Various field techniques are employed by stratigraphers and structural geologists to measure stratigraphic units. Each method is particularly adapted to conditions that are influenced by the topography and structure of a region, the degree of accuracy required, and the purpose of the measurement. Hand level, Abney level, clinometer, barometer, tape, Brunton, and telescopic alidade are the most common instruments employed. The technique of strapping a Brunton compass to a rod, a so-called “Jacob staff,” has been known for some time.
In preparation for stratigraphic studies in the middle Rockies, N. D. Newell and the author studied the various methods and...
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