pleistocene terrace deposits in estero san antonio two interpretations of 1 valley by robert davies
Post on 21-Dec-2015
221 views
TRANSCRIPT
Pleistocene Terrace Deposits in Estero San Antonio
Two interpretations of 1 valley
by
Robert Davies
Location Map
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
Hitchcock and Kelson
Qt3
Qt3
Qt2
Qt3
Qt4
Qt4
Helley et al.
Time scale
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
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
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
1 2 3 4 E M L I S W RecentPROBOSCIDEA
MammutidaeMammut americanumElephantidaeMammuthus meridionalisMammuthus columbiMammuthus jeffersoniiMammuthus primigenius
Blancan Irvingtonian Rancholabrean
1 2 3 4 E M L I S W RecentEDENTATA
MegatheriidaeEremotherium rusconiiNothrotheriops shastensisMylodontidaeGlossotherium chapadmalenseGlossotherium harlini
Blancan Irvingtonian Rancholabrean
Problems in the maps
Formations mapped differently units have different ages based on
the same fossils!