Sediment-Filled Fissures

Photo
Hexagonal cooling joints in Jurassic North Mountain Basalt reactivated as sediment-filled fissures (orange-red material), Fundy basin near Parrsboro, Nova Scotia, Canada. Cooling joints running from the upper right to the lower left were preferentially reactivated. Locally, the fissures contain some late-stage vein material. RWS photo.