Figure F90. Close-up of one of the few black shales in Subunit 5C (95-104 cm); it passes transitionally into burrowed claystone above and below. This black shale was thermally altered in proximity to a diabase sill (Subunit 5C: interval 210-1276A-98R-1, 87-110 cm).

Figure F90. Close-up of one of the few black shales in Subunit 5C (95-104 cm); it passes transitionally into burrowed claystone above and below. This black shale was thermally altered in proximity to a diabase sill (Subunit 5C: interval 210-1276A-98R-1, 87-110 cm).