formation is the Correo Member. It is disconformably overlain by the Middle Jurassic Entrada Sandstone. Few paleontological data are available from Triassic rocks around the
Geolex — Entrada publications - USGS
2024年4月4日 · Exeter Sandstone (Upper Jurassic) is mapped in Harding Co, NM (Sierra Grande uplift) and in eastern San Miguel and northwest Quay Cos, NM (Palo Duro basin). Exeter is noted to be equivalent to Entrada Formation on New Mexico State Geologic Map, but not used on this map sheet. Source: GNU records (USGS DDS-6; Denver GNULEX).
Entrada Sandstone - Wikipedia
The Entrada Sandstone is a formation in the San Rafael Group found in the U.S. states of Wyoming, Colorado, northwest New Mexico, northeast Arizona, and southeast Utah. Part of the Colorado Plateau , this formation was deposited during the Jurassic Period sometime between 180 and 140 million years ago in various environments, including tidal ...
Jurassic stratigraphy in west-central New Mexico - ResearchGate
2003年1月1日 · Measured stratigraphic sections of the Entrada Sandstone from the Four Corners through west-central New Mexico. See Appendix 2 for map coordinates of the measured sections.
Catastrophic flooding of an aeolian dune field: Jurassic Entrada …
2008年7月7日 · Surveyed outcrops of the Middle Jurassic Entrada Sandstone at Ghost Ranch, New Mexico, show the unusual occurrence of preserved aeolian dune palaeotopography buried beneath subaqueous strata. The preserved dune remnants have relief up to 35 m, trend NNW, and show internal scalloped cross‐strata dipping to the WSW, with small sets occurring as ...