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. ,:Fon~ 9,1sG1 10c r .19721 <br />L:l~:ti ur _1 ... ,r: ~ REPORT ON REFERRED FOSSILS <br />LL~·:lCX; <br />i .STRATIGRAPHIC <br />l .RANGE Miocene OER-.76-8M , l <br />', , : GENERAL . • <br />, ·, ( -LOCALITY <br />!. <br />OUADRANGl[ <br />; OH AREA Various quadrangles as listed below <br />Mollusks <br />DATE <br />HECEIVEO 05/06/76 <br />Complete <br />06/22/76 <br />KINOS OF <br />, FOSSILS <br />STATUS <br />OF WORK <br />REFEllRfO OATE <br />REPORTED BY <br />REPORT, <br />PREPARED OY <br />James M. Hill, Chemicil Resources Branch <br />W. O. Addico1:t <br />This report is basedupon several co.ll~cfions of moT(usks from <br />M·iocene formations in the northernmost part of the DiabLo Range, east <br />of San Francisco Bay •. Very few age determinations can<be.made from <br />this material owing to poor conditions of preservation;.accordingty, <br />age determinations are cited only for those,col[ections in which age <br />diagnostic mollusks could be identified. This kind of preservation <br />to be characteristic of Miocene forma,tions of thi.s area. <br />Fi eJ d lo c • 1 - 8 "'."3 CU S G S Geno z o i c Lo c • M 6614) • 3 , to 0 feet <br />2 , 8 5 0 f e et ~! o f S E co r . s e c . 5 , T . 2 S . , R ~ 1 W • , D u b L i n 7 -1 / 2 <br />quadrangle. Sobrante Sandstone. <br />Bivalve: <br />PATINOPECTeN cf. p~ HAYWARDENSIS (Lutz) <br />.' Age and correlation: middle Miocene~ *Temblor* Stage <br />,'Pacific Coast chrcnology. <br />Environment: middle to inner neritic Csublittoral) zone at <br />epth!:; greater than. about 20 metres. <br />Field loc. 1-:-6-9 (USGS Cenozoic Loe. M6613). 3,200 feet N, <br />2,000 fe.et W of SE car. sec. 5, T. 2 S., R.1 ~J., Dublin 7-1/2 minute <br />quadrangle. Socrante Sandstone. <br />\,.Bivalve: <br />V PATINOPECTEN sp. <br />·>>~::' <br />Age: probabty middle Miocene inasmuch as. this genus appear.s in <br />middle Miocene and is not known to occur in Late Mi.ocene formations <br />in California. Moreover, the fragment resembles the material from Lo~. <br />M6614. @ <br />'>REP.ORT NOT TO BEOUOTED OR PARAPHRASED IN PUBLICATION WllHOUTA .FINAL .RECHECI< BY THE <br />.PALEONTOLOGY:AND STRATIGf~APHY BRANCH. • • • • • •