Geology Field Survey, Chalk Bluff Outcrop, 1950s

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Geology Field Survey, Chalk Bluff Outcrop, 1950s — Archive & Atlas

An interpretation of depth — not a measured reconstruction

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Geology Field Survey, Chalk Bluff Outcrop, 1950s — Archive & Atlas

Unattributed 1950–1959

AA-2026-144F44

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A line of men in khaki and pale work shirts picks its way along the base of a chalk or caliche bluff, one of the white-faced limestone escarpments common to the Texas Hill Country or the Southern Plains, where erosion does the stratigraphy department's work for free. At the front of the group two men crouch and stand over what appears to be survey equipment, the posture of professionals who have decided that something in this cut bank is worth measuring twice.

Field geology in the 1950s ran on this model: assemble a team, take them to the exposure, and let the rock face do the lecturing. The men are dressed alike in the practical uniformity of a government survey or a university department, which in that era were barely distinguishable from each other in ambition, budget, or khaki inventory. Whatever they are looking for — formation depth, mineral content, water-bearing strata — they are approaching it with the orderly seriousness of people who still believed that enough clipboard work would eventually answer every question the earth was willing to ask.

The creek at the base of the bluff has done most of the interpretive work already, cutting down through the pale strata over centuries to give these men something to read. They are standing inside a geological argument and taking notes on it.

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