The Ghost Rocks Formation represents the youngest phase of a Late Cretaceous to early Tertiary episode of accretion during which about 80 percent of Kodiak Island was added to the continental margin. The formation consists of both structurally coherent terranes and terranes of complexly deformed sandstone-shale melange. Two mesoscopically ductile and regionally occurring deformations and three younger, relatively brittle deformations have affected the melange. D₁ is characterized by a foliation, S₁, which dips northwest and a lineation, L₁, which plunges gently southwest. S₁ is defined by disrupted lithologic layering, pinch and swell structures, the alignment of inclusions, and an anastomosing cleavage in the shales. L₁ is defined by pinch and swell axes, the long axes of inclusions, mullions, and folds of phyllosilicates in the shales. D₂ is characterized by a foliation, S₂, and a lineation, L₂, which respectively dip and plunge parallel to the D₁ fabrics. S₂ is a closely spaced, roughly planar, slaty-like cleavage that commonly transposes, but only locally folds S₁. L₂ is defined by D₂ fold axes and the intersection of S₁ and S₂ which locally is a pencil cleavage. D₁ significantly and substantially altered the original stratigraphy in the melange, and the distinctive disruptive style of the melange is probably a direct consequence of this deformation. The most important structural element that contributed to this deformation, and therefore to S₁ and L₁, was a three-dimensional web structure of cataclastic shear zones. This structural element occurs in essentially every sandstone in the melange and suggests, but does not prove, that D₁ was technically induced. Other common D₁ structural features are calcite-filled veins, swirls and folds of detrital or diagenetic phyllosilicates, and planar shear zones in the shales. Asymmetric D₁ structures, especially disrupted tuff horizons, suggest D₁ occurred during northwest directed layer-parallel shear and underthrusting, although other noncoaxial strain histories are also possible. Layer-parallel simple shear, and coaxial plane, constrictional, and flattening strains appear to be ruled out, however, because they do not explain the general, mesoscopic strains observed in the melange.