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Molina-Cruz, Adolfo; Price, Patricia (1977): Distribution of opal and quartz in surface sediments from the subtropical southeastern Pacific (Table 1) [dataset]. PANGAEA,, Supplement to: Molina-Cruz, A; Price, P (1977): Distribution of opal and quartz in the ocean-floor of the subtropical southeastern Pacific. Geology, 5(2), 81-84,;2

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The distribution patterns of opal and quartz on the ocean floor of the subtropical southeastern Pacific have been defined by analyzing 59 surface-sediment samples. The opal distribution resembles that of primary productivity in the surface waters, except along the Peruvian and northern Chilean coasts, where dilution reduces opal values. The distribution pattern of quartz represents both eolian and fluvial transport. Quartz distribution extends out as a tongue in the same direction and position as the prevailing southeast trade winds. Along the South American coast, high quartz concentrations are found in patches near shore and decrease rapidly seaward.
Median Latitude: -12.562421 * Median Longitude: -88.053392 * South-bound Latitude: -34.680000 * West-bound Longitude: -110.900000 * North-bound Latitude: 3.067000 * East-bound Longitude: -72.480000
Date/Time Start: 1958-12-05T00:00:00 * Date/Time End: 1972-03-24T00:00:00
Minimum DEPTH, sediment/rock: m * Maximum DEPTH, sediment/rock: m
RC08-98 * Latitude: -13.470000 * Longitude: -92.580000 * Date/Time: 1964-04-10T00:00:00 * Elevation: -3853.0 m * Recovery: 1.48 m * Campaign: RC08 * Basis: Robert Conrad * Method/Device: Piston corer (PC)
RC09-82 * Latitude: -17.570000 * Longitude: -73.150000 * Date/Time: 1965-02-05T00:00:00 * Elevation: -5000.0 m * Recovery: 4.16 m * Campaign: RC09 * Basis: Robert Conrad * Method/Device: Piston corer (PC)
RC09-83 * Latitude: -21.330000 * Longitude: -73.900000 * Date/Time: 1965-02-06T00:00:00 * Elevation: -4332.0 m * Recovery: 6.87 m * Campaign: RC09 * Basis: Robert Conrad * Method/Device: Piston corer (PC)
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEvent
2Latitude of eventLatitude
3Longitude of eventLongitude
4Elevation of eventElevationm
5DEPTH, sediment/rockDepth sedmGeocode
6QuartzQz#Molina-Cruz, Adolfocarbonate and opal free
7Opal, carbonate free fractionSiO2 carb free%Molina-Cruz, Adolfo
114 data points

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