Image of the Day — Three Historical Events: Eruption, Mass Wasting and Humans
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Posted: Wednesday, January 24, 2024
Three Historical Events: Eruption, Mass Wasting and Humans. Petroglyphs on basalt, Mesa Point Trail, Boca Negra Canyon, Petroglyphs National Monument, Albuquerque, New Mexico.
Image taken:
10/08/2020
by: Mark Leo-Russell
©
2020
Image courtesy of Mark Leo-Russell for use by the NM Bureau of Geology and Mineral Resources. All other rights and use restricted.
Longitude: -106.715548038
Latitude: 35.1609992505
(WGS 84 or NAD 83)
About this image
Three Historical Events: Eruption, Mass Wasting and Humans. This photo shows the results of three events over geologic time: First, the eruption of basalt lava flows approximate 200,000 years ago followed by a period of erosion and mass wasting. During this second period the blocks of basalt were eroded from the flow and tipped over as they moved down-slope. The vesicles or gas bubbles shown along the bottom of these boulders were originally along the top of the flow. Finally, ancient indigenous people chipped off the outer weathered surface of the basalt exposing the lighter-colored rock creating the petroglyph.
Location
Mesa Point Trail, Boca Negra Canyon, Petroglyph National Monument, Albuquerque, New Mexico.
Camera Details
SONY DSLR-A100 Exposure: 40.0 mm (35mm equiv: 60mm) f/8.0 1/250 sec ISO 100.
Image posted: 06-15-2022