AA-2026-B804E5
On the image
A highway cut or quarry face exposes a slice of the earth's autobiography, the kind of unstudied textbook that engineers and road crews saw a hundred times a week and never thought to read. The sedimentary layers lie nearly horizontal, each band a chapter in a story of ancient rivers and shallow seas that nobody was asking about while they were widening Route 40. In the 1950s, the assumption was that the land was a practical problem to be solved—blast it, haul it, level it—not a record worth studying. Someone brought a camera anyway, perhaps out of casual curiosity or the habit of documenting the job, and caught a plain vertical wall of compressed time.
The historian's note
Highway construction in the 1950s routinely exposed geological formations across the United States, creating unintended stratigraphic sections through rock faces that had been buried for millions of years. State highway departments and the nascent Interstate System generated thousands of such exposures. The layering visible here is consistent with sedimentary deposits of the Great Plains or Rocky Mountain region, though the exact location cannot be determined from this frame alone. These construction cuts became informal teaching sites for geologists and a record of the continent's internal structure, visible only where modern machinery had carved it open.
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Geological Strata, 1950s. 1950–1959. Archive & Atlas, Historical Image Library, AA-2026-B804E5. https://thearchive.archiveandatlas.com/library/geological-strata-1950s.
@misc{aaAA2026B804E5,
title = {Geological Strata, 1950s},
year = {1950–1959},
howpublished = {Archive \& Atlas, Historical Image Library},
note = {Accession AA-2026-B804E5},
url = {https://thearchive.archiveandatlas.com/library/geological-strata-1950s}
}TY - ART TI - Geological Strata, 1950s PY - 1950–1959 PB - Archive & Atlas, Historical Image Library AN - AA-2026-B804E5 UR - https://thearchive.archiveandatlas.com/library/geological-strata-1950s ER -
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