Shale Smear Factor Fig1.png|{{figure number|1}}Field example of clay smears separating sandstones from Frechen lignite mines, Germany (Modified from Weber et al.<ref name=Weber />). Note tapering of clay (black) away from the source bed and the compound nature of the clay smear in the fault zone. (No scale on original figure.) | Shale Smear Factor Fig1.png|{{figure number|1}}Field example of clay smears separating sandstones from Frechen lignite mines, Germany (Modified from Weber et al.<ref name=Weber />). Note tapering of clay (black) away from the source bed and the compound nature of the clay smear in the fault zone. (No scale on original figure.) |