Tectonic Unit: JKS
         Name: San Juan
 
  Description: Jurassic-Cretaceous melange (m), turbiditic
               sandstone, shale, conglomerate and basal mafic
               and intermediate volcanics locally underlain by
               middle Jurassic ophiolite and chert (mJo); marine;
               metamorphosed in San Juan I. to lawsonite,
               prehnite and aragonite
 
    Formation: Insular Belt
                  San Juan Terrane
                       JK   Lummi
                       Jo   Constitution, Fidalgo ophiolite complex includes
                            small areas of:
                       TrJ  Haro, Orca
                       PTr  Deadman Bay, Garrison Schist
                       DP   East Sound
               Coast Belt
                  San Juan Terrane
                       JK   Fidalgo ophiolite and E and W melange belts
 
    Age Range: Upper Jurassic - Lower Cretaceous
  Maximum Age: 157.1 Ma
  Minimum Age:  97.0 Ma