Marquenas Formation
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The Marquenas Formation is a geological formation that crops out in the Picuris Mountains of northern New Mexico. Detrital zircon geochronology gives it a maximum age of 1435 million years, correspond
Marquenas Formation with crosscutting dike, Picuris Mountains
Coarse conglomerate at the base of the Marquenas Formation
Middle quartzite section of Marquenas Formation
Sample of quartzite from the middle section of the Marquenas Formation
Hondo Group
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The Hondo Group is a group of geologic formations that crops out in most of the Precambrian-cored uplifts of northern New Mexico. Detrital zircon geochronology gives a maximum age for the lower Hondo
Marquenas Formation
…Formation likewise contains zircons dated to 1425 Mya. This suggests that the Pilar Formation and Piedra Lumbre Formation should be removed from the Hondo Group, and grouped with the Marquenas Formation as sediments deposited by the Picuris orogeny. The beds were originally assigned to the lower conglomerate…
Hondo Group (Ortega Formation) in the Tusas Mountains, New Mexico