A near-shore,shallow water, light brown to dark gray, thinly bedded siltstone and claystone of the Moreno Formation, containing wood fragments, plant fossils and microfossils.

A massive, thick bedded and fine-grained sandstone with interbeds of argillaceous siltstone and claystone.  Current direction (NW-SE) can be obtained from cross stratification observed in these sediments.  Concretions with different diameters are common in sandstone.

Thin-bedded carbonaceous shale of the Panoche Formation, containing abundant organic matter is exposed along the creek in Del Puerto Canyon.

Load cast and load waves, sedimentary structures typical to turbidities are common in the sandstone and siltstone of the Panoche Formation along Del Puerto Canyon Road.

Unconformity along the Cretaceous sandstone and overlying Quaternary conglomerate in Del Puerto Canyon.

Soil creep within the recent surficial sediments overlying Panoche sandstone in del Puerto Canyon.

 

Interbedded fine grained sandstone and brown silty to clayey concretionary shale of the Panoche Formation exposed along Del Puerto Canyon Road.

Concretionary shale unit of the Panoche Formation, relatively non-resistant to weathering, has good exposures along the Del Puerto Canyon Road.

    

Dark brown graded conglomerate unit of the Panoche Formation in Del Puerto Canyon,   It consists principally of conglomerate, sandstone and shale.  The size of the clasts is gradational from the bottom to the top.

Dark brown, thinly bedded clayey shale of the Adobe Flat Shale Member of the Panoche Formation and unconformably overlying Quaternary terraces exposed along   Del puerto Canyon Road.  Calcareous concretions and lenses of gray limestone are common in shale.

Franciscan melange, a mixture of the intensely sheared sandstone and shale embedded blocks of serpentine, chert and blueschist, along the Del Puerto Canyon Road.

Intensely sheared metashale of the Franciscan Complex.

Deformed radiolarian chert of the Franciscan Complex with chevron folds along the Del Puerto Canyon Road.

Folded bedding surface in radiolarian chert of the Franciscan Complex exposed in a roadcut outcrop in Del Puerto Canyon.

 

Ultramafic rocks, the lowest unit of the Ophiolite Sequence, consisting of intensely sheared serpentinite, hanzburgite, dunite and pyroxenite, are the most abundant rocks in Del Puerto Canyon.

Serpentinite and its alteration to asbestos, veins and nodules of talc exposed along the DelPuerto Canyon Road.

Sandstone dike in a fine-grained arkosic sandstone unit of the Panoche Formation along Del Puerto Creek.

A variety of ore deposits such as manganese, mercury, chromite, and magnesite have been mined during the past 80 years in the Del Puerto Canyon area.Photograph shows a prospect hole drilled in Ophiolite and Franciscan graywacke for magnesite and probably chromite.