. Collected reprints, Essa Institute for Oceanography. Oceanography Fig. 1. (Top) Map of Upper Mantle Project area off California. Fourteen heat flow stations, shown below, lie along A-A'. Bathymetry and the total magnetic field were obtained along A-A', B-B', C-C, and D-D'. The hatched areas represent areas having relief of over 100 meters. Physiographic provinces are based on the map of Menard [1964]. (Bottom) Heat flow values to the nearest tenth in cal cm"2 sec"1 X 10"6. Previously published values by Foster [1962] and Von Herzen [1964] are indicated by F and V
. Collected reprints, Essa Institute for Oceanography. Oceanography Fig. 1. (Top) Map of Upper Mantle Project area off California. Fourteen heat flow stations, shown below, lie along A-A'. Bathymetry and the total magnetic field were obtained along A-A', B-B', C-C, and D-D'. The hatched areas represent areas having relief of over 100 meters. Physiographic provinces are based on the map of Menard [1964]. (Bottom) Heat flow values to the nearest tenth in cal cm"2 sec"1 X 10"6. Previously published values by Foster [1962] and Von Herzen [1964] are indicated by F and VH. Pioneer stations are shown by triangles; Surveyor stations, by circles. Solid circles or triangles indicate high-confidence values and open circles or triangles indicate low-confidence values, as explained in the text. (The remaining figures in this paper, which show heat flow, use this method of identification.) Station numbers from Pioneer and Surveyor are in parentheses and correspond to numbers in Table 1. Contours, in meters, are from the map by Menard [1964]. grad [Gerard et al., 1962; Langseth, 1965]. The equipment and the many uncertainties inherent in the general method of estimating heat flow have been discussed at length by many previous investigators (see for example, Lachenbruch and Marshall [1966] and Langseth [1965]), and these aspects will not be discussed in this paper. The thermal conductivities were determined from thermal resistivity estimates based on water content of the sediments collected by the coring device, using the linear relationship re- ported by Bullard and Day [1961]. The results of the measurements are tabulated in Table 1. The values of heat flow reported in Table 1 are simply the products of the conductivity and the gradient. The indicated confidence has been. 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
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