154
C. N. Wold· G. J. Schwartz· C. Morrill
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Fig.3a Total land area (km 2 ) covered by naturally occurring evaporites at the present time.
The gray-shaded area shows the standard deviation of evaporites with respect to latitude.
The white line in the middle of each gray area is the mean latitude of evaporites.
b Total present -day land area (km 2 ) in every 1 ° interval of latitude from 60 0 S to 60 0 N.
c Percent of present -day land area covered by evaporites. Horizontal dashed lines were
drawn at 1 and 2% of total land area covered by evaporites. The vertical-dashed line in the
center of each diagram is the location of the equator