. Bulletin of the United States Geological Survey--The Santa Clara Valley, Puente Hills and Los Angeles Oil Districts. impelfed right valve; Longitude 80 nun. Lower Miocene, head of TopangaCanyon. :> miles south of Calabasas, Los Angeles County. Usually abun-danl in the lower Miocene: a nearly related, possibly identical form foundin the upper Miocene. Fig. La. Top view of same specimen as fig. 1. Fig. 2. Mytilus mathewsonii Gabb var. crpansus Arnold. 164968. valve; altitude nun. Lower Miocene, supposed equivalent ofthe Vaqueros formation, near Torrey Canyon wells,
. Bulletin of the United States Geological Survey--The Santa Clara Valley, Puente Hills and Los Angeles Oil Districts. impelfed right valve; Longitude 80 nun. Lower Miocene, head of TopangaCanyon. :> miles south of Calabasas, Los Angeles County. Usually abun-danl in the lower Miocene: a nearly related, possibly identical form foundin the upper Miocene. Fig. La. Top view of same specimen as fig. 1. Fig. 2. Mytilus mathewsonii Gabb var. crpansus Arnold. 164968. valve; altitude nun. Lower Miocene, supposed equivalent ofthe Vaqueros formation, near Torrey Canyon wells, southwesl of Pirn,Ventura County. This species is usually found in the faunas of the lowerMiocene through central and southern California. Fig. 3. Scutella fairbanksi Merriam. Same locality as fig. 2, butpossibly al a somewhat Lower horizon. Fig. 4. Ocinebra topangensis Arnold. 164995. Type. Back view; alti-tude 59 nun. Lower Miocene. Topanga Canyon, 3 miles south of Cala-basas, Cos Angeles County. So far known only from this J. S. GEOLOGICAL SURVEV BULLETIN NO. 309 PL. XXX. MIOCENE ECHINOIDEA, PELECYPODA, AND GASTEROPODA. PLATE XXXI. Miocene Pelecypoda and Gasteropoda.(All figures natural size.) Fig. !. Pecten (Lyropecten) crassicardo Conrad. 164967. Exterior of valveshowing characteristic sculpture; altitude 90 mm. Lower Miocene, OjaValley. Ventura County. This species ranges through the lower andupper Miocene, being commoner in the former in southern California, inthe latter in central California. It is sometimes more convex than thefigured specimen, and often shows concentric undulations of the disk Fig. 2. Pecten (Chlamys) sespeensis var. hydei Arnold. Collection of Delos Right valve, ear missing; altitude 46 mm. Lower Miocene,Lynchs Mountain, San Luis Obispo County. Found also in the Vaqueroeformation. Little Sespe Creek, and, with Mytilus mathewsonii Gabl>, insupposed equivalents of theVaqueros formation ne
Size: 1120px × 2232px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookidbulletinofunited309eldr
