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https://ccgm.org/178-410-thickbox_leoshoe/structural-map-of-the-western-pacific-ocean.jpg View full size

Structural Map of the Western Pacific Ocean

1st edition, 2016
Projection for main map: Mercator
Original scale of compilation 1:20 000 000 at equateur
Special edition reduced at 1:28 000 000 scale. Dimensions: 56 x 78 cm
Author: Peter Miles
Co-authors: Manuel Pubellier, CNRS-UMR 8538, Paris  &  Julien Collot, DIMENC-New Caledonia, review by Yves Lagabrielle, CNRS-UMR 6118, Rennes
© CCGM-CGMW 2016

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This map is a compilation of several different physiographic, geological and geophysical parameters illustrating the structure of the region. Amongst others, magnetic anomalies and ocean age are figured in order to provide the reader with an accurate and readable document. Colour coding, shading and various symbols used are identical to those of previous structural maps in this 1:20M series i.e. the structural maps of the Atlantic and Indian Oceans.

The representation of the onshore geology is limited to volcanism related to the ocean margins’ formation. It is featured as oceanic island magmatism and ophiolites – sections of oceanic crust that have been uplifted onto continental crust (obduction).

To maintain legibility within the constraints of an A0 sheet the Structural Map of the Western Pacific Ocean comprises the main structural map and a geodynamic sketch. A reduced image of the seismic epicenter map is included in the Explanatory Notes (download here) and the pdf file at the original scale is available here (click here to download).

The oceanic areas include the following parameters:

  • The age of the oceanic crust in Series/Epochs
  • Magnetic anomaly chron picks where they have been observed or interpreted and published magnetic lineations
  • Seafloor spreading axes, active and fossil
  • Transform faults and fracture zones
  • Subduction zones with associated Benioff zones constrained by earthquake distribution at depth
  • Anomalous relief
  • Seaward dipping reflector (SDR) volcanic sequences
  • Thinned continental crust
  • Hotspots
  • Deep ocean drilling sites – DSDP, IPOD, ODP and IODP - where basaltic basement or transitional crust was reached
  • Sediment thickness - contours over oceanic crust and thinned continental crustal areas
  • Crustal deformation zones


Citation: Miles P., Pubellier M., Collot J., Structural Map of the Western Pacific Ocean at 1:20 000 000 scale. CCGM-CGMW 2016

  • Length 78 cm
  • Width 56 cm
  • Weight 0.070 kg
  • Scale 1:28 000 000