![53.3 Yellow-red radiolarian chert. NE Diablo Range, California. Goethite (?) and hematite color the chert, which has hints of radiolaria appearing as gray spots in the yellow-red chert on the right edge. The black veins are manganese oxide mineral veins, originally deposited as manganese minerals with the chert and remobilized into veins. Gray quartz veins also cross the chert bed and the included, faint laminations. Cream-colored to reddish lichens are present on the upper surface. [Scale shows mm and cm divisions.]](../53.3.JPG)
53.3 Yellow-red radiolarian chert. NE Diablo Range, California. Goethite (?) and hematite color the chert, which has hints of radiolaria appearing as gray spots in the yellow-red chert on the right edge. The black veins are manganese oxide mineral veins, originally deposited as manganese minerals with the chert and remobilized into veins. Gray quartz veins also cross the chert bed and the included, faint laminations. Cream-colored to reddish lichens are present on the upper surface. [Scale shows mm and cm divisions.]