Early geophysical papers of the Society of Exploration Geophysicists . earlygeophysical00soci Year: 1947 64 L. D. LEET AND W. M. EWING VII. Westerly Results The time-distance graph for Westerly is shown in Fig. 5. The velocity for longitudinal waves obtained from these data was 16,400 + 120 or ± km/sec. Fig. 5. VIII. Average Longitudinal Velocity The weighted average of these three longitudinal velocities is 16,530 + 90 or ± km/sec. The close agreement in velocity found here for three well-separated and different types of granite indicates that minor fl
Early geophysical papers of the Society of Exploration Geophysicists . earlygeophysical00soci Year: 1947 64 L. D. LEET AND W. M. EWING VII. Westerly Results The time-distance graph for Westerly is shown in Fig. 5. The velocity for longitudinal waves obtained from these data was 16,400 + 120 or ± km/sec. Fig. 5. VIII. Average Longitudinal Velocity The weighted average of these three longitudinal velocities is 16,530 + 90 or ± km/sec. The close agreement in velocity found here for three well-separated and different types of granite indicates that minor fluctuations in composition do not seriously affect the velocity. IX. Analyses Chemical The following analyses of specimens from the regions investigated were made by Mr. Forest A. Gonyer, chemist of the Harvard Department of Mineralogy. Mineralogical The following mineralogical analyses were made by Mr. Chalmer , Assistant in the Department of Geology, who was a member of the party throughout the investigation. The Westerly analyses were made from thin sections. The Rockport and Quincy determinations were made by gravity separation methods from initial samples of 1000 grams. 208
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