. Oil and gas yielding formations of California. PHOTO 13. Sandstone Formation on Shore-Line, Orange County. .^ic^BKCasy. PHOTO 14. Conglomerate Resting Non-conformably on Sandstone,San Juan Capistrano, Orange County. BETWEEN NEWPORT, OEANGE COUNTY, AND SAN DIEGO LINE. 59 portions of the formation are white or whitish, and in some placesresemble diatomaceous earth. These shales are similar in appearanceto the Middle Neocene shales of the Puente Hills. This shale formation extends inland toward the northernmost ridgeof hills previously mentioned. For some distance inland, the prevail-ing dip is
. Oil and gas yielding formations of California. PHOTO 13. Sandstone Formation on Shore-Line, Orange County. .^ic^BKCasy. PHOTO 14. Conglomerate Resting Non-conformably on Sandstone,San Juan Capistrano, Orange County. BETWEEN NEWPORT, OEANGE COUNTY, AND SAN DIEGO LINE. 59 portions of the formation are white or whitish, and in some placesresemble diatomaceous earth. These shales are similar in appearanceto the Middle Neocene shales of the Puente Hills. This shale formation extends inland toward the northernmost ridgeof hills previously mentioned. For some distance inland, the prevail-ing dip is to the north at an angle of less than 20°. Still farther norththe shales show an undulating structure, and, for the most part, dip ata very low angle. As the northernmost ridge of hills is approached,the prevailing dip is to the south, but it is irregular and greatly increases. These shales overlie the sandstone on the north slope of theSan Juan Hills and form the bedrock throughout a great portion of themesa lands. They are exposed at many points along the Aliso Creektoward El Toro. In this direction there
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