File:Basalt (McCartys Flow, Holocene, ~2.4 to 3.9 ka; southeast of Grants, New Mexico, USA) 1.jpg
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| Description |
English: Basalt lava flow in the Holocene of New Mexico, USA.
This is part of the McCartys Flow, the youngest lava flow in New Mexico's Zuni-Bandera Volcanic Field. The rocks are basalt, a mafic, aphanitic, extrusive igneous rock dominated by plagioclase feldspar and pyroxene, plus sometimes noticeable olivine. Seen here is a distal part of the flow - the lava originated 37 to 38 kilometers ~southwest of this site, from a shield volcano now capped by a cinder cone. Pahoehoe and aa lavas are present The lithology is vesicular, porphyritic, tholeiitic basalt with olivine phenocrysts. In areas proximal to the vent, plagioclase feldspar phenocrysts are present instead. Glassy basalt (tachylite) is present along flow tops. Stratigraphy: McCartys Flow, upper Holocene, ~2.4 to 3.9 ka Locality: roadside exposures along the northern side of westbound Interstate 40's exit 89, Cibola County, northwestern New Mexico, USA (35° 05.045’ North latitude, 107° 46.071’ West longitude) Mostly synthesized from info. at: geoinfo.nmt.edu/tour/federal/monuments/el_malpais/zuni-ba... |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/52771703865/ |
| Author | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/52771703865. It was reviewed on 26 March 2023 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 04:24, 26 March 2023 | | 3,008 × 1,916 (5.19 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/52771703865/ with UploadWizard |
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