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Johnson, Jeffrey A (1988): Composition of Lower Cretaceous sandstones of the Galicia margin [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.743858, Supplement to: Johnson, JA (1988): Composition of Lower Cretaceous sandstone, Galicia margin. In: Boillot, G; Winterer, EL; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 103, 505-512, https://doi.org/10.2973/odp.proc.sr.103.127.1988

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Abstract:
The composition of 31 samples of Lower Cretaceous (Valanginian to Aptian) sandstone from ODP Sites 638 through 641 was analyzed using the Gazzi-Dickinson point-counting method. The results show that the source of the Valanginian to Hauterivian sand was a continental block, dominated by granitic and/or high-grade-metamorphic rocks. Although these petrologic results do not allow discrimination between various potential continental block provinces, they suggest, in conjunction with seismic profiles and regional considerations, that the source was the Galicia margin or western Iberia. In contrast, the Barremian and Aptian sand is dominated by carbonate grains that were derived from a carbonate platform, probably on Galicia Bank.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 42.093544 * Median Longitude: -12.309736 * South-bound Latitude: 42.016700 * West-bound Longitude: -12.463300 * North-bound Latitude: 42.155000 * East-bound Longitude: -12.181700
Date/Time Start: 1985-05-06T00:15:00 * Date/Time End: 1985-06-15T13:30:00
Event(s):
103-638B * Latitude: 42.153300 * Longitude: -12.196700 * Date/Time Start: 1985-05-06T00:15:00 * Date/Time End: 1985-05-12T23:15:00 * Elevation: -4673.0 m * Penetration: 431.1 m * Recovery: 212.87 m * Location: South Atlantic Ocean * Campaign: Leg103 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 45 cores; 431.1 m cored; 0 m drilled; 49.4 % recovery
103-638C * Latitude: 42.153300 * Longitude: -12.196700 * Date/Time Start: 1985-06-01T18:00:00 * Date/Time End: 1985-06-03T20:30:00 * Elevation: -4673.0 m * Penetration: 547.2 m * Recovery: 37.7 m * Location: South Atlantic Ocean * Campaign: Leg103 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 14 cores; 135.2 m cored; 0 m drilled; 27.9 % recovery
103-639D * Latitude: 42.143300 * Longitude: -12.255000 * Date/Time Start: 1985-05-27T19:45:00 * Date/Time End: 1985-06-01T07:00:00 * Elevation: -4753.0 m * Penetration: 293.1 m * Recovery: 24.5 m * Location: South Atlantic Ocean * Campaign: Leg103 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 12 cores; 113.5 m cored; 0 m drilled; 21.6 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets

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Datasets listed in this publication series

  1. Johnson, JA (1988): (Table 1) Composition of lower Cretaceous sandstone of ODP Leg 103 holes. https://doi.org/10.1594/PANGAEA.743855
  2. Johnson, JA (1988): (Table 2) Lithic fragments of lower Cretaceous sandstones of ODP Leg 103 holes. https://doi.org/10.1594/PANGAEA.743857