. Early geophysical papers of the Society of Exploration Geophysicists. Petroleum; Prospecting. 44 T. L. ALLEN their results showed a gradual thinning of the sedimentary beds and a gradual decrease in the velocity values. The seismograms shown in Plate 2 are the ones from which profile B is plotted, Plate 3 shows the seismograms from which profile C is plotted, and Plate 4 shows those from which profile D is Plate 2.—Seismograms for profile B. STUDY OF RECORDS A study of the three sets of seismograms reveals four distinct record characteristics. The first five seismograms of profile
. Early geophysical papers of the Society of Exploration Geophysicists. Petroleum; Prospecting. 44 T. L. ALLEN their results showed a gradual thinning of the sedimentary beds and a gradual decrease in the velocity values. The seismograms shown in Plate 2 are the ones from which profile B is plotted, Plate 3 shows the seismograms from which profile C is plotted, and Plate 4 shows those from which profile D is Plate 2.—Seismograms for profile B. STUDY OF RECORDS A study of the three sets of seismograms reveals four distinct record characteristics. The first five seismograms of profile B, Plate 2, break sharply and plot on the surface velocity curve; the next four seismograms do not break sharply but have a small wave of short period for the first impulse followed by a wave with a sharp break and large amplitude. The small impulse and the sharp break were 374. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Society of Exploration Geophysicists. Tulsa
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Keywords: ., bo, bookcentury1900, booksubjectpetroleum, booksubjectprospecting
