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Progress in Earth and Planetary Science
Fig. 1 | Progress in Earth and Planetary Science

Fig. 1

From: Formation of lower fast-spread oceanic crust: a structural and geochemical study of troctolites in the Hess Deep Rift (East Pacific Rise)

Fig. 1

Modified from Gillis et al. (2014b). Opx Orthopyroxene

Geological context. a Bathymetric map of the Galapagos triple junction in the eastern equatorial Pacific Ocean highlighting major tectonic boundaries. The white box indicates the location of the map in b. b Regional bathymetric map of the Hess Deep Rift showing the locations of IODP Site U1415 (red star), and ODP Sites 894 and 895 (black stars). The black circles and squares indicate the sampling localities of RRS James Cook cruise JC21. c Micro-bathymetric map showing the locations of Holes U1415I, U1415J and U1415P. d, e Lithostratigraphic columns of Holes U1415J and U1415P. The columns show depths (mbsf), core numbers, lithological units, rock types, and recovery (%). Lithological units (Units 1 to 3) were identified on the basis of downhole changes in lithology and inclination of magnetization direction. Ghost cores (G cores) are material recovered during hole cleaning operations. The bathymetry in a, b is derived from satellite altimetry data, and multibeam bathymetry data available from the Global Multi-Resolution Topography Data Portal at the Lamont-Doherty Earth Observatory.

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