Piedra Lumbre Formation
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The Piedra Lumbre Formation is a geologic formation that crops out in the Picuris Mountains of northern New Mexico. Detrital zircon geochronology yields a maximum age of 1475 million years, correspond
Outcrop of Piedra Lumbre Formation along highway from Dixon to Picuris Pueblo, New Mexico, USA
Piedra Lumbre Formation, upper left, in contact with thinner beds of Pilar Formation, lower right
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
Piedra Lumbre Formation
…Detrital zircon geochronology yields a maximum age of 1475 Mya, similar to the underlying Pilar Formation but considerably younger than the lower Hondo Group. This suggests that the Pilar Formation and Piedra Lumbre Formation should be removed from the Hondo Group and provides evidence supporting the Picuris…
Hondo Group (Ortega Formation) in the Tusas Mountains, New Mexico