pleistocene terrace deposits in estero san antonio two interpretations of 1 valley by robert davies
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![Page 1: Pleistocene Terrace Deposits in Estero San Antonio Two interpretations of 1 valley by Robert Davies](https://reader030.vdocument.in/reader030/viewer/2022020111/56649d575503460f94a362b8/html5/thumbnails/1.jpg)
Pleistocene Terrace Deposits in Estero San Antonio
Two interpretations of 1 valley
by
Robert Davies
![Page 2: Pleistocene Terrace Deposits in Estero San Antonio Two interpretations of 1 valley by Robert Davies](https://reader030.vdocument.in/reader030/viewer/2022020111/56649d575503460f94a362b8/html5/thumbnails/2.jpg)
Location Map
![Page 3: Pleistocene Terrace Deposits in Estero San Antonio Two interpretations of 1 valley by Robert Davies](https://reader030.vdocument.in/reader030/viewer/2022020111/56649d575503460f94a362b8/html5/thumbnails/3.jpg)
Work completed by Hitchcock, C.S., Kelson, K.I., 1998,
Assessment of Seismogenic Sources between the Rodgers Creek and San Andreas Faults, Northwestern San Francisco Bay Region, Sonoma County, California
Helley, E. J., Lajoie, K. R., Spangle, W. E, Blair, M. L., 1979, Flatland deposits of the San Francisco Bay Region, California—their geology and engineering properties, and their importance to comprehensive planning
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Hitchcock and Kelson
Qt3
Qt3
Qt2
Qt3
Qt4
Qt4
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Helley et al.
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Time scale
![Page 7: Pleistocene Terrace Deposits in Estero San Antonio Two interpretations of 1 valley by Robert Davies](https://reader030.vdocument.in/reader030/viewer/2022020111/56649d575503460f94a362b8/html5/thumbnails/7.jpg)
Comparison of datesHelley Hitchcock Fossils
Qt4 25-130 ka
Qt3 130ka-550 ka Camel, sloth, bison, mastadon
Qpea 70 ka- 1.8 ma Qt2 320 ka sloth
Qpa 35-70 ka
![Page 8: Pleistocene Terrace Deposits in Estero San Antonio Two interpretations of 1 valley by Robert Davies](https://reader030.vdocument.in/reader030/viewer/2022020111/56649d575503460f94a362b8/html5/thumbnails/8.jpg)
Fossil age Ranges
1 2 3 4 E M L I S W RecentPERISSODACTYLA
EquidaeNannippus beckensis
Nannihippus phlegonEquus simplicidens
Equus parastylidensEquus cumminsii
Equus calobatusEquus hemionus
Equus tauEquus giganteus group
Equus occidentalisEquus complicatus
Equus fraternusEquus scotti
Equus niobrarensisEquus conversidens
Equus lambeiEquus excelsus
Holocene
Irvingtonian RancholabreanBlancan
PleistocenePliocene
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1 2 3 4 E M L I S WARTIODACTYLA
CamelidaeTitanotylopus nebraskensisTitanotylopus spatulusBlancocamelus meadeiMegatylopus cochraniCamelops kansanusCamelops traviswhiteiCamelops sulcatusCamelops huerfanensisCamelops minidokaeCamelops hesternusHemiauchenia blancoensisHemiauchenia macrocephalaPalaeolama mirifica
Blancan Irvingtonian Rancholabrean
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1 2 3 4 E M L I S W RecentPROBOSCIDEA
MammutidaeMammut americanumElephantidaeMammuthus meridionalisMammuthus columbiMammuthus jeffersoniiMammuthus primigenius
Blancan Irvingtonian Rancholabrean
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1 2 3 4 E M L I S W RecentEDENTATA
MegatheriidaeEremotherium rusconiiNothrotheriops shastensisMylodontidaeGlossotherium chapadmalenseGlossotherium harlini
Blancan Irvingtonian Rancholabrean
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Problems in the maps
Formations mapped differently units have different ages based on
the same fossils!