. Bulletin. Science; Natural history; Natural history. GEOLOGY OF CEDROS ISLAND 93 CEDR OS GENERALIZED I S LAN D S TR A T 1 G R A P H Y. FORMATION AND MAP SYMBOL COLUMN LITHOLOGY Quaternary Alluvium, dunes landslides Fan glomerate Marine tenace deposits (4) Sand and gravels Eaily to Late Pliocene Conglomerate, sandstone, bio- clastic (algal-nch) rock, friable sands. Organic siltstone and claystone; sandstone, conglomerate. Con^omerate. variegated silty shale and sandstone, tuff. Concretionary sandstone, con- ^omerate; thin, graded ss/silty shale beds, shale. Thin, graded ss/silty shale beds; s
. Bulletin. Science; Natural history; Natural history. GEOLOGY OF CEDROS ISLAND 93 CEDR OS GENERALIZED I S LAN D S TR A T 1 G R A P H Y. FORMATION AND MAP SYMBOL COLUMN LITHOLOGY Quaternary Alluvium, dunes landslides Fan glomerate Marine tenace deposits (4) Sand and gravels Eaily to Late Pliocene Conglomerate, sandstone, bio- clastic (algal-nch) rock, friable sands. Organic siltstone and claystone; sandstone, conglomerate. Con^omerate. variegated silty shale and sandstone, tuff. Concretionary sandstone, con- ^omerate; thin, graded ss/silty shale beds, shale. Thin, graded ss/silty shale beds; shale, concretionary and lent- icular sandstones, con^omerate. tuffC). Congl., graywacke, shale, andesitic flows or sills. Megabreccia, bedded shale, stone, congl. mter- sand- Siliceous shale, silty shale, sand- stone. Conglomerate, pillow - structured volcanics, tuff Massive and pillow - structured volcanics, breccia, chert. In- truded by trachyandesite and granitics. Hornblende dionte and grabbro. Sheared Peridotite, serpentinite vasively sheared Pcr- Gray wacke, shale, chert, pillow - structured volcanics, limestone, glaucophanc and actinolile rock; serpentinite Fig. 2. Generalized Stratigraphy of Cedros Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Southern California Academy of Sciences. Los Angeles, Calif. : The Academy
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